Hydraulic pressure control apparatus
AssigneeDenso Corporation
InventorsFuminori Suzuki, Motoyoshi Ando
Life of this patent
Estimating the term…
Abstract
A hydraulic pressure control apparatus has an actuator for controlling an automatic transmission. A case for receiving the actuator is constituted by an upper case, a lower case and a plate interposed between them. The plate is provided with a filter. The filter protects the actuator from foreign matters. The actuator is inserted into the case along the axial direction. The actuator is locked by a rotating operation or fixed by a snap fit. An electric control unit is laminated in parallel to the case regulating an oil passage. The electric control unit is cooled by fluid. The electric control unit has a liquid level sensor in its connector part.
Claims7
A hydraulic pressure control apparatus comprising:
- hydraulic pressure control member which adjusts or switches hydraulic pressure of fluid applied to an object to be controlled;
- an upper case and a lower case that receive the hydraulic pressure control member and have an inside wall for forming a passage for the fluid;
- and
- a plate member interposed between the upper case and the lower case, the plate member being made of non-porous material and having a plurality of through holes to define a filter that filters the fluid flowing through the passage,
- the upper case and the lower case cooperating with the plate member in forming the passage for the fluid,
- wherein the plate member includes at least one communication hole for forming the passage for the fluid in cooperation with the upper case and the lower case, and
- wherein said communication hole has a diameter greater than a diameter of a said through hole.
A hydraulic pressure control apparatus comprising:
- hydraulic pressure control member which adjusts or switches hydraulic pressure of fluid applied to an object to be controlled;
- an upper case and a lower case that receive the hydraulic pressure control member and have an inside wall for forming a passage for the fluid;
- and
- a plate member interposed between the upper case and the lower case, the plate member being made of non-porous material and having a plurality of through holes to define a filter that filters the fluid flowing through the passage,
- the upper case and the lower case cooperating with the plate member in forming the passage for the fluid,
- wherein the plate member includes at least one communication hole for forming the passage for the fluid in cooperation with the upper case and the lower case, and
- wherein said communication hole has a diameter substantially corresponding to a diameter of said passage as defined in at least one of said upper case and said lower case.
Dependencies are inferred from the claim text.