Throttle control for internal combustion engine having failure detection function
US6199535A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 10, 2000 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | May 10, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2400/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A throttle valve for an engine is disabled to be driven by an actuator by limiting a target throttle angle upper limit of a target throttle angle, when a failure is detected by an electronic control unit. Then, the target throttle angle is returned to a value used at a normal time at a restoration timing of a restoration of the system to a normal state or while the opening speed of a throttle valve at a restoration is being restrained. Thus, an abrupt opening operation of the throttle valve in response to the depression carried out by the driver on an accelerator pedal. Further, the throttle valve is driven in a limp-home operation mode by controlling the reduced number of operating cylinders of the engine. The reduced number of operating cylinders is increased or the operations of all cylinders are halted, when the engine speed rises above a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.