Invention Grant
- Patent Title: Fuel injection pump for internal combustion engines
- Patent Title (中): 内燃机燃油喷射泵
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Application No.: US212997Application Date: 1988-06-29
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Publication No.: US4811711APublication Date: 1989-03-14
- Inventor: Gerhard Stumpp , Wolf Wessel
- Applicant: Gerhard Stumpp , Wolf Wessel
- Applicant Address: DEX Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DEX Stuttgart
- Priority: DEX3725089 19870729
- Main IPC: F02D1/02
- IPC: F02D1/02 ; F02B3/06 ; F02D1/12 ; F02D17/04 ; F02M63/02 ; F02M39/00
Abstract:
A fuel injection pump for internal combustion engines, in particular an in-line injection pump for Diesel engines, is proposed having an injection quantity governor and an electrically driven feed pump, in which in order to assure an emergency shutoff in the event of a malfunction of the injection quantity governor, a check valve, the forward flow direction of which is toward a suction chamber filled with fuel by the feed pump, is disposed between the pressure-side outlet of the feed pump and the suction chamber. An emergency shutoff device responding to a malfunction switches off the feed pump drive, so that because of the lack of feed pressure the check valve closes and blocks off the suction chamber. The engine comes to a stop, as soon as a partial vacuum is established in the suction chamber, which occurs as soon as several revolutions later.
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