Intake pipe pressure indicating system for an internal combustion engine of a vehicle
US4428227A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1982 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | May 19, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/083
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An intake pipe pressure indicating system for an internal combustion engine of a vehicle having an intake pipe including a supercharger and a throttle valve. The system comprises sensors which detect the internal pressure of the intake pipe at an upstream position and at a downstream position, respectively, with respect to the throttle valve and provides corresponding output signals. A comparator provides a logic signal based on the result of a comparison between the output signal from either of the sensors and a reference value. A selection circuit is provided which is adapted to select and to transmit and output either of the output signals on the basis of the logic signal, and a single indicator is provided which is adapted to provide an indication corresponding to the output signal of the selection circuit. The respective intake pipe pressures at the upstream position and at the downstream position with respect to the throttle valve can be selectively indicated by a single indicator in a continuous manner so that the indicator is used effectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.