Hydraulic control device

Patent metadata

Field	Value
Publication number	US-9266519-B2
Application number	US-201114358100-A
Country	US
Kind code	B2
Filing date	Nov 22, 2011
Priority date	Nov 22, 2011
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A hydraulic control device includes an accumulator configured to accumulate oil supplied by a mechanical pump and supply the accumulated oil to a C1 control system (clutch) by discharging the accumulated oil; a first oil passage connected to the hydraulic route (clutch oil passage) on an upstream side of a SLC linear solenoid; a second oil passage connected to the hydraulic route on a downstream side of the manual valve; and connection control unit (a switching valve and a pressure accumulation control valve) configured to control the connection between the accumulator and the hydraulic route so that the accumulator is in communication with one of the first oil passage and the second oil passage.

First claim

The invention claimed is:

1. A hydraulic control device of a vehicle comprising:
a mechanical pump configured to discharge oil by driving of an engine,
a hydraulic route configured to supply the oil discharged by the mechanical pump to a clutch,
a clutch pressure control valve provided on the hydraulic route and configured to control a clutch pressure serving as a hydraulic pressure supplied to the clutch, and
a manual valve provided on a downstream side of the clutch pressure control valve of the hydraulic route and configured to switch a hydraulic pressure supply to the clutch depending on a shift operation of the vehicle, the hydraulic control device comprising:
an accumulator configured to accumulate the oil supplied by the mechanical pump and supply the accumulated oil to the clutch by discharging the accumulated oil;
a first oil passage, connected to the hydraulic route and the accumulator, is on an upstream side of the clutch pressure control valve;
a second oil passage, connected to the hydraulic route and the accumulator, is on a downstream side of the manual valve; and
a connection control unit configured to control the connection between the accumulator and the hydraulic route so that the accumulator is in communication with one of the first oil passage and the second oil passage.

2. The hydraulic control device according to claim 1 , wherein
the connection control unit includes
a switching valve configured to switch so that the accumulator is in communication with the hydraulic route via the first oil passage during stop of the engine, and to switch so that the accumulator is in communication with the hydraulic route via the second oil passage during operation of the engine, and
a pressure accumulation control valve disposed between the switching valve and the accumulator and configured to control the pressure accumulation and discharge of the accumulator.

Assignees

• Morino Takuro
• Moriyama Shuji
• Ito Yoshio
• Toyota Motor Co Ltd

Inventors

• Morino Takuro
• Moriyama Shuji
• Ito Yoshio

Classifications

• F16H2061/0034

  Accumulators for fluid pressure supply; Control thereof · CPC title

• F16H61/00

  Control functions within {control units of} change-speed- or reversing-gearings for conveying rotary motion {; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing} · CPC title

• F16H61/0003 Primary

  Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox · CPC title

• B60W10/06

  including control of combustion engines · CPC title

• F16H61/0267

  Layout of hydraulic control circuits, e.g. arrangement of valves · CPC title