Idling speed control system and method thereof
US5564387A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1995 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Mar 7, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D31/005
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
There is provided a system for controlling an idling speed of in engine, comprising an engine speed sensor provided to detect an engine speed and produce an engine speed signal indicative thereof, and a control unit provided to derive a physical amount corresponding to an engine torque being balanced with an engine friction around a predetermined target idling speed in response to the engine speed signal, and calculate a fuel injection amount to be injected by an injector and an opening degree of an idling speed control valve, both appropriate to the derived physical amount. There is further provided a method for controlling an idling speed of an engine, comprising detecting an engine speed, deriving a physical amount corresponding to an engine torque being balanced with an engine friction around a predetermined target idling speed in response to the engine speed, and calculating a fuel injection amount to be injected by an injector and an opening degree of an idling speed control valve, both appropriate to the derived physical amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.