Method of operating an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsGerhard Geyer, Andreas Holl
Life of this patent
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Abstract
A method of operating an internal combustion engine is provided for stabilizing the fuel pressure in a pressure accumulator, for example, when the quantity of fuel withdrawn from the pressure accumulator for injection rapidly changes.
Claims8
An internal combustion engine for a motor vehicle, the internal combustion engine comprising:
- i) a metering unit for supplying a delivery quantity to a high-pressure pump;
- ii) means for withdrawing an injection fuel quantity from a pressure accumulator;
- and
- iii) an injector for injecting the injection fuel quantity;
- wherein the delivery quantity is immediately changed when the injection fuel quantity changes from an old value to a new value, the delivery quantity being changed as a function of the new value, and the old value of the injection fuel quantity continuing to be injected for a selectable delay time.
A control unit for an internal combustion engine of a motor vehicle, the internal combustion engine having a high-pressure pump operable to pump fuel into a pressure accumulator, and a metering unit, the control unit comprising:
- an arrangement operable to control the following steps:
- i) supplying a delivery quantity to the high-pressure pump using the metering unit;
- ii) withdrawing an injection fuel quantity from the pressure accumulator;
- and
- iii) injecting the injection fuel quantity;
- wherein the delivery quantity is immediately changed when the injection fuel quantity changes from an old value to a new value, the delivery quantity being changed as a function of the new value, and the old value of the injection fuel quantity continuing to be injected for a selectable delay time.
A computer-readable medium storing a plurality of instruction sets for a control unit of an internal combustion engine of a motor vehicle, the internal combustion engine having a high-pressure pump, a pressure accumulator and a metering unit, the high-pressure pump pumping fuel into the pressure accumulator, the plurality of instruction sets comprising:
- i) an instruction set for controlling supplying a delivery quantity to the high-pressure pump using the metering unit;
- ii) an instruction set for withdrawing an injection fuel quantity from the pressure accumulator;
- and
- iii) injecting the injection fuel quantity;
- wherein the delivery quantity is immediately changed when the injection fuel quantity changes from an old value to a new value, the delivery quantity being changed as a function of the new value, and the old value of the injection fuel quantity continuing to be injected for a selectable delay time.
A method of operating an internal combustion engine having a high-pressure pump, a pressure accumulator and a metering unit, the method comprising the steps of:
- supplying a delivery quantity to the high-pressure pump using the metering unit;
- pumping fuel into the pressure accumulator using the high-pressure pump;
- withdrawing an injection fuel quantity from the pressure accumulator;
- and
- injecting the injection fuel quantity;
- wherein the delivery quantity is immediately changed when the injection fuel quantity changes from an old value to a new value, the delivery quantity being changed as a function of the new value, and the old value of the injection fuel quantity continuing to be injected for a selectable delay time.
Dependencies are inferred from the claim text.