GB2157364A - I.C. engine variable valve timing device - Google Patents

I.C. engine variable valve timing device Download PDF

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Publication number
GB2157364A
GB2157364A GB08403213A GB8403213A GB2157364A GB 2157364 A GB2157364 A GB 2157364A GB 08403213 A GB08403213 A GB 08403213A GB 8403213 A GB8403213 A GB 8403213A GB 2157364 A GB2157364 A GB 2157364A
Authority
GB
United Kingdom
Prior art keywords
oil
unit
valve timing
drive shaft
gallery
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.)
Withdrawn
Application number
GB08403213A
Other versions
GB8403213D0 (en
Inventor
Alan John Graham
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB08403213A priority Critical patent/GB2157364A/en
Publication of GB8403213D0 publication Critical patent/GB8403213D0/en
Publication of GB2157364A publication Critical patent/GB2157364A/en
Withdrawn legal-status Critical Current

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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
    • F01L1/34—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
    • F01L1/344—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 changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442—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 changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

To vary the position of an outer driven member 4 relative to the inner driving member 2 chambers 5 defined between the members are filled with the desired amount of oil supplied under pressure from the engine oil pump (not shown) via fill and dump valve 7. In this way the outer member 4 is advanced due to the hydraulic action of the oil against the driven member 2 thus overcoming the reflected loading on the outer member 4 due to the camshaft compressing the valve springs. <IMAGE>

Description

SPECIFICATION Variable timing device This device relates to the valve timing on an internal combustion engine.
The valve timing on conventional engines is normally fixed at some predetermined design compromise and is almost universally manufactured in this way.
The present device is intended to enable manufacturers to select the optimum timing angles relative to engine RPM, with the resultant benefits.
This invention will now be described with reference to Figs. 1 and 2.
The complete assembly is mounted on a drive shaft 1, the inner member 2 is keyed 3 on to the drive shaft 2, The outer driven member 4 is free to advance its relative position due to oil being pumped into the gallery(s) 5 via drilling(s) 6. The amount of advance is governed by a fill and dump valve 7 which may be controlled by a micro processor tailored to the individual engine characteristics. The unit is retained by a bolt 8 and washer 9. The oil is fed into the unit via a suitably sealed swivel 10, the complete assembly is made oil tight by using the appropriate seals. The limit of advance is dependant on gallery size, where the outer member will stop against the inner member 2. A drilling 11 is provided for venting purposes but in certain embodiments may be omitted to assist the dump speed of the oil in the unit.
Fig. 2 is shown with the outer member 4 in the fuily advanced position, the gallery 5 being full of oil. It can be seen that the outer driven member 4 is pressing on the inner driving member 2 this being the limit of angular movement. The unit is closed with plate 12 and sealed by cavity and '0' ring 13, (typical arrangement).
1. A variable valve timing device may be incorporated either by direct mounting on camshaft, or main drive shaft and may be used for gear, belt or chain drives as the unit is oil tight.
2. Any application where the previously described design principle may be employed, an obvious example being ignition timing or indexing applications.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (2)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Variable timing device This device relates to the valve timing on an internal combustion engine. The valve timing on conventional engines is normally fixed at some predetermined design compromise and is almost universally manufactured in this way. The present device is intended to enable manufacturers to select the optimum timing angles relative to engine RPM, with the resultant benefits. This invention will now be described with reference to Figs. 1 and 2. The complete assembly is mounted on a drive shaft 1, the inner member 2 is keyed 3 on to the drive shaft 2, The outer driven member 4 is free to advance its relative position due to oil being pumped into the gallery(s) 5 via drilling(s) 6. The amount of advance is governed by a fill and dump valve 7 which may be controlled by a micro processor tailored to the individual engine characteristics. The unit is retained by a bolt 8 and washer 9. The oil is fed into the unit via a suitably sealed swivel 10, the complete assembly is made oil tight by using the appropriate seals. The limit of advance is dependant on gallery size, where the outer member will stop against the inner member 2. A drilling 11 is provided for venting purposes but in certain embodiments may be omitted to assist the dump speed of the oil in the unit. Fig. 2 is shown with the outer member 4 in the fuily advanced position, the gallery 5 being full of oil. It can be seen that the outer driven member 4 is pressing on the inner driving member 2 this being the limit of angular movement. The unit is closed with plate 12 and sealed by cavity and '0' ring 13, (typical arrangement). CLAIMS
1. A variable valve timing device may be incorporated either by direct mounting on camshaft, or main drive shaft and may be used for gear, belt or chain drives as the unit is oil tight.
2. Any application where the previously described design principle may be employed, an obvious example being ignition timing or indexing applications.
GB08403213A 1984-02-07 1984-02-07 I.C. engine variable valve timing device Withdrawn GB2157364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08403213A GB2157364A (en) 1984-02-07 1984-02-07 I.C. engine variable valve timing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08403213A GB2157364A (en) 1984-02-07 1984-02-07 I.C. engine variable valve timing device

Publications (2)

Publication Number Publication Date
GB8403213D0 GB8403213D0 (en) 1984-03-14
GB2157364A true GB2157364A (en) 1985-10-23

Family

ID=10556216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08403213A Withdrawn GB2157364A (en) 1984-02-07 1984-02-07 I.C. engine variable valve timing device

Country Status (1)

Country Link
GB (1) GB2157364A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217386A (en) * 1988-04-08 1989-10-25 Ford Motor Co Diesel engine glowplug installation
FR2644543A1 (en) * 1989-03-17 1990-09-21 Renault
EP0422791A1 (en) * 1989-10-10 1991-04-17 General Motors Corporation Compact camshaft-phasing drive
US5119691A (en) * 1989-10-10 1992-06-09 General Motors Corporation Hydraulic phasers and valve means therefor
US5163872A (en) * 1989-10-10 1992-11-17 General Motors Corporation Compact camshaft phasing drive
WO1994010429A1 (en) * 1992-11-04 1994-05-11 Robert Bosch Gmbh Process for driving a device for relatively rotating a shaft and device for relatively rotating the shaft of an internal combustion engine
US5823152A (en) * 1995-06-14 1998-10-20 Nippondenso Co., Ltd. Control apparatus for varying a rotational or angular phase between two rotational shafts, preferably applicable to a valve timing control apparatus for an internal combustion engine
US6006709A (en) * 1995-06-14 1999-12-28 Nippondenso Co., Ltd. Control apparatus for varying a rotational or angular phase between two rotational shafts, preferably applicable to a valve timing control apparatus for an internal combustion engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1241923A (en) * 1968-12-19 1971-08-04 Eaton Yale & Towne Engine control device
GB1303528A (en) * 1969-07-15 1973-01-17
GB1509413A (en) * 1974-06-10 1978-05-04 Nissan Motor Self-adjustable camshaft drive mechanism
GB2017209A (en) * 1978-03-24 1979-10-03 Alfa Romeo Spa Timing variator for the timing system of a reciprocating iternal combustion engine
GB2109858A (en) * 1981-11-25 1983-06-08 Ford Motor Co Valve timing control for an internal combustion engine
GB2120320A (en) * 1982-05-17 1983-11-30 Alfa Romeo Auto Spa Device for automatically varying the timing of a camshaft

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1241923A (en) * 1968-12-19 1971-08-04 Eaton Yale & Towne Engine control device
GB1303528A (en) * 1969-07-15 1973-01-17
GB1509413A (en) * 1974-06-10 1978-05-04 Nissan Motor Self-adjustable camshaft drive mechanism
GB2017209A (en) * 1978-03-24 1979-10-03 Alfa Romeo Spa Timing variator for the timing system of a reciprocating iternal combustion engine
GB2109858A (en) * 1981-11-25 1983-06-08 Ford Motor Co Valve timing control for an internal combustion engine
GB2120320A (en) * 1982-05-17 1983-11-30 Alfa Romeo Auto Spa Device for automatically varying the timing of a camshaft

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217386A (en) * 1988-04-08 1989-10-25 Ford Motor Co Diesel engine glowplug installation
FR2644543A1 (en) * 1989-03-17 1990-09-21 Renault
EP0397540A1 (en) * 1989-03-17 1990-11-14 Regie Nationale Des Usines Renault Camshaft for engine with variable valve timing
EP0422791A1 (en) * 1989-10-10 1991-04-17 General Motors Corporation Compact camshaft-phasing drive
US5119691A (en) * 1989-10-10 1992-06-09 General Motors Corporation Hydraulic phasers and valve means therefor
US5163872A (en) * 1989-10-10 1992-11-17 General Motors Corporation Compact camshaft phasing drive
WO1994010429A1 (en) * 1992-11-04 1994-05-11 Robert Bosch Gmbh Process for driving a device for relatively rotating a shaft and device for relatively rotating the shaft of an internal combustion engine
US5823152A (en) * 1995-06-14 1998-10-20 Nippondenso Co., Ltd. Control apparatus for varying a rotational or angular phase between two rotational shafts, preferably applicable to a valve timing control apparatus for an internal combustion engine
GB2302391B (en) * 1995-06-14 1999-08-18 Nippon Denso Co Control apparatus for varying the rotational or angular phase between two rotational shafts
US5960757A (en) * 1995-06-14 1999-10-05 Nippondenso Co., Ltd. Controlling apparatus for varying a rotational or angular phase between two rotational shafts
US6006709A (en) * 1995-06-14 1999-12-28 Nippondenso Co., Ltd. Control apparatus for varying a rotational or angular phase between two rotational shafts, preferably applicable to a valve timing control apparatus for an internal combustion engine
US6155221A (en) * 1995-06-14 2000-12-05 Nippondenso Co., Ltd. Control apparatus for varying a rotational or angular phase between two rotational shafts, preferably applicable to a valve timing control apparatus for an internal combustion engine
US6199524B1 (en) 1995-06-14 2001-03-13 Nippondenso Co., Ltd. Control apparatus for varying a rotational or angular phase between two rotational shafts

Also Published As

Publication number Publication date
GB8403213D0 (en) 1984-03-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)