Hybrid transmission with dual-drive pump
AssigneeFord Global Technologies, LLC
InventorsGregory Daniel Goleski, David Allen Janson, Jeffrey Edward Maurer, Matthew David Hammond
Life of this patent
Estimating the term…
Abstract
In a pump system for a hybrid electric transmission, the pump is alternately driven by the input shaft and the output shaft, whichever is rotating faster. The input shaft and output shaft are co-axial. Sprockets and a chain transmit power from axis of the input and output shafts to the axis of the pump. The driven sprocket is selectively coupled to the input shaft by a first one-way-clutch and selectively coupled to the output shaft by a second one-way-clutch. Two alternative one-way-clutch and bearing arrangement are disclosed.
Claims15
A hybrid transmission comprising:
- an input shaft adapted for fixation to an internal combustion engine;
- an output shaft co-axial with the input shaft and driveably connected to a differential;
- a motor configured to propel the output shaft with the input shaft stationary;
- a driving sprocket selectively coupled to the input shaft by a first one-way-clutch and selectively coupled to the output shaft by a second one-way-clutch;
- a driven sprocket;
- a chain engaging both the driving sprocket and the driven sprocket;
- and
- a pump driveably connected to the driven sprocket.
A hybrid transmission comprising:
- first and second sprockets drivably connected to one another by a chain, the first sprocket selectively coupled to an input shaft by a first one-way-clutch and selectively coupled to an output shaft by a second one-way-clutch;
- a first electric machine configured to propel the output shaft with the input shaft stationary;
- and
- a pump driven by the second sprocket.
A pump system for a hybrid transmission comprising:
- first and second sprockets drivably connected to one another by a chain, the first sprocket selectively coupled to an input shaft by a first one-way-clutch and selectively coupled to an output shaft by a second one-way-clutch, the input shaft adapted for connection to an internal combustion engine and the output shaft adapted to drive vehicle wheels;
- and
- a pump driven by the second sprocket.
Dependencies are inferred from the claim text.