Control circuit and method for controlling the speed of an electric fuel pump for an internal combustion engine equipped with fuel injection
US4940034A · kind A · utility
17Cited by
12References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Jan 6, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D13/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention is directed to a control circuit for controlling the speed of an electric fuel pump for an internal combustion engine having fuel injection and includes a speed limit-value comparator for controlling the speed or delivery rate of the fuel pump to a value below the minimum speed or delivery rate for a speed of the engine above a specific predetermined limit speed which is impermissibly high. The minimum speed or minimum delivery rate is then the delivery rate which is required for at least building up the system pressure in the fuel injection system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.