Charging pressure control apparatus for an internal combustion engine with a dual turbocharger system
US5289684A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Jul 31, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A charging pressure control apparatus including a first duty control solenoid valve for controlling the opening degree of an exhaust bypass valve to thereby control a charging pressure during "one-turbocharger-operation", and a second duty control solenoid valve for controlling the opening degree of a waste gate valve to thereby control a charging pressure during "two-turbocharger-operation". The operating conditions at high altitudes of the first duty control solenoid valve and the second duty control solenoid valve are made different from those at low altitudes so that the power characteristic of the turbocharged engine is as good at high altitudes as at low altitudes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.