Engine – Overview

Design and Function

Applies to: B5244S4, B5244S5, B5254T3, B5254T7

Engine B5254 is a 5 cylinder 20 valve turbocharged engine with a cylinder capacity of 2.5 dm³. Engine B5244 is a 5 cylinder 20 valve naturally aspirated engine with a cylinder capacity of 2.4 dm³.

Visually there is no different between the engines. The difference is in specific components which affect the turbocharger (TC) and natural aspiration. There are different transmission combinations for the engine. The 5 and 6 speed manual transmission are called M56 and M66. The automatic transmissions are AW55-51 and AW50AWD.

The engine and transmission are pendulum mounted. A mounting on the engine is linked via a rubber bushing to the side member and an engine mounting on the transmission.

Applies to: 2007–2010; D5244T13, D5244T8, D5244T9

The engine has been developed by Volvo.

The engine is a transverse five cylinder direct injection turbocharged diesel engine. The engine has double overhead camshafts and 20 valves.

The engine is manufactured in several versions with different outputs/torque levels. These are described in the engine's mechanical specifications, see INFORMATION/PRODUCT SPECIFICATIONS/Specifications, mechanical.

The engine has a Bosch common rail injection system, where the diesel pump is powered directly by the intake camshaft. Injection occurs via the injectors using solenoids. The fuel dosage is electronically regulated to give reliable starts and restarts.

The engine has coolant cooled Exhaust Gas Recirculation (EGR). The engine has a stepless variable swirl system located on the cylinder head.

The engine has a turbocharger (TC) with variable turbine geometry (Variable Nozzle Turbine, VNT) and charge air cooling. To prevent icing, the crankcase ventilation gases must be heated.

Applies to S60, V70 (00-08), V70XC (-07), XC90

A water heated twin wall pipe, encased by coolant, produces a more even temperature and safer function.

Applies to other models

The crankcase ventilation is electrically heated to produce a more even temperature and safer function.

The engine is equipped with a catalytic converter. It is located immediately after the turbocharger. This means that the catalytic converter quickly reaches the correct operating temperature after start.

After the catalytic converter there is a particle filter. This operates using the through flow principle. The system uses heated oxygen sensors and temperature and differential pressure sensors for control and monitoring.

Diagnostics are carried out via the data link connector (DLC).

Applies to: 2008–2010; D4204T

D4204T has been developed in a collaboration between Ford and Peugeot.

D4204T2 has been adapted for the French market to satisfy the French tax classification 7CV. The adaptation is located in the software for the engine control module (ECM).

The engine is a transverse, four cylinder turbo diesel engine. It has twin overhead camshafts and 16 valves.

D4204T has a maximum output of 100 kW (136 bhp) and a torque of 340 Nm.

D4204T2 has a maximum output of 96 kW (130 bhp). The torque is the same, 340 Nm.

The exhaust camshaft is powered via a toothed belt. The intake camshaft is powered by the exhaust camshaft via a short roller chain.

The valves are actuated via roller rocker arms with low friction and hydraulic valve clearance equalization. The engine has a Siemens common rail fuel injection system, where the diesel pump is powered directly by the exhaust camshaft. Injection takes place via injectors using piezoelectric elements. Fuel dosing is regulated electronically.

The cylinder block is made of cast iron with cast cylinder sleeves. The engine has a two-piece cylinder head made of aluminum. It is designed in accordance with the cross-flow principle.

The engine has a turbocharger (TC) with variable turbine geometry and charge air cooling.

The engine has a two-way catalytic converter. This can cope with a fuel mixture with 5% RME (Rape Methyl Ester). The engine satisfies the Euro 3 emissions regulations.

The engine has a two mass flywheel.

Applies to S40 (04-), V50, C30 and C70 (06-)

The fuel system includes an additive system whose job it is to calculate and control the amount of additive supplied to the main fuel tank whenever fuel (diesel) is added so as to ensure that the emissions requirement can be met.

For information on the engine control module (ECM), sensors, and valves, see Design and Function, Engine Control Module (ECM).

Applies to: 2011–2013; D5204T, D5204T5

The engine has been developed by Volvo and is a transverse five cylinder direct-injected turbocharged diesel engine. It has double overhead camshafts driven by a timing belt and 20 valves.

The engine features a Bosch Common Rail injection system, where the diesel pump is driven directly by the inlet camshaft. Injection takes place via injection valves with piezo injectors.

The turbo system consists of a turbocharger.

The engine has coolant-cooled return of the exhausts (EGR, Exhaust Gas Recirculation).

The engine features a catalytic converter located directly after the turbocharger.

There is a particle filter after the catalytic converter.

For control and monitoring, the system features heated oxygen sensor as well as temperature sensors and differential pressure sensors.

Diagnostics are carried out via the data link connector (DLC).

D5204T2

D5204T2 has engine code 52.

For information about power, see Specifications, mechanical (Engine)