Pumpe-duse
Encyclopedia
The Unit Pump system is a modular high-pressure diesel injection system, which is closely related to the Unit Injector
system UI, and is designed for use in commercial vehicle
diesel engine
s.
The systems use an individual injection pump
mounted on the engine block for each cylinder so it is primarily designed for OHV or "cam in the block" engines. The fuel pumps are driven by an extra camshaft
lobe where each pump unit is connected to the injector via a short precise length high-pressure fuel line as opposed to Unit Injector
systems which combines both a pump and an injector element in a compact unit.
Both systems feature electronically controlled fuel solenoids for precise timing and the injection of fuel quantity is variably adjusted for each cylinder.
and Western Star by Detroit Diesel
made MBE 4000 engine
Unit Injector
Unit Injector is an integrated direct fuel injection system for diesel engines, combining the injector nozzle and the injection pump in a single component...
system UI, and is designed for use in commercial vehicle
Commercial vehicle
A commercial vehicle is a type of motor vehicle that may be used for transporting goods or passengers. The European Union defines "commercial motor vehicle" as any motorised road vehicle, which by its type of construction and equipment is designed for, and capable of transporting, whether for...
diesel engine
Diesel engine
A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...
s.
The systems use an individual injection pump
Injection pump
An Injection Pump is the device that pumps fuel into the cylinders of a diesel engine or less typically, a gasoline engine. Traditionally, the pump is driven indirectly from the crankshaft by gears, chains or a toothed belt that also drives the camshaft on overhead-cam engines . It rotates at half...
mounted on the engine block for each cylinder so it is primarily designed for OHV or "cam in the block" engines. The fuel pumps are driven by an extra camshaft
Camshaft
A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part.-History:An early cam was built into Hellenistic water-driven automata from the 3rd century BC. The camshaft was later described in Iraq by Al-Jazari in 1206. He employed it as part of his automata,...
lobe where each pump unit is connected to the injector via a short precise length high-pressure fuel line as opposed to Unit Injector
Unit Injector
Unit Injector is an integrated direct fuel injection system for diesel engines, combining the injector nozzle and the injection pump in a single component...
systems which combines both a pump and an injector element in a compact unit.
Both systems feature electronically controlled fuel solenoids for precise timing and the injection of fuel quantity is variably adjusted for each cylinder.
Applications
- Known commercial vehicles manufacturers using the system are MackMack TrucksMack Trucks is an American truck-manufacturing company and a former manufacturer of buses and trolley buses. A wholly owned subsidiary of Renault Véhicules Industriels since 1990, Mack Trucks is currently a subsidiary of AB Volvo. The company's headquarters are located in Greensboro, North Carolina...
(discontinued), Mercedes-BenzMercedes-BenzMercedes-Benz is a German manufacturer of automobiles, buses, coaches, and trucks. Mercedes-Benz is a division of its parent company, Daimler AG...
, its subsidiaries FreightlinerFreightliner TrucksFreightliner Trucks is an American manufacturer of heavy duty trucks, chassis and semi-trailer trucks in the United States. The company was founded as Freightliner Inc in 1942 and is now a division of Daimler Trucks North America, a subsidiary of the German Daimler AG...
and Western Star by Detroit Diesel
Detroit Diesel
As a corporation, Daimler Trucks North America has decided to rename the company "DETROIT".Detroit Diesel Corporation is an American-based diesel engine producer headquartered in Detroit, Michigan, USA...
made MBE 4000 engine