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Title:
OIL PUMP DEVICE
Document Type and Number:
Japanese Patent JP2001263268
Kind Code:
A
Abstract:

To restrain generation of an abnormal sound by reducing pulsation of hydraulic pressure by preventing a high pressure hydraulic fluid flowed in a sub-suction port via a control valve from a delivery port from flowing in a main suction port via a pump chamber from the sub-suction port.

A shape B1 of an anti-rotational directional side end part in the main suction port B of an oil pump 20 is formed in the shape of running along a rotational directional side end part shape R1 of the pump chamber R (an oblique line applied part) instantaneously sealed between the sub-suction port A and the main suction port B, and a shape A1 of an inner peripheral side end part in the sub-suction port A is formed in the shape of running along a rotational locus of the anti-rotational directional side end R2 (a contact point of both rotors 22 and 23) of the pump chamber R instantaneously sealed between the sub-suction port A and the main suction port B.


Inventors:
Ono, Hisashi
Application Number:
JP2000000076677
Publication Date:
September 26, 2001
Filing Date:
March 17, 2000
Export Citation:
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Assignee:
AISIN SEIKI CO LTD
International Classes:
F01M1/02; F04C2/10; F04C14/00; F04C14/26; F04C15/06; (IPC1-7): F04C15/04; F01M1/02; F04C2/10
Attorney, Agent or Firm:
大庭 咲夫 (外1名)