System for the use of gas as secondary fuel in diesel engines

Details System for the use of gas as secondary fuel in diesel engines System for the use of gas as secondary fuel in diesel engines

1983-08-02

1985-05-21

Cross, E. Rollins

Internal-combustion engines

Burning by highly compressed air

Oil engine air preheated

123577, 123458, 123526, F02M 116, F02M 2100

Patent

active

045179280

ABSTRACT:
A system for use of gas, like LPG, as secondary fuel in diesel engines is concerned. Normally aspirated and pressure charged engines with exhaust gas driven charging, with End-speed or All-speed governors or with common-rail-fuel injection systems are all included.
A signal (24,25) proportional to the momentary effective fuel consumption controls the gas supply (20) to the engine (1). A valve (19) in the gas supply (18) is connected to the control lever (16) of the engine governor (12) to allow gas supply only in a load range above approximately 25% and up to a maximum of approximately 40% of the full load total fuel consumption. In the lower load range uncomplete combustion of the gas thus is avoided, in the higher load range both detonation and overload are avoided and the opacity of the exhaust is improved. The consumption of liquid fuel is reduced and the exhaust gas composition is improved. An adjustable stop (28,29) limits the maximum injectable liquid fuel quantity when the engine is operated in the dual-fuel-mode.
The system is designed to be both retrofittable to existing engines and fittable to factory new engines.

REFERENCES:
patent: 2400247 (1946-05-01), Miller et al.
patent: 2544978 (1951-03-01), Blessings et al.
patent: 2558884 (1951-07-01), Steven et al.
patent: 2908258 (1959-10-01), Schowalter et al.
patent: 3575145 (1971-04-01), Steiger
patent: 4278064 (1981-07-01), Regueiro
patent: 4463734 (1984-08-01), Akeroyd
"Dual-Fuel Control", Diesel Engineering Handbook, pp. 288-292.

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