FR2357731A1 - Variable lift valve mechanism in IC engine - reduces lift of inlet valve in accordance with increase in suction pressure - Google Patents
Variable lift valve mechanism in IC engine - reduces lift of inlet valve in accordance with increase in suction pressureInfo
- Publication number
- FR2357731A1 FR2357731A1 FR7620927A FR7620927A FR2357731A1 FR 2357731 A1 FR2357731 A1 FR 2357731A1 FR 7620927 A FR7620927 A FR 7620927A FR 7620927 A FR7620927 A FR 7620927A FR 2357731 A1 FR2357731 A1 FR 2357731A1
- Authority
- FR
- France
- Prior art keywords
- lift
- rocker arm
- engine
- accordance
- increase
- 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
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
- F01L13/0021—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 rocker arm ratio
-
- 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
Abstract
The inlet valve (12) is operated by a rocker arm (14) against the action of the closing spring (13). The rocker arm is moved by a push rod (20) which is lifted by a cam (16). An adjusting lever (22) has an end (23) between the push rod and the rocker arm. This end is spherical. The other end is pinned (28) to an eccentric (29) on the end of an operating lever (32) whose other end is connected to the piston (34) of a membrane actuator (35). The actuator is subjected to the manifold suction presure so that when the pressure increases the operating lever (32) moves the adjusting lever (22) so that the point of contact (P) on the rocker arm moves to reduce the valve opening lift.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7620927A FR2357731A1 (en) | 1976-07-08 | 1976-07-08 | Variable lift valve mechanism in IC engine - reduces lift of inlet valve in accordance with increase in suction pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7620927A FR2357731A1 (en) | 1976-07-08 | 1976-07-08 | Variable lift valve mechanism in IC engine - reduces lift of inlet valve in accordance with increase in suction pressure |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2357731A1 true FR2357731A1 (en) | 1978-02-03 |
FR2357731B1 FR2357731B1 (en) | 1980-09-19 |
Family
ID=9175428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7620927A Granted FR2357731A1 (en) | 1976-07-08 | 1976-07-08 | Variable lift valve mechanism in IC engine - reduces lift of inlet valve in accordance with increase in suction pressure |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2357731A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2453979A1 (en) * | 1979-04-13 | 1980-11-07 | Nissan Motor | VALVE CONTROL MECHANISM FOR INTERNAL COMBUSTION ENGINES |
EP0111768A1 (en) * | 1982-12-23 | 1984-06-27 | FIAT AUTO S.p.A. | A mechanical device for controlling a valve of a heat engine |
EP0717174A1 (en) * | 1994-12-12 | 1996-06-19 | Isuzu Motors Limited | Valve operating system for internal combustion engine |
DE10066054B4 (en) * | 2000-07-18 | 2006-07-13 | Thyssenkrupp Automotive Ag | Hub valve control for engines |
DE102017119348A1 (en) * | 2017-08-24 | 2019-02-28 | Man Truck & Bus Ag | Variable valve train |
-
1976
- 1976-07-08 FR FR7620927A patent/FR2357731A1/en active Granted
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2453979A1 (en) * | 1979-04-13 | 1980-11-07 | Nissan Motor | VALVE CONTROL MECHANISM FOR INTERNAL COMBUSTION ENGINES |
EP0111768A1 (en) * | 1982-12-23 | 1984-06-27 | FIAT AUTO S.p.A. | A mechanical device for controlling a valve of a heat engine |
EP0717174A1 (en) * | 1994-12-12 | 1996-06-19 | Isuzu Motors Limited | Valve operating system for internal combustion engine |
DE10066054B4 (en) * | 2000-07-18 | 2006-07-13 | Thyssenkrupp Automotive Ag | Hub valve control for engines |
DE102017119348A1 (en) * | 2017-08-24 | 2019-02-28 | Man Truck & Bus Ag | Variable valve train |
US10619527B2 (en) | 2017-08-24 | 2020-04-14 | Man Truck & Bus Ag | Variable valve train |
Also Published As
Publication number | Publication date |
---|---|
FR2357731B1 (en) | 1980-09-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Change of name or company name | ||
TP | Transmission of property | ||
ST | Notification of lapse |