US 7,546,914 B2 · All-wheel transmission system

Abstract

An all-wheel transmission system includes an input shaft, a first output shaft and two mutually independently controllable friction clutches for the metering the transfer of drive torque from a powertrain to a first axle assembly and a second axle assembly. The first friction clutch includes a first clutch component rotationally connected to an input shaft and of a second clutch component rotationally connected to a first output shaft while the second friction clutch includes a first clutch component rotationally connected to the input shaft and a second clutch component rotationally connected to a second output shaft. One of the friction clutches can be selectively bridged via coordinate actuation of a bridging clutch.

Claims22

Dependent claims

An all-wheel transmission system comprising two mutually independent clutches operable for controlling the transfer of drive torque from a powertrain to a first axle and a second axle, wherein an input shaft is drivingly connectable to a first output shaft associated with the first axle via a first controllable friction clutch and to a second output shaft associated with the second axle via a second controllable friction clutch wherein:

said first friction clutch includes of a first component rotationally connected to said input shaft, a second component rotationally connected to said first output shaft and a first actuator for actuating said first friction clutch;
said second friction clutch includes a first component rotationally connected to said input shaft, a second component rotationally connected to said second output shaft and a second actuator for actuating said second friction clutch;
and
a bridging clutch arranged in parallel to one of said first and second friction clutches to selectively operate said one of the first and second friction clutches in a locked mode.

1 more element

An all-wheel transmission system for controlling transfer of drive torque from a powertrain to first and second drivelines, comprising:

an input shaft driven by the powertrain;
a first output shaft driving the first driveline;
a second output shaft driving the second driveline;
a first friction clutch having a first clutch component driven by said input shaft, a second clutch component driving said first output shaft, a first clutch pack operably disposed between said first and second clutch components, and a first actuator for controlling engagement of said first clutch pack;
a second friction clutch having a first clutch component driven by said input shaft, a second clutch component driving said second output shaft, a second clutch pack operably disposed between said first and second clutch components, and a second actuator for controlling engagement of said second clutch pack;
and
a bridging clutch associated with said first friction clutch that is operable for coupling said first clutch component of said first friction clutch to said second clutch component of said first friction clutch when said first actuator is released from engagement with said first clutch pack.

4 more elements

Dependencies are inferred from the claim text.

All-wheel transmission system

Life of this patent

All-wheel transmission system

Life of this patent

Abstract

Claims22