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US 2015/0159638 A1Published application
Pump Device
AssigneeHitachi Automotive Systems, Ltd.
InventorsMasayuki Saito, Chiharu Nakazawa, Masaki Misunou
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Abstract
An object of the present invention is to provide a pump device that is capable of improving a discharge performance. A first orifice 301 that is provided on a discharge oil passage (a pipe 12) of a pump 2 and a second orifice 302 that, when a flow amount Q becomes greater than a predetermined flow amount Q1, allows pass of brake fluid are provided.
Claims20
A pump device comprising:
- a pulsation reduction unit which reduces pulsation of brake fluid discharged from a pump, and
- the pulsation reduction unit having
- a first orifice which is provided on a discharge oil passage of the brake fluid discharged from the pump, and through which the discharged brake fluid passes;
- and
- a second orifice which is provided parallel to the first orifice, and through which, when a flow amount of the discharged brake fluid becomes greater than a predetermined flow amount, the brake fluid passes.
2 more elements
A pump device comprising:
- a pulsation reduction unit which reduces pulsation of brake fluid discharged from a pump, and
- the pulsation reduction unit having
- a first orifice which is provided on a discharge oil passage of the brake fluid discharged from the pump, and through which the discharged brake fluid passes;
- and
- a relief mechanism which is provided parallel to the first orifice and opens when a flow amount of the discharged brake fluid becomes greater than a predetermined flow amount.
2 more elements
A pump device comprising:
- a first fixed orifice that is provided on a discharge oil passage of a pump;
- and
- a second fixed orifice that, when a discharge flow amount of brake fluid of the pump becomes greater than a predetermined flow amount, allows pass of the brake fluid.
Dependencies are inferred from the claim text.