Intake valve mechanism for preventing back flow of exhaust gas

Details Intake valve mechanism for preventing back flow of exhaust gas Intake valve mechanism for preventing back flow of exhaust gas

1976-06-09

1978-06-13

Myhre, Charles J.

Internal-combustion engines

Multiple cylinder

123 79C, 123188VA, F01L 128

Patent

active

040942775

ABSTRACT:
The intake valve mechanism employs a back-flow valve to prevent undesirable back-flow of gases from a combustion chamber of an internal combustion engine out an intake port of the chamber during a period of time in which a poppet valve for the intake port of the chamber is open. The back-flow valve is positioned between an intake port valve seat and the intake port poppet valve for blocking the intake port in response to pressure in the combustion chamber. To minimize air-fuel resistance through the intake port, a spring is employed for continuously biasing the back-flow valve to track the movement of the poppet valve, the spring having sufficient strength to prevent the back-flow valve from blocking the intake port when the poppet valve is open until the pressure in the combustion chamber reaches a predetermined value.

REFERENCES:
patent: 2863429 (1958-12-01), Bouteleux
patent: 3903855 (1975-09-01), Klakulak et al.
patent: 3995609 (1976-12-01), Klomp

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