Internal-combustion engines – Four-cycle – Variable clearance
Patent
1985-02-08
1986-07-29
Wolfe, Willis R.
Internal-combustion engines
Four-cycle
Variable clearance
123 48B, F02D 1504
Patent
active
046025960
ABSTRACT:
For changing the compression ratio of a reciprocating piston internal combustion engine the piston 3 consists of an outer piston part 7 and an inner piston part 10 which are connected with each other by a thread 13,14. By turning the outer piston part 7 by means of a bushing 18 which is axially fixed, but rotatable around piston axis 15 and which is in engagement with the outer piston part 7 by means of a longitudinal gear 19,20, the outer piston part 7 can be turned steplessly during operation with respect to the inner piston part 10, whereby the outer piston part 7 is displaced along the piston axis 15, thus changing the volume of the operating chamber and thereby the compression ratio.
REFERENCES:
patent: 1526244 (1925-02-01), Shannon
Audi NSU Auto Union Aktiengesellschaft
Wolfe Willis R.
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