Automotive vehicle engine with cylinder suspending mechanism for switching between a partial-cylinder non-working mode and an all-cylinder working mode depending on running conditions of the engine
US5481461A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1993 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | Aug 18, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to an automotive vehicle engine having controls for switching between a whole cylinder working mode and a partial cylinder non-working mode by making a valve motion arrangement operated in the intake and exhaust process. The automotive vehicle engine comprises-a revolution sensor, a boost pressure sensor, an ignition driving apparatus and a controlling apparatus for controlling the cylinder suspending mechanism and the ignition driving apparatus. The partial cylinder non-working mode or the all cylinder working mode is determined on the basis of the revolution speed "Ne" and the boost pressure data "Pb". An ignition timing retard process and an idle speed shifting-up process are performed so as to control the torque variation of the engine caused at the time when the all cylinder working mode is switched to the partial cylinder non-working mode or when the partial cylinder non-working mode is switched to the all cylinder working mode, thereby preventing torque shock from occurring and thereby preventing the engine from stopping and enhancing drivability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.