New Volvo Penta D9 Heavy Duty: A new generation of reliable marine diesels with low emissions

Volvo Penta introduces a new range of powerful, compact and fuel-efficient marine engines in the 9-litre range. The new D9 heavy duty is available in three power settings for propulsion – 300, 350 and 425 horsepower – and as complete marine generating sets.
The new D9 heavy duty is a inline-six marine diesel engine with a 9.4 litres cylinder volume. With compact installation dimensions, high torque and electronic controls, the new D9 replaces both the 7 and 10 litre engines for propulsion and marine auxiliaries. The D9 heavy duty is very suitable for inland ferries, small passenger ferries, fishing boats and different types of workboats.

“The modernisation of Volvo Penta's product range that D9 and D12 represent will mean a lot of positive aspects to professional users around the world, not least because of the low fuel consumption and the good emission values,” says Gerard Törneman, Head of Product Planning for marine commercial engines at Volvo Penta.

The D9 heavy duty will be introduced at the SMM marine trade fair in Hamburg when it opens on 28 September 2004.

New turbo with pulse charging
The D9 heavy duty is equipped with a completely new centre-mounted, twin-entry turbo which allows pulse charging. In other words, the power in each exhaust pulse can be used to provide pulse pressure. With a turbo, large cylinder capacity and electronically controlled unit injectors the D9 heavy duty provides a quick response even at low engine speeds.

High fuel efficiency with electronic engine management
EMS 2 is an electronic engine management system developed by Volvo Penta to meet coming emission requirements. The system monitors and regulates a large number of components in the engine and the engine’s fuel requirements are analysed with high precision up to 100 times a second.

EMS 2 optimises performance and fuel efficiency but also results in increased operational safety and better protection for the engine.

“With the help of EMS 2 we have succeeded in combining low fuel efficiency with low emission values of NOx particles and greenhouse gases,” says Gerard Törneman.
New monitoring system
The D9 can be equipped with a completely new monitoring and management system that results in optimal capacity usage and enhanced safety in the engine room. This system is called the Engine Interface Unit (EIU) and meets the requirements for monitoring and communication demanded of larger vessels and unmanned engine rooms.

The EUI makes it easy to integrate and manage multiple installations in the form of propulsion systems and generator units.

Compact but service-friendly design
The D9 heavy duty is a compact and robust engine that requires only marginally more space in the engine room than Volvo Penta’s 7-litre engine. The basic design is very robust with a sturdy engine block and fully-cast cylinder head for maximum reliability and low vibration.

All important service points are easily accessed to facilitate daily inspections.

Approved for rated installations
All configurations of the new D9 heavy duty are type-approved by leading classification societies. All vital parts such as the electrical system, crankshaft and fuel system are designed and manufactured in accordance with current classification requirements.

Low emissions
The D9 heavy duty produces low exhaust emissions as a consequence of effective charge-air cooling, high-pressure in the fuel injection and electronic engine management. The engine will meet the general environmental requirements for Europe and the USA in the coming years. The D9 meets Volvo Penta's very stringent requirements on smoke.

Extensive test programme
The D9 heavy duty has been subjected to an extensive test programme both in a laboratory environment and within a number of application areas. Single and twin installations have been tested under all imaginable conditions. During the test period the D9 heavy duty has covered a distance equal to 10 trips around the globe.

Based on the successful D12 engine
The D9 has much in common with the successful D12 engine. More than 500 000 D12 engines have been installed in trucks, boats, ferries and working machines all over the world.

The fact that Volvo Penta’s marine six-cylinder engines have much in common means that servicing and maintenance are done in much the same way irrespective of the engine model. Furthermore, many of the filters and parts are common and this facilitates parts management.

Each engine is tested individually
The D9 has been developed jointly for the entire Volvo Group. This offers considerable harmonisation benefits and the potential for using the latest in diesel engine technology. The engine is produced in Volvo´s automated engine plant where the assembly line has been designed so that it can also incorporate the marine modifications and thus produce high and consistent quality.

Each marine engine supplied to a shipyard is first individually tested at Volvo Penta’s plant in Gothenburg, Sweden. During the tests the engine is equipped in the same manner as it will be when onboard ship.
Technical data

D9 for marine propulsion:
Engine designation: D9 MH                            D9 MH                            D9 MH
Crankshaft output: 300 hp/221 kW                355 hp/261 kW              425 hp/313 kW
Maximum torque    1,500 Nm                          1,500 Nm                       1,650 Nm
Cubic capacity:     9.4 litres                           9.4 litres                         9.4 litres
Configuration: Straight-six marine diesel with turbo
Weight excl. transm.: 1,075 kg                      1,075 kg                         1,075 kg
Rating*: 1 1 2
Emissions: Will meet the general environmental requirements introduced in the USA in 2004 and will meet the requirements to be introduced in Europe in 2007.
*) 1 = Heavy duty commercial
    2 = Medium duty commercial

D9 MG for marine generating sets:
Output, 60 Hz: 278 kW
Output, 50 Hz: 247 kW
Emissions: Will meet the general environmental requirements introduced in the USA in 2004 and will meet the requirements to be introduced in Europe in 2007.

For further information, please contact Ann-Charlotte Emegård, AB Volvo Penta, phone:
+46 31 66 84 18, E-mail: