Patent · US Expired

Internal combustion engine fuel injection control system

US4046113A · kind A · utility

3Cited by
5References
7Claims
0Family size

Assignee

Inventor

Key dates

Filing dateFeb 5, 1976
Grant dateSep 6, 1977
Priority date—
Expiry dateFeb 5, 1996

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01F1/78
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

An i.c. engine fuel injection control includes a corona-discharge type transducer for measuring the mass of air aspirated by the engine. Since such a transducer is humidity sensitive a compensation circuit is provided for automatically applying a humidity correction to the control circuit which is used to control the quantity of fuel injected as a function of the transducer output. This control circuit includes an integrator to which the transducer output is periodically applied and a current source which periodically discharges the integrator, the time taken to discharge determining the quantity of fuel injected. The current source is controlled by the humidity sensitive means, to obtain the required compensation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.