Method for operating an internal combustion engine
The method addresses the issue of engine shutdown due to faulty metering units by controlling fuel pressure in internal combustion engines, allowing for continued operation and improved vehicle availability.
DE102011005592B4Active Publication Date: 2025-05-08ROBERT BOSCH GMBH
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Patent Information
- Application Number
- DE102011005592
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2010-10-21
- Filing Date
- 2011-03-16
- Publication Date
- 2025-05-08
- Estimated Expiration
- 2031-03-16
AI Technical Summary
Technical Problem
Internal combustion engines often shut down due to faults in the metering unit, which controls fuel pressure, leading to restricted engine operation and reduced vehicle availability.
Method used
A method that allows controlled fuel injections by influencing the fuel pressure in a high-pressure accumulator, even with a faulty metering unit, by adjusting the operation of the prefeed pump based on pressure signal thresholds.
Benefits of technology
Enables continued driving with a faulty metering unit by maintaining fuel pressure within safe limits, preventing engine shutdown and enhancing vehicle availability.
✦ Generated by Eureka AI based on patent content.
Abstract
Method for operating an internal combustion engine, wherein fuel is supplied from a fuel tank (9), via a pre-supply pump (5), via a metering unit (14) and via a high-pressure pump (3) to a high-pressure accumulator (13), wherein the pre-supply pump (5) can be switched on to supply fuel, and wherein a pressure signal (22; 22a-22d) of a pressure in the high-pressure accumulator (13) is determined, characterized in that a fault of the metering unit (14) is determined, that the metering unit (14) is substantially open, that a time period (d(n); d(n+1)) is determined as a function of the determined pressure signal (22; 22a-22d), and that the pre-supply pump (5) is switched on for the time period (d(n); d(n+1)).
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