Fuel control system for a gaseous fuel internal combustion engin

Details Fuel control system for a gaseous fuel internal combustion engin Fuel control system for a gaseous fuel internal combustion engin

1996-12-20

1998-09-15

Solis, Erick R.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

123527, 123674, 123679, F02D 4114

Patent

active

058064907

ABSTRACT:
A fuel management system for a gaseous fuel internal combustion engine is disclosed in which a mass air flow sensor as well as a mass gas flow sensor provide input signals to an electronic control unit (ECU) which then determines the air/fuel ratio. The ECU in turn generates output signals to a fuel valve to control the mass of fuel flow to the engine and thus the air/fuel ratio. A turbocharger bypass valve, a precooler for the gaseous fuel supply, a pressure accumulator upstream from the fuel valve, as well as a system to calibrate the engine to the specific gaseous fuel is described to enhance the accuracy of the fuel management system. An improved pressure balanced valve for controlling the fuel flow to the engine is also provided as well as a cylinder pressure transducer to optionally provide an output signal to the ECU to determine the air/fuel ratio.

REFERENCES:
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patent: 5666923 (1997-09-01), Collier, Jr. et al.
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M. Ishii, et al., "Experimental Studies on a Natural Gas Vehicle," SAE Paper No. 942005 (1994).
S.H. Smith, L.E. Gettel, "A Compressed Natural Gas Mass Flow Driven Heavy Duty Electronic Engine Management System," SAE Paper No. 931822 (1993).

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