Engine control method
US5337720A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1993 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | May 26, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2250/21
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine control method in which a valve drive mechanism and a fuel injection device are controlled by an electronic control unit during transition between a cylinder-off state and a cylinder-on state of a variable-cylinder engine. During transition from the cylinder-on state to the cylinder-off state, the operation of a suction valve and an exhaust valve is stopped when at least one suction stroke is executed after the stoppage of fuel injection. When the operating state is restored from the cylinder-off state to the cylinder-on state, on the other hand, normal combustion is effected immediately after the valve operation is restarted following preliminary fuel injection if the engine is in a rapid-acceleration operation region. In a normal operation mode, the fuel injection is started after the valve operation is restarted. Thus, it is possible to reduce a shock which is attributable to fluctuations of the engine output torque caused during the change between the cylinder-off state and the cylinder-on state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.