CA3034548A1 - Variable valve tappet - Google Patents

Variable valve tappet Download PDF

Info

Publication number
CA3034548A1
CA3034548A1 CA3034548A CA3034548A CA3034548A1 CA 3034548 A1 CA3034548 A1 CA 3034548A1 CA 3034548 A CA3034548 A CA 3034548A CA 3034548 A CA3034548 A CA 3034548A CA 3034548 A1 CA3034548 A1 CA 3034548A1
Authority
CA
Canada
Prior art keywords
tappet
base
push rod
holder
valve push
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.)
Granted
Application number
CA3034548A
Other languages
French (fr)
Other versions
CA3034548C (en
Inventor
Wei Tian
Jiahui ZHAO
Zhiqiang Han
Xun Zhang
Zhi Liu
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.)
Xihua University
Original Assignee
Xihua University
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 Xihua University filed Critical Xihua University
Publication of CA3034548A1 publication Critical patent/CA3034548A1/en
Application granted granted Critical
Publication of CA3034548C publication Critical patent/CA3034548C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0031—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of tappet or pushrod length

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

A variable valve tappet, comprising a tappet base (9) and a holder (12). The tappet base (9) is of a cylinder structure having a T-shaped hollow cylindrical groove provided on an upper portion thereof, and a tappet sleeve (14) being of a hollow cylinder structure is fit over the tappet base (9). The tappet further comprises a valve push rod base (16) being of a cylinder structure. An additional lift cavity (20) is formed between the lower surface of the valve push rod base (16) and the tappet base (9). The holder (12) is of a hollow cylindrical structure. The upper surface of the valve push rod base (16) extends outwards along the outer edge of the cylinder to match the inner surface of the holder (12), so that an oil storage cavity (17) is formed between the upper surface of the valve push rod base (16) and the inner surface of the holder (12). An oil pumping cavity (11) is formed among the outer surface of the holder (12), the inner surface of the tappet sleeve (14), and the tappet base (9). A tappet spring (19) is provided in the oil pumping cavity (11) outside the valve push rod base (16). The tappet sleeve (14) is provided with an oil inlet (8) connected to an oil supply system, and an oil return port (22) connected to an oil return system. The upper surface of the valve push rod base (16) is connected to a valve push rod (15). A cam (1) is provided directly below the tappet base (9). The variable valve tappet can achieve valve timing and lift control in operating situations where an engine have different speeds, and features low costs, high applicability, and high stability.
CA3034548A 2016-09-22 2016-10-20 Variable valve tappet Expired - Fee Related CA3034548C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201610841364.1 2016-09-22
CN201610841364.1A CN106285811B (en) 2016-09-22 2016-09-22 A kind of changeable air valve tappet
PCT/CN2016/102665 WO2018053892A1 (en) 2016-09-22 2016-10-20 Variable valve tappet

Publications (2)

Publication Number Publication Date
CA3034548A1 true CA3034548A1 (en) 2018-03-29
CA3034548C CA3034548C (en) 2019-06-04

Family

ID=57712651

Family Applications (1)

Application Number Title Priority Date Filing Date
CA3034548A Expired - Fee Related CA3034548C (en) 2016-09-22 2016-10-20 Variable valve tappet

Country Status (4)

Country Link
CN (1) CN106285811B (en)
CA (1) CA3034548C (en)
GB (1) GB2568621B (en)
WO (1) WO2018053892A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116201620B (en) * 2023-01-31 2024-05-17 重庆长安汽车股份有限公司 Hydraulic tappet, engine and vehicle

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB566959A (en) * 1944-06-16 1945-01-22 Thomas Hindle Improvements in tappet mechanism for actuating poppet or like valves for internal combustion and other engines
GB627281A (en) * 1947-09-18 1949-08-04 Bernard Michael Francis Samuel Improvements in or relating to hydraulic tappets
JPS54121314A (en) * 1978-03-13 1979-09-20 Toyota Motor Corp Valve lift varying mechanism for internal combustion engine
JPS54155309A (en) * 1978-05-27 1979-12-07 Nissan Motor Co Ltd Valve moving system for internal combustion engine
JPS59147806A (en) * 1983-02-10 1984-08-24 Isuzu Motors Ltd Valve opening and closing control device in internal-combustion engine
DE3742831A1 (en) * 1987-12-17 1989-07-13 Kloeckner Humboldt Deutz Ag TWO-POINT SPRAY ADJUSTER
DE19804323A1 (en) * 1998-02-04 1999-08-05 Schaeffler Waelzlager Ohg Motor vehicle gas change valve tappet switching
US6357406B1 (en) * 2000-11-22 2002-03-19 Borgwarner Inc. Variable valve actuation system
KR100534833B1 (en) * 2004-03-26 2005-12-08 현대자동차주식회사 A variable valve lift apparatus of engine in automobile
FI124107B (en) * 2006-06-30 2014-03-14 Wärtsilä Finland Oy Piston Engine Gas Exchange Valve Control Arrangement and Method for Controlling a Piston Engine Gas Exchange Valve
CN201588701U (en) * 2009-12-11 2010-09-22 吴爽 Stepless variable valve lifting mechanism
CN103742216A (en) * 2014-01-24 2014-04-23 赵迎生 Lift-variable hydraulic tappet
CN104454070B (en) * 2014-10-27 2017-03-01 中北大学 A kind of electric-controlled hydraulic governor motion of the valve stroke continuous variable based on camshaft
CN104481625A (en) * 2014-11-13 2015-04-01 浙江师范大学 Variable valve timing system
CN104564206A (en) * 2015-01-23 2015-04-29 吉林大学 Cam-driven hydraulic fully variably valve mechanism of internal combustion engine
CN206071662U (en) * 2016-09-22 2017-04-05 西华大学 A kind of changeable air valve tappet

Also Published As

Publication number Publication date
CN106285811A (en) 2017-01-04
CN106285811B (en) 2018-10-19
CA3034548C (en) 2019-06-04
GB2568621B (en) 2019-10-09
GB2568621A (en) 2019-05-22
GB201903051D0 (en) 2019-04-24
WO2018053892A1 (en) 2018-03-29

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Legal Events

Date Code Title Description
EEER Examination request

Effective date: 20190221

MKLA Lapsed

Effective date: 20211020