Arrangement for the control of valve timing in a combustion engi

Details Arrangement for the control of valve timing in a combustion engi Arrangement for the control of valve timing in a combustion engi

1995-05-31

1996-09-24

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123 9016, 123 9022, F01L 134, F01L 902

Patent

active

055580505

ABSTRACT:
The invention relates to arrangement for controlling valve timing in a combustion engine, especially in a large diesel engine with several cylinders, in which the control of a valve (11) in a cylinder is carried out through a follower member (3,4), preferably a roll follower, receiving its guidance from a cam race (2a) of a camshaft (2) or the like. There are at least two follower members (3,4) per controlled valve (11), said follower members (3,4) being functionally independent from each other and arranged in cooperation with the same cam race (2a) so that their control effect on the valve (11) is different. Only one follower member (3,4) is at a time in force transmission connection with the valve (11) in the cylinder. In addition the arrangement includes means (7) for selecting the follower member (3,4) to be used in each case so that the control of the valve (11) corresponds as well as possible to the operating conditions of the engine in each case.

REFERENCES:
patent: 2829628 (1958-04-01), Smiltneek
patent: 3139077 (1964-06-01), Beucher
patent: 4258672 (1981-03-01), Hietikko
patent: 4469056 (1984-09-01), Tourtelot, Jr. et al.
patent: 4799462 (1989-01-01), Tittizer et al.
patent: 4848285 (1989-07-01), Konno
patent: 5002022 (1991-03-01), Perr
patent: 5197419 (1993-03-01), Dingess

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