Supercharging pressure control system for an internal combustion engine with a tubocharger and method of operation
US4697421A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1984 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Oct 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A supercharging pressure control system for an internal combustion engine with a turbocharger, for controlling supercharging pressure in dependence on operating conditions of the engine, includes a waste gate valve disposed to selectively close and open a bypass exhaust passage, an actuator for actuating the waste gate valve, a control valve for communicating the actuator with the atmosphere to substantially vary the valve opening pressure of the waste gate valve, a throttle valve opening sensor, a pressure sensor for detecting intake passage pressure downstream of the throttle valve, and an electronic control unit for controlling through feedback the intake passage pressure to reach a target value by actuating the control valve in dependence on the difference between the target value and the detected pressure value. The feedback control is carried out when the throttle valve opening exceeds a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.