Internal-combustion engines – Combustion chamber means combined with air-fuel mixture... – Air or combustible mixture entering the combustion chamber...
Patent
1978-04-13
1980-12-30
Lazarus, Ronald H.
Internal-combustion engines
Combustion chamber means combined with air-fuel mixture...
Air or combustible mixture entering the combustion chamber...
123548, F02M 3100
Patent
active
042417120
ABSTRACT:
Two embodiments of internal combustion engine induction systems that provide for more efficient operation at low speed and low temperature. The induction system in each embodiment comprise a relatively large main induction passage and a relatively small sub-induction passage, each of which discharges into the combustion chamber of the engine. A throttle valve arrangement is provided so that at low temperatures and low load substantially all of the intake charge is delivered to the combustion chamber through the relatively small sub-induction passage. In this way the intake charge is drawn into the chamber at a high velocity and, if desired, swirling pattern to increase turbulence in the combustion chamber. This has the effect of accelerating combustion and promoting rapid flame propagation so as to improve running under these conditions and also so as to improve fuel economy under these conditions. In each embodiment of the invention the intake to the sub-intake passage is disposed in such a location that it will receive a heated charge to further promote fuel vaporization during the induction cycle. In one embodiment of the invention the intake for the sub-intake passage is disposed so that it will receive ram air.
REFERENCES:
patent: 2395264 (1946-02-01), Gardner
patent: 2473808 (1949-06-01), Mallory
patent: 3543736 (1970-12-01), Suzuki
patent: 3554174 (1971-01-01), Clawson
patent: 3659564 (1972-05-01), Suzuki
patent: 4002704 (1977-01-01), Laprade
patent: 4018199 (1977-04-01), Furucz
patent: 4064850 (1977-12-01), Nakagawa
patent: 4151820 (1979-05-01), Furucz
Beutler Ernest A.
Lazarus Ronald H.
Yamaha Hatsukoki Kabushiki Kaisha
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