280

260

240

220

200

180

160

140

120

r/min200018001600140012001000 2200

210

200

190

180

1500

1600

1700

1300

1100

1400

1200

800

1000

900

Power, kW

Net output according to:· ISO 1585· Dir. 89/491/EEC· ECE Reg 85

Spec. Fuelconsumptiong/kWh

Torque, Nm

192 g/kWh EC01

Economy 1200-1800 r/min

250 kW 1900 r/min(340 hp metric)

1600 Nm 1200-1400 r/min

Fact SheetEngine

D9A340, EM-EC01

The D9A340 is a straight, six-cylinder, 9.4 litre 340 hpmetric diesel engine with a turbo compressor and intercooler.The engine meets EU regulations regarding exhaust andnoise emissions according to Euro 3.

The D9340 is based on the same fundamental concept asthe larger D12D engine and has an overhead camshaft, fourvalves per cylinder, unit injectors and fitted cylinder head.The design has a very low weight.The engine functions are controlled completelyelectronically by Volvo’s EMS (Engine Management Sys-tem), which contributes to low fuel consumption and lowexhaust emissions. The system also provides advancedcapabilities for diagnostics and troubleshooting.The highly efficient combustion is achieved by the highcharge pressure from the turbo compressor combined withprecision-controlled injection.The transmission is on the flywheel side of the engine,giving the engine a compact installation and allowing a rearpower take-off to be installed.The D9A340 generates high torque at low engine speeds,resulting in very good lugging capability. This, combinedwith a wide engine speed range, gives the engine very gooddrivability. The D9A340 is characterised by the followingfeatures:• Electronic engine management (EMS) with precise fuel

injection results in low fuel consumption and low emis-sion values.

• Electronically controlled fuel injection with centrallylocated vertical unit injectors.

• Electronic oil level transmitters which provide readingson the driver information display.

• Maximum torque in a wide range of engine speeds prov-ides good driving characteristics and low fuelconsumption.

• High engine braking power with VEB*.• Engine rear power take-off for directly running a

hydraulic pump or flange.

Specification

Type designation ............................D9A340, EM-EC01Max. power at 1900 rpm ......... 250 kW (340 hp metric)Max. rpm ...................................................... 2100 rpmMax. torque at 1200-1400 rpm ...................... 1600 NmNo. of cylinders .......................................................... 6Bore ................................................................. 120 mmStroke .............................................................. 138 mmDisplacement ................................................... 9.4 dm3

Compression ratio ...............................................18.5:1Exhaust brake output at 2400 rpm ................... 140 kWEngine brake output (VEB)* at 2400 rpm ......... 264 kWEconomy rpm ...................................... 1200-1800 rpmEngine oil capacity, including filters ....................... 26 lNo. of oil filters ............................ 2 full-flow, 1 bypassCooling system, total volume................................. 36 lWeight ............................................................... 865 kg*VEB (Volvo Engine Brake) is available as a variant.

2001-09-14 ENG Version 01

Fact SheetEngine

D9A340, EM-EC01

Symmetrical injection

results in more efficient

combustion

The D9A is equipped with unitinjectors, which allow high injectionpressures.The high pressure is createdmechanically via a rolling rocker arm,which is driven by the overheadcamshaft. The profile of the injectioncam is matched to the injector toprovide sufficient lift.The cylinder head has only one com-mon fuel channel to the injectors andinlet ports, and valves are of largediameter to give a low loss of pressure.This design solution results in preciseinjection and low fuel consumptionwith high output and low emissions.

Electronic engine control

integrated in the vehicle’s

electronic system

The D9A engine is equipped withVolvo EMS (Engine Management Sys-tem), which means that the engine’sfunctions are controlled completelyelectronically. EMS provides efficientengine control and advancedcapabilities for diagnostics andtroubleshooting.The engine control unit is connectedto the vehicle electronic system’s datalinks, and the information is presentedon an easy-to-read display on thedashboard.

Transmission with

compact installation

The transmission is located at the rearof the engine. The transmission drivesthe steering servo pump, fuel pump,camshaft and air compressor. Thecooling pump, fan, generator and ACcompressor are located at the front ofthe engine and driven by multi-groove,Poly-V.This design solution makes it possibleto locate a power take-off at the rearof the engine. The location of thetransmission additionally results in acompact installation.

VEB – reliable engine

braking with high power

The D9A can be equipped with asteplessly variable Volvo Engine Brake(VEB), which is a compression enginebrake. The design is a Volvo patentwhich makes maximum use of theengine’s compression stroke to producehigh braking power.VEB can be used together with thecruise control to maintain high averagespeed with good operating economy.VEB reduces wear on the ordinarywheel brakes. In addition, the systemhas low weight in comparison withother supplementary brakes.

Power take-off with high

capacity

The Volvo D9A can be equipped withan engine-driven, clutch-independentpower take-off to operate a directlymounted hydraulic pump or flange.The power take-off can transfer up to1000 Nm in continuous operation. Itis located at the rear of the enginetogether with the transmission. Thepower take-off is designed for hightorque take-offs with high reliability.

Four-valve engineering

and overhead camshaft

The D9A has four valves per cylinderand separate inlet and exhaust portswith transverse flow. This results inrapid gas exchange. The combustionchamber is designed to provide anoptimum combustion process.The design of the inlet port and thelocation of the valves in the cylinderhead minimise the rotational velocityof the inlet air, so that the pressuredrop is small. The degree of gas fillingbecomes high, contributing to highefficiency.