Gaseous fuel injection control system using averaged fuel pressu

Details Gaseous fuel injection control system using averaged fuel pressu Gaseous fuel injection control system using averaged fuel pressu

1994-07-05

1996-07-09

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123687, 123488, 123527, F02D 4114, F02D 4134

Patent

active

055334920

ABSTRACT:
An fuel injection control system suitable for use with internal combustion vehicle engines fueled by compressed natural gas or the like. A liquid-fuel type closed-loop system, modified for gaseous fuel, establishes the duration of each injection command signal by the combination of a P.I.D. controller responsive to the level of exhaust oxygen, an adaptive table which stores previously determined fuel delivery rate values for particular engine speed and load conditions, an injector supply voltage table and an added table modifies the fuel delivery rate correction values which compensate for unwanted pressure variations which occur in the fuel supply due to injector sequencing effects, firing order, fuel flow effects, temperature effects, and fuel sensor errors.

REFERENCES:
patent: 4430978 (1984-02-01), Lewis et al.
patent: 4493302 (1985-01-01), Kawamura

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