Specifications

2.4 JTD 20V

SYSTEM DETAILS

Devices adopted

This fuel injection system used a high injection pressure under electronic control and a fuel delivery method known as a pilot injection that is electronically controlled by the electronic injection system via the injector (instead of being controlled by the injection pump as in previous direct injection engines).

Pressure level is the basic parameter for optimising fuel consumption and exhaust fume levels.

A pilot injection makes it possible to preheat the combustion chamber to avoid the pressure peak causd by rapid combustiojn and ensure smoother running.

Injection pressure regulation is made possible by the constructional features of the system, which is equipped with separate pressure pump and injectors, both managed by a control unit. In this way, injection pressure is independent of engine rotation speed.

Performance

The main features of the fuel feed system are as follows:

• high injection pressure (up to 1400 bars);
• injection pressure modulable from 150 to 1400 bars under all engine service conditions
• introduction of fuel up to 100 mm³/stroke within a speed range of 100 to 6000 rpm
• precise injection control in terms of advance and duration
• one or two pilot injections before TDC managed on the basis of rpm and engine load that allow pressure drift in the combustion chamber to be reduced to lower noise levels.

2.0 TB

SYSTEM DETAILS

Devices adopted

The fuel supply system is the dual pipe type (one supply pipe and one return pipe) with the filter and pressure regulator built into the pump assembly.

FUEL SUPPLY SYSTEM

The figure shows the fuel system.

• 1 Fuel tank.
• 2 Submerged fuel assembly complete with level gauge control.
• 3 Fuel filler pipe.
• 4 Inertia switch.
• 5 Fuel manifold.
• 6 Injectors [DF1056].

3.0 V6, 3.2 V6

SYSTEM DETAILS

Devices adopted

The fluid feed system is returnless, i.e. a single pipe delivers fuel from the fuel pump submerged in the tank to the engine.

This:

• minimises the possibility of the vehicle catching fire in case of an accident.
• reduces fuel vapour emissions to the atmosphere.

The fuel tank is located in front of the rear axle. It is made out of plastic with high mechanical strength.

The fuel pump is enclosed in the cradle that also incorporates:

• a fuel pressure regulator.
• a fuel level gauge.
• a fuel filter.

The system is equiped with an inertia switch that cuts off the fuel supply from the fuel pump if the vehicle crashes.

FUEL SUPPLY SYSTEM

The figure shows the fuel feed system.

• 1 Fuel tank
• 2 Submerged fuel assembly complete with level gauge control
• 3 Fuel filler pipe
• 4 Inertia switch.
• 5 Fuel manifold
• 6 Injectors [DF1056].

2.4 JTD 10V

SYSTEM DETAILS

Devices adopted

This fuel injection system used a high injection pressure under electronic control and a fuel delivery method known as a pilot injection that is electronically controlled by the electronic injection system via the injector (instead of being controlled by the injection pump as in previous direct injection engines).

Pressure level is the basic parameter for optimising fuel consumption and exhaust fume levels.

A pilot injection makes it possible to preheat the combustion chamber to avoid the pressure peak causd by rapid combustiojn and ensure smoother running.

Injection pressure regulation is made possible by the constructional features of the system, which is equipped with separate pressure pump and injectors, both managed by a control unit. In this way, injection pressure is independent of engine rotation speed.

Performance

The main features of the fuel feed system are as follows:

• high injection pressure (up to 1350 bars);
• injection pressure modulable from 150 to 1350 bars under all engine service conditions
• introduction of fuel up to 100 mm³/stroke within a speed range of 100 to 6000 rpm
• precise injection control in terms of advance and duration
• A pilot injection before TDC managed on the basis of rpm and engine load that allows pressure drift in the combustion chamber to be reduced to lower noise levels.

2.4 20V

SYSTEM DETAILS

Devices adopted

The fuel supply system is the returnless type, i.e. with a single supply pipe from the fuel pump, submerged in the tank, to the engine.

FUEL SUPPLY SYSTEM

The figure shows the fuel system

• 1 Fuel tank.
• 2 Submerged fuel assembly complete with level gauge control.
• 3 Fuel filler pipe.
• 4 Inertia switch.
• 5 Fuel manifold.
• 6 Injectors [DF1056].