Fuel injection quantity sensing apparatus for an internal combustion engine
US4503820A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1982 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Oct 25, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piezoelectric sensor produces a first signal indicative of the pressure of fuel in a working chamber defined by the plunger housing and the inner end of a fuel distributing plunger reciprocating through the plunger housing. A threshold discriminator responds to the signal and produces a second signal indicative of the interval during which the first signal exceeds a fixed level. A counter counts clock pulses in the presence of the second signal and outputs its count value to a calculating unit which calculates a fuel injection quantity on the basis of the count value and engine speed sensed in accordance with the desired relationship amount count value, engine speed and fuel injection quantity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.