Internal-combustion engines – Engine speed regulator – Specific throttle valve structure
Patent
1993-04-05
1994-05-31
Cross, E. Rollins
Internal-combustion engines
Engine speed regulator
Specific throttle valve structure
123403, 251305, F02D 908, F16K 122
Patent
active
053159756
ABSTRACT:
An intake control device for an internal combustion engine having a body member 1 and a throttle valve 5 disposed within an air passage 4 . The external circular edge of the throttle valve 5 is divided, with a throttle shaft 6 into a first edge portion 5a which moves toward the upstream side of the air passage 4 and a second edge portion 5b which moves toward the downstream side of the air passage 4. On an inner wall 7 of the air passage 4 of the body member 1 are formed an upstream-side spherical wall surface 8 in a position facing the first edge portion 5a and a downstream-side spherical wall surface 9 in a position facing the second edge portion 5b. A first clearance 13 formed between the first edge portion 5a and the upstream-side spherical wall surface 8 is smaller than a second clearance 14 formed between the second edge portion 5b and the downstream-side spherical wall surface; the second edge portion 5b of the throttle valve 5 may not come into contact with the downstream-side spherical wall surface 9 even when a high intake manifold vacuum is built on the downstream side of the throttle valve 5 when the throttle valve 5 is in a position for closing the air passage 4.
REFERENCES:
patent: 1230337 (1917-06-01), Stoffel
patent: 4308837 (1982-01-01), Nohira et al.
patent: 4391247 (1983-07-01), Shioyama et al.
patent: 4462358 (1984-07-01), Ishida et al.
patent: 4474150 (1984-10-01), Foley et al.
patent: 4572478 (1986-02-01), Vogler et al.
patent: 4967778 (1990-11-01), Ball et al.
Eitoku Kenji
Hattori Yasuhiko
Aisan Kogyo Kabushiki Kaisha
Cross E. Rollins
Moulis Thomas N.
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