Internal-combustion engines – Four-cycle – Variable clearance
Patent
1980-12-08
1985-08-20
Lall, Parshotam S.
Internal-combustion engines
Four-cycle
Variable clearance
123 48B, F02B 7504
Patent
active
045357307
ABSTRACT:
An internal combustion engine that has automatic stroke length control and independent compression ratio control. The engine is of the reciprocating piston type using conventional valving and intake and exhaust manifolding. Stroke length control is effected by a first planetary gear set driven in oscillation by the piston and a clutch mechanism which selectively locks the gear set to oscillate through either a long arc length for the long stroke or a short arc length for short stroke. Compression ratio adjustment, as well as piston top dead center phasing during and after clutching, is effected by a second planetary gear set driven in oscillation by the piston and a servo-motor for varying the phase of oscillation of the second planetary gear set to shift the top dead center position of the piston as desired independently of the length of stroke of the piston.
REFERENCES:
patent: 1112832 (1914-10-01), Pierce
patent: 1786423 (1930-12-01), Cady
patent: 1901263 (1933-03-01), Ruud
patent: 1978058 (1934-10-01), Peterson
patent: 3511102 (1970-05-01), Brandes
patent: 3633552 (1972-01-01), Huber
patent: 3686972 (1972-08-01), McWhorter
patent: 4111164 (1978-09-01), Wuerfel
patent: 4173202 (1979-11-01), Crise
patent: 4380972 (1983-04-01), Parkins
Lall Parshotam S.
Wolfe W. R.
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