Fuel pump control device for internal combustion engine
US5555872A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1995 |
| Grant date | Sep 17, 1996 |
| Priority date | — |
| Expiry date | May 24, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/3082
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a pump control circuit, if a battery voltage declines to a voltage level lower than that required to insure a constant voltage, a low-voltage detection circuit outputs a low voltage detection signal. In the case of the decline in the battery voltage, an NOR circuit outputs the conversion signal from an internal logic section, and a pump control signal bypassing the internal logic section, giving priority to the latter signal. A motor drive circuit turns FET ON and OFF in accordance with the output signal of the NOR circuit. According to ON/OFF of the FET, the intermittent control of the current from the battery to the pump drive motor is performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.