GB1291528A - Valve timing system in an automotive internal combustion engine - Google Patents

Valve timing system in an automotive internal combustion engine

Info

Publication number
GB1291528A
GB1291528A GB3644070A GB3644070A GB1291528A GB 1291528 A GB1291528 A GB 1291528A GB 3644070 A GB3644070 A GB 3644070A GB 3644070 A GB3644070 A GB 3644070A GB 1291528 A GB1291528 A GB 1291528A
Authority
GB
United Kingdom
Prior art keywords
cam
engine
degrees
valve
load
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.)
Expired
Application number
GB3644070A
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor 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
Priority claimed from JP44070901A external-priority patent/JPS4933289B1/ja
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of GB1291528A publication Critical patent/GB1291528A/en
Expired legal-status Critical Current

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
    • 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
    • F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings

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)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

1291528 Valve gear; regulating NISSAN MOTOR CO Ltd 28 July 1970 [30 July 1969 8 Sept 1969] 36440/70 Heading F1B A motor vehicle I.C. engine has a cam-shaft 22, Fig. 1, which is axially adjustable by hydraulic piston-and-cylinder arrangement 38, 34, to cause rocker arm 14 of engine exhaust valve 12 to be selectively actuated by a cam 30 or a cam 32. During low-speed, low-load engine operation, a manifold-vacuum-operated switch (68), Fig.3 (not shown) and a series-connected engine-speedresponsive switch (76) are both closed, so that a solenoid-actuated valve 58 is energized and assumes the position shown. Thus, pressurized fluid delivered through passage 46 is drained through open passage 48 thereby causing the camshaft 22 to be held by spring 44 in the position shown in which the rocker arm 14 is actuated by cam 30 to open the exhaust valve 50 degrees after B.D.C. and close it at T.D.C. During high-speed and/or high-load engine operation, the solenoid is de-energized so that the valve 58 closes, whereby the pressurized fluid forces piston 38 and cam-shaft 22 to the left to cause the cam 32 to become effective and open the exhaust valve 50 degrees before B.D.C. and close it 10 degrees after T.D.C. Similarly, the cam-shaft may have a pair of cams for engine inlet valve control, whereby the inlet valve is opened 10 degrees before T.D.C. and closed at 50 degrees after B.D.C.. during high engine speed and/or load, and is opened at T.D.C. and closed slightly before 50 degrees after B.D.C. during low engine speed and load.
GB3644070A 1969-07-30 1970-07-28 Valve timing system in an automotive internal combustion engine Expired GB1291528A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5964169 1969-07-30
JP44070901A JPS4933289B1 (en) 1969-09-08 1969-09-08

Publications (1)

Publication Number Publication Date
GB1291528A true GB1291528A (en) 1972-10-04

Family

ID=26400700

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3644070A Expired GB1291528A (en) 1969-07-30 1970-07-28 Valve timing system in an automotive internal combustion engine

Country Status (4)

Country Link
DE (1) DE2037705C3 (en)
FR (1) FR2053303B1 (en)
GB (1) GB1291528A (en)
SE (1) SE376459B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120320A (en) * 1982-05-17 1983-11-30 Alfa Romeo Auto Spa Device for automatically varying the timing of a camshaft
EP1409851A1 (en) * 2000-06-16 2004-04-21 Diesel Engine Retarders, Inc. Variable lost motion valve actuator and method
WO2006136294A1 (en) * 2005-06-22 2006-12-28 Gm Global Technology Operations, Inc. Device for hydraulically switching valve lift
WO2009049801A1 (en) * 2007-10-12 2009-04-23 Daimler Ag Valve train devices
WO2012079794A1 (en) * 2010-12-17 2012-06-21 Schaeffler Technologies AG & Co. KG Adjustment system for gas exchange valves of reciprocating internal combustion engines
US8776738B2 (en) 1997-12-11 2014-07-15 Jacobs Vehicle Systems, Inc Variable lost motion valve actuator and method

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025259A1 (en) * 1973-05-18 1981-01-15 Nissan Motor Valve mechanism for vehicle IC engine - has auxiliary cam between main cam and rocker arm to enable valve timing to be varied
JPS5838603B2 (en) * 1979-07-03 1983-08-24 日産自動車株式会社 Internal combustion engine valve lift device
DE3503740A1 (en) * 1985-02-05 1986-08-07 Miklos Dipl.-Ing. 6800 Mannheim Csongrady Device for adjusting the valve timing in internal combustion engines with valve timing gear
AT408127B (en) * 1992-07-13 2001-09-25 Avl Verbrennungskraft Messtech Internal combustion engine with at least one camshaft that can be axially displaced by an adjusting device
DE4230809C2 (en) * 1992-09-02 1995-03-09 Steckhan Helmut Prof Dr Valve control for internal combustion engines
DE4229186C2 (en) * 1992-09-02 1994-11-03 Steckhan Helmut Prof Dr Valve control
DE4236655A1 (en) * 1992-10-30 1994-05-05 Porsche Ag Valve drive for an internal combustion engine
DE4307707C2 (en) * 1993-03-11 1995-07-06 Sen Jakob Waal Internal combustion engine with several cylinders

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2120320A (en) * 1982-05-17 1983-11-30 Alfa Romeo Auto Spa Device for automatically varying the timing of a camshaft
US8776738B2 (en) 1997-12-11 2014-07-15 Jacobs Vehicle Systems, Inc Variable lost motion valve actuator and method
US8820276B2 (en) 1997-12-11 2014-09-02 Jacobs Vehicle Systems, Inc. Variable lost motion valve actuator and method
EP1409851A1 (en) * 2000-06-16 2004-04-21 Diesel Engine Retarders, Inc. Variable lost motion valve actuator and method
EP1409851A4 (en) * 2000-06-16 2011-11-02 Diesel Engine Retarders Inc Variable lost motion valve actuator and method
WO2006136294A1 (en) * 2005-06-22 2006-12-28 Gm Global Technology Operations, Inc. Device for hydraulically switching valve lift
WO2009049801A1 (en) * 2007-10-12 2009-04-23 Daimler Ag Valve train devices
WO2012079794A1 (en) * 2010-12-17 2012-06-21 Schaeffler Technologies AG & Co. KG Adjustment system for gas exchange valves of reciprocating internal combustion engines

Also Published As

Publication number Publication date
DE2037705B2 (en) 1973-08-16
DE2037705A1 (en) 1971-02-04
FR2053303A1 (en) 1971-04-16
SE376459B (en) 1975-05-26
DE2037705C3 (en) 1974-03-21
FR2053303B1 (en) 1973-04-27

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee