Injection unit for internal combustion engines fed with gaseous

Details Injection unit for internal combustion engines fed with gaseous Injection unit for internal combustion engines fed with gaseous

1985-02-13

1986-12-30

Cross, E. Rollins

Internal-combustion engines

Charge forming device

Gaseous fuel and air mixer

123 27GE, 123577, 48180R, 48189, F02B 4300

Patent

active

046320830

ABSTRACT:
A gaseous fuel injection unit for internal combustion engines fed with gaseous fuel such as liquefied petroleum gas or methane, comprises at least one volumetric measuring device (7) arranged to feed during each engine cycle a determined volume related to the piston displacement, and into which there is fed and respectively discharged that quantity of gaseous fuel complying with the required mixture ratio of fuel to air drawn in by the engine during each cycle. A control unit (5) senses operating pressures along the intake pipe system (1), namely in the injection zone (19) and in the zone (18) downstream of the throttle valve (2), in order to control an expander unit (10, 11) which feeds the gaseous fuel to the volumetric measuring device (7) at a pressure equal to the sum of the absolute values of the two pressures at the aforesaid points, and to control said volumetric measuring device.

REFERENCES:
patent: 3540419 (1970-11-01), Fox
patent: 4449509 (1984-05-01), Young
patent: 4505249 (1985-03-01), Young

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