Fuel injection system for an internal combustion engine
AssigneesIveco Fiat S.p.A., Dereco Dieselmotoren Forschungs-und Entwick-lungs-AG
InventorChristian Mathis
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Abstract
A high-pressure, continuous-delivery piston pump, controlled as a function of engine speed and load, supplies fuel to an accumulator supplying injectors. On the intake side of the pump, there is provided a throttle for metering the amount of fuel supplied by the pump. Via operating signals, the throttle is regulated by an electronic control device in such a manner as to supply the pump and pressurize only the amount of fuel strictly required for operating the injectors and the engine, thus eliminating any energy losses caused by fuel feedback to the tank, and drastically reducing fuel consumption.
Claims8
A fuel injection system for an internal combustion engine, particularly a Diesel engine, comprising injectors for each cylinder controlled by an electronic control device, and, upstream from the said injectors, a fuel accumulator supplying said injectors and itself supplied by a continuous-delivery fuel pump controlled as a function of engine speed and load;
- characterised in that, on the intake side of said pump, there is provided a throttle means for metering the amount of fuel supplied by said pump;
- and that, via operating signals, said throttle means is regulated mechanically and/or by said electronic control device in such a manner as to supply the said pump with no more than the required amount of fuel.
Dependencies are inferred from the claim text.