Internal-combustion engines – Multiple cylinder
Patent
1988-05-05
1989-06-20
Okonsky, David A.
Internal-combustion engines
Multiple cylinder
123 52MC, F02B 7518
Patent
active
048401463
ABSTRACT:
A multiple throttle mechanism comprises a pair of intake manifold blocks separated from each other and each having two or more parallel passages formed therethrough and a wall portion separating thereby the adjacent parallel passages, the parallel passages each being a part of each of the intake manifold passages communicating with respective engine cylinders, and a pair of throttle shafts arranged in an axial direction, each crossing the parallel passages, passing through a through hole formed in the wall portion of the intake manifold block and supported on the intake manifold block, the throttle valves being mounted on the throttle shafts so that the throttle valves are operated simultaneously to control the cross sectional area of each of the parallel passage. The multiple throttle mechanism further comprises air gaps formed between an inner circumference of the through holes and an outer circumference of the shafts to provide an initial air flow.
REFERENCES:
patent: 3664316 (1972-05-01), Garcea
patent: 4253432 (1981-03-01), Nohira et al.
patent: 4520775 (1985-06-01), Nakamura
patent: 4660530 (1987-04-01), Sugiyama et al.
Ishizawa Isamu
Tamaki Sigeo
Yanagisawa Shozo
Hitachi , Ltd.
Okonsky David A.
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