JPS5566687A - Capacity control device for variable capacity type oil pressure pump - Google Patents

Capacity control device for variable capacity type oil pressure pump

Info

Publication number
JPS5566687A
JPS5566687A JP13914778A JP13914778A JPS5566687A JP S5566687 A JPS5566687 A JP S5566687A JP 13914778 A JP13914778 A JP 13914778A JP 13914778 A JP13914778 A JP 13914778A JP S5566687 A JPS5566687 A JP S5566687A
Authority
JP
Japan
Prior art keywords
engine
switched
supply path
oil supply
control device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13914778A
Other languages
Japanese (ja)
Inventor
Takashi Kanai
Masami Ochiai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP13914778A priority Critical patent/JPS5566687A/en
Publication of JPS5566687A publication Critical patent/JPS5566687A/en
Pending legal-status Critical Current

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  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

PURPOSE: To improve the starting performance of the engine without increasing the size of the device, by providing a switching valve, which is switched in coordination with the starter when the engine is driven, and which shuts an oil supply path and at the same time releases the pressure in a control cylinder.
CONSTITUTION: One end of cylinder 8, which houses piston 9, is connected to the discharge side of the pump via oil supply path 10. When the engine is driven, electromagnetic switching valve 11 is switched in coordination with starter 14, and it shuts oil supply path 10 and at the same time releases the pressure in control cylinder 8. Thus, at the time of starting the engine, when electromagnetic valve 11 is switched, cylinder 8 is linked to oil tank 15, piston 9 produces no pressing force, spring 5 is pressed by its total restoring force, the capacity of the pump is reduced, and the torque applied to the pump decreases. By this, it is possible to improve the starting performance of the engine without enlarging the device.
COPYRIGHT: (C)1980,JPO&Japio
JP13914778A 1978-11-10 1978-11-10 Capacity control device for variable capacity type oil pressure pump Pending JPS5566687A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13914778A JPS5566687A (en) 1978-11-10 1978-11-10 Capacity control device for variable capacity type oil pressure pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13914778A JPS5566687A (en) 1978-11-10 1978-11-10 Capacity control device for variable capacity type oil pressure pump

Publications (1)

Publication Number Publication Date
JPS5566687A true JPS5566687A (en) 1980-05-20

Family

ID=15238653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13914778A Pending JPS5566687A (en) 1978-11-10 1978-11-10 Capacity control device for variable capacity type oil pressure pump

Country Status (1)

Country Link
JP (1) JPS5566687A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011126472A (en) * 2009-12-21 2011-06-30 Hitachi Automotive Systems Ltd Pump device and method for controlling the same
JP2013032155A (en) * 2012-09-10 2013-02-14 Hitachi Automotive Systems Ltd Pump device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011126472A (en) * 2009-12-21 2011-06-30 Hitachi Automotive Systems Ltd Pump device and method for controlling the same
DE102010053556B4 (en) * 2009-12-21 2019-09-19 Hitachi Automotive Systems, Ltd. Pump device and associated control method
JP2013032155A (en) * 2012-09-10 2013-02-14 Hitachi Automotive Systems Ltd Pump device

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