Kerosene engine with kerosene start

Details Kerosene engine with kerosene start Kerosene engine with kerosene start

1987-09-14

1988-09-13

Dolinar, Andrew M.

Internal-combustion engines

Starting device

For airplane

123 48A, 123 73A, 123179H, 123549, F02N 1708, F02N 1704

Patent

active

047701366

ABSTRACT:
In a two cycle kerosene fueled internal combustion engine, the temperature of the kerosene-air mixture is raised sufficiently to enable starting by spark ignition, without the assist of gasoline. The combustion chamber (16) is temporarily contracted by a moveable cylinder head (40) during starting to temporarily increase the compression ratio and increase the temperature of the kerosene-air mixture by increased compression pressure. The exhaust port (30) is closed by an obstruction valve (88) during starting to trap the mixture in the combustion chamber (16) such that each compression charging stroke of the piston (4) adds further heat of compression to the mixture to further heat same. An electrical resistance heater wire (114) is provided in the kerosene-air transfer passage (24) between the crankcase (14) and the inlet port (26) to the combustion chamber (16) to further heat the mixture to facilitate ignition. A compression relief valve (98) is provided for each of the remaining cylinders (34) such that cranking of the engine during starting must overcome the increased compression pressure in the contracted combustion chamber (16) but not the other combustion chambers (36).

REFERENCES:
patent: 1680710 (1928-08-01), Wall
patent: 4328771 (1982-05-01), Kawai et al.
patent: 4543921 (1985-10-01), Torigai et al.

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