Apparatus for controlling negative pressure in internal combustion engine
US6006716A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1997 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Jun 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An improved apparatus for controlling brake force is disclosed. An engine selectively performs a stratified charge combustion and a uniform charge combustion. A brake booster is actuated by negative pressure an absolute value of which is greater than a predetermined magnitude. An electronic control unit actuates the throttle valve to apply the negative pressure to the brake booster when the magnitude relating to the pressure in the brake booster is smaller than the predetermined value. Engine condition is converted from the stratified charge combustion to the uniform charge combustion. A fuel injector directly injects the fuel into the cylinder to set the engine to perform the stratified charge combustion. A basic injection timing of the fuel injector is computed based on the operation state of the engine. The basic timing is advanced when the stratified charge combustion is performed and the negative pressure is applied to the brake booster.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.