Decompression-type internal-combustion engine and method of impr

Details Decompression-type internal-combustion engine and method of impr Decompression-type internal-combustion engine and method of impr

1976-01-02

1978-04-18

Myhre, Charles J.

Internal-combustion engines

Starting device

Compression relieving type

123 906, 123105, F01L 1308

Patent

active

040845680

ABSTRACT:
Improved decompression-type, four-cycle internal-combustion engine which has the conventional compression chamber, reciprocable piston, and intake valve therein; comprising, in accordance with the invention, means for delaying the closing time of the valve, in the course of the compression stroke, with the piston moving upwards, for obtaining reduced compression pressure; and means for closing the valve to its at least nearly closed condition within the closing delay period. The inventive delaying and closing means is preferably embodied in a specifically shaped cam for controlling the operation of the intake valve, with respective depressed, slightly protruding as well as flat portions at preferred, predetermined crank angle positions.

REFERENCES:
patent: 2344993 (1944-03-01), Lysholm
patent: 2644436 (1953-07-01), Berlyn
patent: 3403667 (1968-10-01), Santi
patent: 3574304 (1971-04-01), Santi

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