System for heating intake pipe of internal combustion engine

Details System for heating intake pipe of internal combustion engine System for heating intake pipe of internal combustion engine

1975-10-29

1977-01-11

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60289, 123122AB, F02M 3100, F02B 7510

Patent

active

040020258

ABSTRACT:
A system for heating the intake pipe of an internal combustion engine including a combustion equipment disposed adjacent to the intake pipe, a fuel supply system for supplying the fuel into the combustion equipment and an air supply system including an air pump for charging the air into the combustion equipment, the intake pipe being heated by the heat generated by the combustion of the air-fuel mixture in the combustion equipment. The fuel supply system includes a main fuel injection nozzle and an auxiliary fuel injection nozzle which is controlled by control means so as to start or stop the fuel injection depending upon the operating conditions of the engine. When the engine is started, both the main and auxiliary fuel injection nozzles inject fuel so as to attain the rapid heating of the intake pipe, but when the temperature of the intake pipe exceeds a predetermined level, the injection by the auxiliary fuel injection nozzle is stopped. The heating system further includes a secondary air supply line interconnecting the air pump and the exhaust manifold of the engine and control means for controlling the flow rate of the secondary air in response to the negative pressure in the intake pipe, thereby controlling the flow rate of the air to be charged into the combustion equipment.

REFERENCES:
patent: 2057808 (1936-10-01), Widegren
patent: 2401862 (1946-06-01), Dugas
patent: 3020903 (1962-02-01), Kloss
patent: 3687122 (1972-08-01), Kamo
patent: 3732696 (1973-05-01), Masaki
patent: 3802194 (1974-04-01), Tanasawa
patent: 3828747 (1974-08-01), Nambu

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