Introduction - ENGINE
- Make
- Fiat
- Model
- Stilo Factory Service Manual
- Year
- 2001–2007
- Section
- General › Introduction - ENGINE
Introduction - ENGINE
Hardened and tempered steel
Heat treatment applied to special steels to improve their mechanical characteristics: it consists of hardening, followed by tempering to induce a significant increase in toughness of the material.
Tempering: consists of heating to a temperature of < 720°Χ φολλοωεδ βψ σλοω χοολινγ, in order to attenuate the effects of the hardening without eliminating its effects.
The material thus returns to a condition as close as possible to a stable chemical-physical balance.
Hardening: this is obtained when the structure of the metal at high temperature is harder and stronger than when cold.
Hardened and tempered steel
Heat treatment applied to special steels to improve their mechanical characteristics: it consists of hardening, followed by tempering to induce a significant increase in toughness of the material.
Tempering: consists of heating to a temperature of < 720°Χ φολλοωεδ βψ σλοω χοολινγ, in order to attenuate the effects of the hardening without eliminating its effects.
The material thus returns to a condition as close as possible to a stable chemical-physical balance.
Hardening: this is obtained when the structure of the metal at high temperature is harder and stronger than when cold.
Hardened and tempered steel
Heat treatment applied to special steels to improve their mechanical characteristics: it consists of hardening, followed by tempering to induce a significant increase in toughness of the material.
Tempering: consists of heating to a temperature of < 720°Χ φολλοωεδ βψ σλοω χοολινγ, in order to attenuate the effects of the hardening without eliminating its effects.
The material thus returns to a condition as close as possible to a stable chemical-physical balance.
Hardening: this is obtained when the structure of the metal at high temperature is harder and stronger than when cold.
CONDENSATION
This is the passage of a substance from the vapour state to the liquid state; it takes place by compression or cooling.
Hardened and tempered steel
Heat treatment applied to special steels to improve their mechanical characteristics: it consists of hardening, followed by tempering to induce a significant increase in toughness of the material.
Tempering: consists of heating to a temperature of < 720°Χ φολλοωεδ βψ σλοω χοολινγ, in order to attenuate the effects of the hardening without eliminating its effects.
The material thus returns to a condition as close as possible to a stable chemical-physical balance.
Hardening: this is obtained when the structure of the metal at high temperature is harder and stronger than when cold.
CURRENT DEVELOPMENTS
These engines are fitte with ''Bosch Common Rail EDC-16C8 high pressure electronic injection systems for fast diesel engines totally managed by an electronic control unit.
CONTROL AREA NETWORK (CAN)
The CAN communication network allows data transmission between the ECU and other car computers.
The advantages of this system are that it does not require a lot of wiring and the number of sensors is reduced (because the computers are interconnected by the data transmission system, data supplied by one sensor may be used by several devices simultaneously).
The CAN also makes the fault diagnosis system more effective, speeds up signal transmission and improves component electric/magnetic compatibility (relationship between the various electric and electronic circuits on the car and interaction between the car and its surroundings).
The circuit that connects the ECU to the other terminals is an integrated circuit referred to as a CAN iinterface. Its function is to convert messages received by via the data transmission system into appropriate form.
CONTROL AREA NETWORK (CAN)
The CAN communication network allows data transmission between the ECU and other car computers.
The advantages of this system are that it does not require a lot of wiring and the number of sensors is reduced (because the computers are interconnected by the data transmission system, data supplied by one sensor may be used by several devices simultaneously).
The CAN also makes the fault diagnosis system more effective, speeds up signal transmission and improves component electric/magnetic compatibility (relationship between the various electric and electronic circuits on the car and interaction between the car and its surroundings).
The circuit that connects the ECU to the other terminals is an integrated circuit referred to as a CAN iinterface. Its function is to convert messages received by via the data transmission system into appropriate form.
CONTROL AREA NETWORK (CAN)
The CAN communication network allows data transmission between the ECU and other car computers.
The advantages of this system are that it does not require a lot of wiring and the number of sensors is reduced (because the computers are interconnected by the data transmission system, data supplied by one sensor may be used by several devices simultaneously).
The CAN also makes the fault diagnosis system more effective, speeds up signal transmission and improves component electric/magnetic compatibility (relationship between the various electric and electronic circuits on the car and interaction between the car and its surroundings).
The circuit that connects the ECU to the other terminals is an integrated circuit referred to as a CAN iinterface. Its function is to convert messages received by via the data transmission system into appropriate form.
EVAPORATION
This is the passage of a body from the liquid state to the gaseous state. It occurs at any temperature, but all the more slowly the lower the temperature.
Closed-deck
This indicates the type of assembly of the cylinder liners in the cylinder block; in this case the two components are integral in the top.
PERFORMANCE
This engine is able to provide the following performance:
- maximum power 85 KW CEE at 4000 rpm;
- maximum torque 275 Nm CEE at 2000 rpm.
Condensation
This the reverse of evaporation, i.e. when a substance passes from the vapour state to the liquid state; it takes place by compression or cooling.
Condensation
This the reverse of evaporation, i.e. when a substance passes from the vapour state to the liquid state; it takes place by compression or cooling.
Closed-deck
This indicates the type of assembly of the cylinder liners in the cylinder block; in this case the two components are integral in the top.
RESONANCE
Phenomenon in which the amplitude of oscillations induced in a vibrating system tends, under particular conditions, to become intensified (amplified) beyond all limits.
Condensation
This the reverse of evaporation, i.e. when a substance passes from the vapour state to the liquid state; it takes place by compression or cooling.
DEVICES ADOPTED
These engines are fitted with the following emissions control devices:
- exhaust system with oxidising catalytic converter;
- E.G.R. exhaust gas recirculation system with heat exchanger;
- crankcase vapour/gas recirculation system.
DUCTILE OR SPHEROIDAL CAST IRON
Cast iron is referred to as ductile or spheroidal when, due to the addition of cerium and magnesium, globules or spheres of carbon at the graphite stage are contained in a mainly ferrite matrix. All the mechanical and technological properties of the metal are improved so it can be forged, welded and machined.
Its applications are very wide, because - unlike normal cast iron - it offers appreciable strength and percentage lengthening values.
TIMING
Numerous components (ignition - timing - injection) work in synchrony with the piston movements. They must therefore be perfectly in time with the crankshaft, to which they are connected by toothed chains or belts.
The ignition timing is the angular link between piston position and the moment at which the spark is struck (ignition advance).
Ignition timing is used to determine the moment of valve opening or closure in relation to piston position.
Injection timing is used to determine the injector or electric injector opening position in relation to piston postion.
Condensation
This the reverse of evaporation, i.e. when a substance passes from the vapour state to the liquid state; it takes place by compression or cooling.
VISCOSITY
Property of matter whereby the particles of a body meet 'resistance' in sliding in relation to each other.
The value of the resistance or internal friction depends on the nature of the body, large in solids, very small in viscous liquids and non-existent in gases.
In liquids, viscosity decreases rapidly as temperature increases.
Evaporation
Also called vaporization, this is the passage of a body from the liquid state to the gaseous state.
It occurs at any temperature, but, when all other conditions are the same, all the more slowly the lower the temperature.
STRUCTURE
The unit comprises the engine and all the systems required for its operation:
- fuel system;
- air turbocharging system;
- engine cooling system;
- exhaust system with catalytic converter;
- oil vapour recirculation system;
- E.G.R. exhaust gas recirculation system with heat exchanger;
- anti-shake switch-off system.
The operation of these systems is optimized by an electronic control system governed by a control unit.
An understanding of the operating logic of the control unit gives an overall picture of the entire GROUP 10 system Characteristic of working principle 1060 DIESEL FUEL INJECTION.
Evaporation
Also called vaporization, this is the passage of a body from the liquid state to the gaseous state.
It occurs at any temperature, but, when all other conditions are the same, all the more slowly the lower the temperature.
DUCTILE OR SPHEROIDAL CAST IRON
Cast iron is referred to as ductile or spheroidal when, due to the addition of cerium and magnesium, globules or spheres of carbon at the graphite stage are contained in a mainly ferrite matrix. All the mechanical and technological properties of the metal are improved so it can be forged, welded and machined.
Its applications are very wide, because - unlike normal cast iron - it offers appreciable strength and percentage lengthening values.
DUCTILE OR SPHEROIDAL CAST IRON
Cast iron is referred to as ductile or spheroidal when, due to the addition of cerium and magnesium, globules or spheres of carbon at the graphite stage are contained in a mainly ferrite matrix. All the mechanical and technological properties of the metal are improved so it can be forged, welded and machined.
Its applications are very wide, because - unlike normal cast iron - it offers appreciable strength and percentage lengthening values.
HARDENED AND TEMPERED STEEL
Heat treatment applied to special steels to improve their mechanical characteristics: it consists of hardening, followed by tempering to induce a significant increase in toughness of the material.
DUCTILE OR SPHEROIDAL CAST IRON
Cast iron is referred to as ductile or spheroidal when, due to the addition of cerium and magnesium, globules or spheres of carbon at the graphite stage are contained in a mainly ferrite matrix. All the mechanical and technological properties of the metal are improved so it can be forged, welded and machined.
Its applications are very wide, because - unlike normal cast iron - it offers appreciable strength and percentage lengthening values.
CONSTRUCTION
Direct injection turbodiesel engine without precombustion chamber, 4 cylinders in line, 1910 c.c., twin-mass flywheel, four valves per cylinder with hydraulic tappets, two overhead camshafts with geared power transmission, supercharged with variable geometry turbocharger and intercooler, Bosch Common Rail EDC-16C8 electronic fuel injection system.
PWM PULSE WIDTH MODULATION
A fixed voltage with modulated amplitude frequency pulses generated by the ECU to operate the actuators. A PWM voltage consists of a series of single polarity square waves. The ECU varies wave duration in response to demand.
A, Off
B, On
C, Low resulting current
D, Medium resulting current
E, Maximum resulting current
Evaporation
Also called vaporization, this is the passage of a body from the liquid state to the gaseous state.
It occurs at any temperature, but all the more slowly the lower the temperature.
Evaporation
Also called vaporization, this is the passage of a body from the liquid state to the gaseous state.
It occurs at any temperature, but, when all other conditions are the same, all the more slowly the lower the temperature.
HARDENING
This is obtained when the structure of the metal at high temperature is harder and stronger than when cold.
Resonance
Phenomenon in which the amplitude of oscillations induced in a vibrating system tends, under particular conditions, to become intensified (amplified) beyond all limits.
PWM PULSE WIDTH MODULATION
A pulse width modulated current varies in proportion to the ratio between Wave and Space. The Wave-Space ratio is the relationship between periods when the power supply is on and periods when it is off. This ratio may be considered as a percentage, and this is the way the Duty Cycle is measured.
MISFIRE
This occurs when the mixture (air/fuel) inside the combustion chamber fails to spark.
The effect gives rise to unneven running, which is particularly discernible when idling or at low speed.
Unburnt fuel emerges from the exhaust as a result and this impairs catalytic converter duration.
PWM PULSE WIDTH MODULATION
A fixed voltage with modulated amplitude frequency pulses generated by the ECU to operate the actuators. A PWM voltage consists of a series of single polarity square waves. The ECU varies wave duration in response to demand.
A, Off
B, On
C, Low resulting current
D, Medium resulting current
E, Maximum resulting current
TEMPERING
Consists of heating to a temperature of < 720°Χ φολλοωεδ βψ σλοω χοολινγ, in order to attenuate the effects of the hardening without eliminating its effects.
The material thus returns to a condition as close as possible to a stable chemical-physical balance.
Sensor
This is a system which, stimulated by any form of energy, reacts by changing its state, hence one or more of its characteristics (resistivity, volume, temperature, etc.).
For example, a material which, immersed in a magnetic field, undergoes a change in its conductivity, is a sensor.
New-generation sensors are solid-state devices of microelectronic technology, which can read the environment and provide responses in the form of electrical signals for subsequent processing for final control actions.
They can measure forces, acceleration, pressures and temperatures of gases, liquids and solids, concentrations of gases such as nitric oxides, oxygen, etc.
Sensor
This is a system which, stimulated by any form of energy, reacts by changing its state, hence one or more of its characteristics (resistivity, volume, temperature, etc.).
For example, a material which, immersed in a magnetic field, undergoes a change in its conductivity, is a sensor.
New-generation sensors are solid-state devices of microelectronic technology, which can read the environment and provide responses in the form of electrical signals for subsequent processing for final control actions.
They can measure forces, acceleration, pressures and temperatures of gases, liquids and solids, concentrations of gases such as nitric oxides, oxygen, etc.
PWM PULSE WIDTH MODULATION
This is a fixed voltage with pulses of moduled amplitude and frequency generated by the ECU for the operation of the actuators. A supply with P.W.M. (Power Width Modulation) voltage consists of a series of square waves with single polarity, whose duration is varied by the ECU in response to demand.
A, Off
B, On
C, Low resulting current
D, Medium resulting current
E, Maximum resulting current
PWM PULSE WIDTH MODULATION
A pulse width modulated current varies in proportion to the ratio between Wave and Space. The Wave-Space ratio is the relationship between periods when the power supply is on and periods when it is off. This ratio may be considered as a percentage, and this is the way the Duty Cycle is measured.
SENSOR
This is a system which, stimulated by any form of energy, reacts by changing its state, hence one or more of its characteristics (resistivity, volume, temperature, etc.).
For example, a material which, immersed in a magnetic field, undergoes a change in its conductivity, is a sensor.
New-generation sensors are solid-state devices of microelectronic technology, which can read the environment and provide responses in the form of electrical signals for subsequent processing for final control actions.
They can measure forces, acceleration, pressures and temperatures of gases, liquids and solids, etc.
Viscosity
Property of matter whereby the particles of a body meet 'resistance' in sliding in relation to each other.
The value of the resistance or internal friction depends on the nature of the body, large in solids, very small in viscous liquids and non-existent in gases.
In liquids, viscosity decreases rapidly as temperature increases.
Viscosity
Property of matter whereby the particles of a body meet 'resistance' in sliding in relation to each other.
The value of the resistance or internal friction depends on the nature of the body, large in solids, very small in viscous liquids and non-existent in gases.
In liquids, viscosity decreases rapidly as temperature increases.
PWM PULSE WIDTH MODULATION
A pulse width modulated current varies in proportion to the ratio between Wave and Space. The Wave-Space ratio is the relationship between periods when the power supply is on and periods when it is off.
This ratio may be considered as a percentage, and this is the way the Duty Cycle is measured.
Resonance
Phenomenon in which the amplitude of oscillations induced in a vibrating system tends, under particular conditions, to become intensified (amplified) beyond all limits.
Current developments
This engine has a Bosch Motronic electronic injection system totally managed by an electronic control unit.
The power unit components are illustrated in the diagram below.
1, Fuel filler
2, Electric fuel pump
3, Fuel tank
4, Auxiliary drivebelt
5, Inlet manifold
6, Exhaust manifold
7, Cooling system pipes
8, Turbocharger
9, Power unit mounting
10, Exhaust pipe
11, Oxidizing catalytic converter
12. Catalytic pre-converter
13, Fuel filter
14, Fuel supply pipe
15, Fuel return pipe
Engine with 4 cylinders in line, 16 valves, 1242 cc., twin overhead camshaft with Bosch ME 7.3 H4 electronic injection-ignition.
POWER - 80 BHP EC at 5000 rpm
TORQUE - 11.6 kgm EC at 4000 rpm
CYLINDER ARRANGEMENT - 4 in line
BORE - 70.8 mm
STROKE - 78.86 mm
CAPACITY - 1242 cc
CYLINDER HEAD - aluminium
CRANKCASE - cast iron
CRANKSHAFT - in ductile cast iron with 8 counterweights and 5 main bearings with torsional damper
TIMING SYSTEM - two overhead camshafts with gear drive and play take-up from the intake shaft to the exhaust shaft, hydraulic tappets, 4 valves per cylinder
FUEL SYSTEM - returnless system with Bosch phased sequential injection
IGNITION - fully electronic, inductive discharge with lost spark
EMISSION CONTROL DEVICES - trivalent catalytic converter
LUBRICATION - forced via vane-type in-line gear pump.
COOLING: liquid with forced circulation via a centrifugal pump and sealed circuit; Radiator and additional expansion tank.
Sensor
This is a system which, stimulated by any form of energy, reacts by changing its state, hence one or more of its characteristics (resistivity, volume, temperature, etc.).
For example, a material which, immersed in a magnetic field, undergoes a change in its conductivity, is a sensor.
New-generation sensors are solid-state devices of microelectronic technology, which can read the environment and provide responses in the form of electrical signals for subsequent processing for final control actions.
They can measure forces, acceleration, pressures and temperatures of gases, liquids and solids, concentrations of gases such as nitric oxides, oxygen, etc.
Sensor
This is a system which, stimulated by any form of energy, reacts by changing its state, hence one or more of its characteristics (resistivity, volume, temperature, etc.).
For example, a material which, immersed in a magnetic field, undergoes a change in its conductivity, is a sensor.
New-generation sensors are solid-state devices of microelectronic technology, which can read the environment and provide responses in the form of electrical signals for subsequent processing for final control actions.
They can measure forces, acceleration, pressures and temperatures of gases, liquids and solids, concentrations of gases such as nitric oxides, oxygen, etc.
SPECIFCATIONS
Engine: 5 cylinders in line, 20 valves, 2446 cc, petrol with Bosch ME 3.1 electronic integrated injection-ignition.
POWER - 125 kW (170 CV)
TORQUE - 221 Nm (22.5 kgm)
CYLINDER ARRANGEMENT - 5 in line
BORE - 83 mm
STROKE - 90.4 mm
CAPACITY - 2446 cc
CYLINDER HEAD - in tempered and hardened aluminium
CRANKCASE - in laminar cast iron
CRANKSHAFT - in ductile cast iron
TIMING SYSTEM - two overhead camshafts, 4 valves per cylinder, hydraulic tappets
FUEL SYSTEM - returnless system with Bosch injection
IGNITION - individual coils per cylinder
EMISSION CONTROL DEVICES - Euro 3 with additional catalytic converter
LUBRICATION - forced with gear pump
COOLING: liquid with forced circulation via a centrifugal pump and sealed circuit; Radiator and additional expansion tank.
Technical specifications
Direct injection turbodiesel engine without precombustion chamber, 4 cylinders in line, 1910 c.c., two valves per cylinder, overhead camshaft, supercharged with turbocharger and intercooler, Bosch Common Rail EDC-15C electronic fuel injection system.
POWER - 59 kW (80CV EC) at 4000 rpm
TORQUE - 19.6 daNm (20 kgm EC) at 1500 rpm
CYLINDER ARRANGEMENT - 4 in line
BORE - 82 mm
STROKE - 90,4 mm
CAPACITY - 1910cc
CYLINDER HEAD - aluminium alloy
CRANKCASE - closed deck cast iron
CRANKSHAFT - in ductile cast iron with 8 counterweights and 5 main bearings with torsional damper
TIMING GEAR: one overhead belt-driven camshaft, 2 valves per cylinder
INJECTION SYSTEM - Bosch EDC 15C common rail Unijet
TURBOCHARGING SYSTEM - Fixed geometry turbocharger
EMISSION CONTROL DEVICES: oxidising catalytic converter with pre-converter, electric EGR
LUBRICATION - forced, with in-line gear pump
COOLING: liquid with forced circulation via a centrifugal pump and sealed circuit; Radiator and additional expansion tank.
Engine operation is ensured by the following systems:
- fuel system;
- air supply system;
- engine cooling system;
- exhaust system with catalytic converter;
- oil vapour recirculation system;
- E.G.R. exhaust gas recirculation system
- electric/electronic system.
Engine operation is ensured by the following systems:
- fuel supply system
- air supply system;
- exhaust system with catalytic converter
- fuel vapour recirculation system.
- engine cooling system
The operation of these systems is optimized by an electronic control system governed by a control unit (see subunit 1056).
General view
1, Engine and power unit
2, Fuel tank and pipes
3, Pump(s) and fuel circuit devices
4, Engine air supply circuit
5, Petrol injection system
6, Exhaust pipes and silencers
7, Emission control system
8, Engine lubrication system
9, Engine cooling system
Viscosity
Property of matter whereby the particles of a body meet 'resistance' in sliding in relation to each other.
The value of the resistance or internal friction depends on the nature of the body, large in solids, very small in viscous liquids and non-existent in gases.
In liquids, viscosity decreases rapidly as temperature increases.
Viscosity
Property of matter whereby the particles of a body meet 'resistance' in sliding in relation to each other.
The value of the resistance or internal friction depends on the nature of the body, large in solids, very small in viscous liquids and non-existent in gases.
In liquids, viscosity decreases rapidly as temperature increases.
Devices fitted
These engines are fitted with the following emissions control devices:
- exhaust system with catalytic converter and lambda probe;
- fuel vapour recirculation system.
- crankcase vapour/gas recirculation system.
Hardened and tempered steel
Heat treatment applied to special steels to improve their mechanical characteristics: it consists of hardening, followed by tempering to induce a significant increase in toughness of the material.
Tempering: consists of heating to a temperature of < 720°Χ φολλοωεδ βψ σλοω χοολινγ, in order to attenuate the effects of the hardening without eliminating its effects.
The material thus returns to a condition as close as possible to a stable chemical-physical balance.
Hardening: this is obtained when the structure of the metal at high temperature is harder and stronger than when cold.
fuel supply system
It is the returnless type with an electric fuel pump immersed in the tank and a casing which incorporates the voltage regulator, the fuel gauge and the filter (for further details see 1040).
Engine with 4 cylinders in line, 16 valves, 1596 cc, twin overhead camshaft with IAW 5NF integrated electronic injection/ignition system
BORE - 80.5 mm
STROKE - 78.4 mm
CAPACITY - 1596 cc
CYLINDER HEAD - aluminium
CRANKCASE - cast iron
CRANKSHAFT - in ductile cast iron with 8 counterweights and 5 main bearings with torsional damper
TIMING SYSTEM - two overhead camshafts, mechanical tappets, 2 valves per cylinder
FUEL SYSTEM - returnless system with Marelli 5NF phased sequential injection, pintless Pico inejctors
IGNITION - fully electronic, inductive discharge with lost spark
EMISSION CONTROL DEVICES - trivalent catalytic converter with two lambda probes (EOBD)
LUBRICATION - forced with gear pump
COOLING: liquid with forced circulation via a centrifugal pump and sealed circuit; Radiator and additional expansion tank.
CURRENT DEVELOPMENTS
This engine is fitted with HITACHI digital electronic ignition system with static advance and distribution integral with a phased, multiple, intermittent electronic fuel injection system.
STRUCTURE
The unit comprises the engine and all the systems required for its operation:
- fuel supply system
- air supply system;
- exhaust system with catalytic converter and lambda probes;
- oil vapour recirculation system
- fuel vapour recovery system;
- engine cooling system
The operation of these systems is optimized by an electronic control system governed by a control unit.
An understanding of the operating logic of the control unit gives an overall picture of the entire GROUP 10 system Characteristic of working principle 1056 PETROL INJECTION SYSTEM.
Closed-deck
This indicates the type of assembly of the cylinder liners in the cylinder block; in this case the two components are integral in the top.
Air supply system
Air supply system with plastic inlet manifold and large air filter casing to limit inlet noise (for further details see 1048 and 1072 ).
Engine operation is ensured by the following systems:
- fuel supply system
- air supply system;
- exhaust system with catalytic converter
- fuel vapour recirculation system.
- lubrication system;
- engine cooling system
- The operation of these systems is optimized by an electronic control system governed by a control unit (see subunit 1056).
PERFORMANCE
This engine is able to provide the following performance:
- maximum power 96 kW EC at 6300 rpm
- maximum torque 164 Nm EC at 3800 rpm.
Condensation
This the reverse of evaporation, i.e. when a substance passes from the vapour state to the liquid state; it takes place by compression or cooling.
Exhaust system
The exhaust system is equipped with a system for post-treating exhaust gases with a lambda probe and catalytic converter fitted in the engine bay (for further details see 1076).
General view
The engine assembly components are illustrated in the diagram below.
1, Engine and power unit
2, Fuel tank and pipes
3, Pump(s) and fuel circuit devices
4, Engine air supply circuit
5, Petrol injection system
6, Emission control system (petrol vapours)
7, Engine cooling
8, Electronic injection/ignition system
DEVICES ADOPTED
These engines are fitted with the following emissions control devices:
- exhaust system with catalytic converter and lambda probe;
- crankcase vapour/gas recirculation system;
- fuel vapour recirculation system.
Evaporation
Also called vaporization, this is the passage of a body from the liquid state to the gaseous state.
It occurs at any temperature, but, when all other conditions are the same, all the more slowly the lower the temperature.
Emission control system
The following emission control systems are fitted on this model:
- Exhaust emission control system with a three-way catalytic converter and Lambda sensor;
- crankcase vapour/gas recirculation system;
- fuel evaporation control system, (for further details see 1080).
fuel supply system
It is the returnless type with an electric fuel pump immersed in the tank and a casing which incorporates the voltage regulator, the fuel gauge and the filter (for further details see 1040).
Structure
The unit comprises the engine and all the systems required for its operation:
- fuel supply system
- air supply system;
- exhaust system with catalytic converter
- oil vapour recirculation system
- engine cooling system
The operation of these systems is optimized by an electronic control system governed by a control unit.
An understanding of the operating logic of the control unit gives an overall picture of the entire GROUP 10 system (see 1056).
DUCTILE OR SPHEROIDAL CAST IRON
Cast iron is referred to as ductile or spheroidal when, due to the addition of cerium and magnesium, globules or spheres of carbon at the graphite stage are contained in a mainly ferrite matrix. All the mechanical and technological properties of the metal are improved so it can be forged, welded and machined.
Its applications are very wide, because - unlike normal cast iron - it offers appreciable strength and percentage lengthening values.
Cooling system
Forced circulation with a centrifugal vane pump (for further details see 1088).
Air supply system
Air supply system with plastic inlet manifold and large air filter casing to limit inlet noise (for further details see 1048).
View of SYSTEM COMPONENTS
The main system components are illustrated in the diagram below.
1, Engine and power unit
2, Fuel tank and pipes
3, Pump(s) and fuel circuit devices
4, Engine air supply circuit
5, Petrol injection system
6, Exhaust pipes and silencers
7, Emission control system
8, Engine lubrication system
9, Engine cooling system
Resonance
Phenomenon in which the amplitude of oscillations induced in a vibrating system tends, under particular conditions, to become intensified (amplified) beyond all limits.
Exhaust system
The exhaust system is equipped with a system for post-treating exhaust gases with twin lambda probes, one upstream and one downstream of the catalytic converter fitted in the engine bay (for further details see 1076).
Construction
Engines with 4 cylinders in line, 16 valves, 1747 cc, overhead cam, electrohydraulic variable valve timing, counter-rotating shafts.
Sensor
This is a system which, stimulated by any form of energy, reacts by changing its state, hence one or more of its characteristics (resistivity, volume, temperature, etc.).
For example, a material which, immersed in a magnetic field, undergoes a change in its conductivity, is a sensor.
New-generation sensors are solid-state devices of microelectronic technology, which can read the environment and provide responses in the form of electrical signals for subsequent processing for final control actions.
They can measure forces, acceleration, pressures and temperatures of gases, liquids and solids, concentrations of gases such as nitric oxides, oxygen, etc.
Emission control system
The following emission control systems are fitted on this model:
- Exhaust emission control system with a three-way catalytic converter and twin Lambda probes;
- crankcase vapour/gas recirculation system;
- fuel evaporation control system, (for further details see 1080).
Viscosity
Property of matter whereby the particles of a body meet 'resistance' in sliding in relation to each other.
The value of the resistance or internal friction depends on the nature of the body, large in solids, very small in viscous liquids and non-existent in gases.
In liquids, viscosity decreases rapidly as temperature increases.
Cooling system
Forced circulation with a centrifugal vane pump (for further details see 1088).
The power unit components are illustrated in the diagram below.
1, Fuel filler
2, Electric fuel pump
3, Fuel tank
4, Auxiliary drivebelt
5, Inlet manifold
6, Exhaust manifold
7, Cooling system pipes
8, Turbocharger
9, Power unit mounting
10, Exhaust pipe
11, Oxidizing catalytic converter
12. Catalytic pre-converter
13, Fuel filter
14, Fuel supply pipe
15, Fuel return pipe
Technical specifications
Direct injection turbodiesel engine without precombustion chamber, 4 cylinders in line, 1910 c.c., two valves per cylinder, overhead camshaft, supercharged with turbocharger and intercooler, Bosch Common Rail EDC-15C electronic fuel injection system.
POWER - 85 kW (110 CV EC) at 4000 rpm
TORQUE - 25.5 daNm (26 kgm EC) at 2000 rpm
CYLINDER ARRANGEMENT - 4 in line
BORE - 82 mm
STROKE - 90,4 mm
CAPACITY - 1910cc
CYLINDER HEAD - aluminium alloy
CRANKCASE - closed deck cast iron
CRANKSHAFT - in ductile cast iron with 8 counterweights and 5 main bearings with torsional damper
TIMING GEAR: one overhead belt-driven camshaft, 2 valves per cylinder
INJECTION SYSTEM - Bosch EDC 15C common rail Unijet
TURBOCHARGING SYSTEM - Variable geometry turbocharger with intercooler
EMISSION CONTROL DEVICES: oxidising catalytic converter with pre-converter, electric EGR
LUBRICATION - forced, with in-line gear pump
COOLING: liquid with forced circulation via a centrifugal pump and sealed circuit; Radiator and additional expansion tank.
Engine operation is ensured by the following systems:
- fuel system;
- air supply system;
- engine cooling system;
- exhaust system with catalytic converter;
- oil vapour recirculation system;
- E.G.R. exhaust gas recirculation system
- electric/electronic system.
Parts & tools for this job For 2001 Fiat Stilo
- PARTEngine gasket setSearch: Fiat Stilo 2001 engine gasket set
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLFeeler gauge setSearch: feeler gauge set
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