Variable timing of multiple engine cylinder valves
US5499606A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1995 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Jan 11, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2800/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Lost motion variable valve timing systems using hydraulic actuators controlled by a single control valve, preferably an electronically controlled solenoid valve, for actuating two or more valves on similar or identical timing and lift curves include prevention means that stop discharge pulses from one actuator being transmitted to and adversely affecting another actuator connected to the same control valve. Such prevention means may include one way check valves in the discharge lines connected with the control valve, non-aligned multiple inlet ports in the control valve and positioned to avoid transfer of pulses from one inlet port to another, or other return pulse preventing means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.