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US 7,008,342 B2Granted
Electro-mechanical continuously variable transmission
AssigneeSilvatech Global Systems Inc.
InventorsGerald Dyck, Paul Dries, Mohsen Bagherpour, John Czepak
Life of this patent
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Abstract
The invention comprises an electro-mechanical continuously variable transmission (EMCVT) that uses a planetary gear system to provide a combination of electric and mechanical power for a vehicle or for stationary equipment. The EMCVT includes a clutch and brake system that allows power from a energy storage unit to be combined with the main power input (typically an engine) to provide a torque output greater than that available from the main power input alone.
Claims10
An electro-mechanical continuously variable transmission comprising:
- (a) an input shaft to receive power from an engine;
- (b) an output shaft;
- (c) a generator;
- (d) a planetary gear set coupled to said input shaft, to said output shaft and to an input of said generator;
- (e) a motor coupled to said output shaft by a gear set having a fixed speed ratio;
- (f) an energy storage device coupled to said generator and to said motor and operative to accept power from and supply power to said generator and to said motor;
- (g) a controller coupled to said motor, generator and battery is operative to regulate power flow between said energy storage device and said generator, said energy storage device and said motor and between said generator and said motor;
- (h) a split speed clutch coupled to two elements of said planetary gear set and operative to lock said two elements together and permit direct transfer of all power between said generator and said input shaft;
- (i) a generator lockup brake coupled to said generator and operative to lock said generator from rotating;
- (j) a generator output clutch coupled between said generator and said motor and operative in a locked mode to lock said generator to said motor;
- and
- (k) a mechanical drive clutch coupled between one element of said planetary gear set and said output and operative to lock together the one element of said planetary gear set to said output allowing said planetary gear set to split power between said generator, said input shaft and said output shaft.
9 more elements
Dependencies are inferred from the claim text.