Process and device for controlling an internal combustion engine
AssigneeRobert Bosch GmbH
InventorJuergen Biester
Life of this patent
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Abstract
A method and a device for controlling an internal combustion engine having a high-pressure injection, and in particular, for controlling an internal combustion engine having a common rail system. The fuel is delivered by at least one pump from a low-pressure area into a high-pressure area. The fuel pressure prevailing in the high-pressure area is detected by a pressure sensor and is regulated by a pressure-regulation means. Given a defect in the area of the pressure regulation, the fuel pressure is controlled by influencing the flow of fuel in the low-pressure area.
Claims12
A method for controlling an internal combustion engine having a high-pressure injection, comprising the steps of:
- delivering a fuel using at least one pump from a low-pressure area to a high-pressure area;
- detecting a fuel pressure existing in the high-pressure area with a pressure sensor;
- adjusting the fuel pressure with a pressure-regulation device;
- and
- controlling a flow of the fuel in the low-pressure area for adjusting the fuel pressure when a defect is present in the pressure-regulation device in the high-pressure area.
A device for controlling an internal combustion engine having a high-pressure injection, comprising:
- at least one pump delivering a fuel from a low-pressure area to a high-pressure area;
- a pressure sensor detecting a fuel pressure existing in the high-pressure area;
- a first device regulating the fuel pressure;
- and
- a second device controlling a flow of the fuel in the low-pressure area to regulate the fuel pressure when a defect is present in the first device in the high-pressure area.
Dependencies are inferred from the claim text.