On-demand two-speed transfer case for four-wheel drive hybrid vehicle
First Claim
1. A transfer case for use in a motor vehicle having an engine and first and second drivelines, comprising:
- an input shaft adapted to be driven by the engine;
a mainshaft;
a first clutch for coupling said input shaft to said mainshaft;
a first output shaft adapted for connection to the first driveline;
a second output shaft adapted for connection to the second driveline;
a reduction unit having an input member driven by said mainshaft, a reaction member, and an output member driving said first output shaft;
a second clutch for coupling said input shaft to said output member of said reduction unit;
a third clutch for coupling said reaction member of said reduction unit to a stationary member; and
an electric motor for selectively driving said mainshaft.
0 Assignments
0 Petitions
Accused Products
Abstract
A hybrid transfer case includes a mainshaft, front and rear output shafts, an electric motor/generator connected to the mainshaft, and an input clutch for selectively coupling the transmission to the mainshaft. The transfer case further includes a planetary gearset having a sun gear driven by the mainshaft, a ring gear, and planet gears supported from a carrier. A direct clutch is operable to selectively couple the rear output shaft for rotation with the input shaft. A low brake is operable to selectively brake rotation of the ring gear. A transfer clutch controls the amount of drive torque delivered through a transfer assembly to the front output shaft. A hybrid control system is provided for controlling actuation of the various clutch and brake assemblies and the electric motor/generator to establish various drive modes.
-
Citations
39 Claims
-
1. A transfer case for use in a motor vehicle having an engine and first and second drivelines, comprising:
-
an input shaft adapted to be driven by the engine;
a mainshaft;
a first clutch for coupling said input shaft to said mainshaft;
a first output shaft adapted for connection to the first driveline;
a second output shaft adapted for connection to the second driveline;
a reduction unit having an input member driven by said mainshaft, a reaction member, and an output member driving said first output shaft;
a second clutch for coupling said input shaft to said output member of said reduction unit;
a third clutch for coupling said reaction member of said reduction unit to a stationary member; and
an electric motor for selectively driving said mainshaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. A transfer case for use in a motor vehicle having an engine and first and second drivelines, comprising:
-
an input shaft adapted to be driven by the engine;
a mainshaft;
a first clutch for selectively coupling said input shaft to said mainshaft;
a first output shaft adapted for connection to the first driveline;
a second output shaft adapted for connection to the second driveline;
a reduction unit driven by said mainshaft and having an output member operably connected to said first output shaft;
a second clutch for selectively coupling said input shaft to said output member;
an electric motor for selectively driving said mainshaft; and
a control system for controlling actuation of said first clutch, said second clutch and said electric motor. - View Dependent Claims (21, 22, 23, 24, 25)
a valvebody supporting a first electrohydraulic valve controlling actuation of said first clutch, and a second electrohydraulic valve controlling actuation of said second clutch; and
a hydraulic circuit providing high pressure fluid to said first, and second valves.
-
-
25. The transfer case of claim 20 further comprising a third clutch for selectively coupling a reaction member of said reduction unit to a stationary component, and wherein said control system is operable for controlling actuation of said third clutch.
-
26. A hybrid motor vehicle, comprising:
-
a powertrain including an internal combustion engine and a transmission;
a first driveline including a first axle driving a pair of first wheels;
a second driveline including a second axle driving a pair of second wheels;
a transfer case including an input shaft driven by said powertrain, a mainshaft, a first clutch for selectively coupling said input shaft to said mainshaft, a first output shaft operably connected to said first driveline, a second output shaft operably connected to said second driveline, a reduction unit having an input member driven by said mainshaft, a reaction member, and an output member fixed to said first output shaft, a second clutch for selectively coupling said input shaft to said first output shaft, a third clutch for selectively coupling said reaction member to a stationary component, and an electric motor for driving said mainshaft; and
a control system for controlling actuation of said first clutch, said second clutch, said third clutch and said electric motor for defining an electric drive mode, a hybrid drive mode and a powertrain drive mode. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
-
Specification