Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1991-07-25
1992-08-18
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9031, 464 2, F01L 134, F01L 104
Patent
active
051389851
ABSTRACT:
An arrangement for changing the valve timing of an internal-combustion engine has a camshaft, which can be rotated relative to a shaft driving it. The camshaft has a phase converter with a piston which is hydraulically acted upon on both sides. In the camshaft, an axial recess is arranged in which an inserted pipe separates two spaces from one another. An on/off valve fed from the oil circulating system, in one position, via one of the spaces, supplies the piston with pressure oil so that this piston is axially shifted into a first end position and in the process rotates the camshaft. In a second position, the piston, by way of the second space is axially pushed back by pressure oil.
REFERENCES:
patent: 5058539 (1991-10-01), Saito et al.
Ampferer Herbert
Schultz Willi
Szodfridt Imre
Cross E. Rollins
Dr. Ing. h.c.F. Porsche AG
Lo Weilun
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