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JPS54159521A - Hydraulic valve lift device - Google Patents

Hydraulic valve lift device

Info

Publication number
JPS54159521A
JPS54159521A JP6807378A JP6807378A JPS54159521A JP S54159521 A JPS54159521 A JP S54159521A JP 6807378 A JP6807378 A JP 6807378A JP 6807378 A JP6807378 A JP 6807378A JP S54159521 A JPS54159521 A JP S54159521A
Authority
JP
Japan
Prior art keywords
oil
valve
plunger
chamber
hole
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
JP6807378A
Other languages
Japanese (ja)
Inventor
Toru Kosuda
Michihiro Ohashi
Yasuhiro Takeuchi
Tadahide Toda
Noboru Matsubara
Masaaki Takizawa
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.)
Toyota Motor Corp
Soken Inc
Original Assignee
Nippon Soken Inc
Toyota Motor Corp
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 Nippon Soken Inc, Toyota Motor Corp filed Critical Nippon Soken Inc
Priority to JP6807378A priority Critical patent/JPS54159521A/en
Priority to US06/034,186 priority patent/US4347812A/en
Publication of JPS54159521A publication Critical patent/JPS54159521A/en
Pending legal-status Critical Current

Links

Landscapes

  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

PURPOSE: To prevent shocking brake force operated at a valve mechanism when an engine rotates at high speed by so forming the hydraulic pressure in a brake chamber of a valve lift device as to control the pressure less than set value by a relief valve.
CONSTITUTION: Before a cam shaft 1 rotated by an engine pushes up a lifter body 5, oil flown from an oil inlet 11 is flown through a supply groove 12 and oil feed hole 13 of a plunger 6 into an oil feed chamber 14 and through a variable throttle hole formed by a slit 15 and a flange 9 into a brake chamber 10. The oil also pushes down a ball 18 to thereby flow into the hydraulic oil chamber 26 through throttle hole 27, escape groove 28 and drain oil hole 29 out. When the plunger 6 is then lowered upon closure of the valve 25 after opening the valve 25 upon rotation of the cam shaft 1, the opening area of the slit 15 becomes small to thereby increase the reaction against the droppage of the plunger 6 so as to thereby reduce the impact upon closing of the valve 25.
COPYRIGHT: (C)1979,JPO&Japio
JP6807378A 1978-04-28 1978-06-06 Hydraulic valve lift device Pending JPS54159521A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP6807378A JPS54159521A (en) 1978-06-06 1978-06-06 Hydraulic valve lift device
US06/034,186 US4347812A (en) 1978-04-28 1979-04-27 Hydraulic valve lift device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6807378A JPS54159521A (en) 1978-06-06 1978-06-06 Hydraulic valve lift device

Publications (1)

Publication Number Publication Date
JPS54159521A true JPS54159521A (en) 1979-12-17

Family

ID=13363222

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6807378A Pending JPS54159521A (en) 1978-04-28 1978-06-06 Hydraulic valve lift device

Country Status (1)

Country Link
JP (1) JPS54159521A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4407241A (en) * 1980-12-31 1983-10-04 Cummins Engine Company, Inc. Expandable hydraulic tappet with a variable exit valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4407241A (en) * 1980-12-31 1983-10-04 Cummins Engine Company, Inc. Expandable hydraulic tappet with a variable exit valve

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