192 clutches and power-stop control – Clutches – Automatic
Patent
1998-07-02
2000-08-15
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Automatic
192 57, 192 5841, 74650, F16D 3500, B60K 1735
Patent
active
061021784
ABSTRACT:
A center differential device (17) for use in a four wheel drive system, the device including a viscous coupling (29), a ball ramp actuator (31), and a clutch pack (33). Under normal driving conditions, most of the torque is transmitted to the front drive wheels (11), and the device (17) rotates as a unit. If the front wheels (11) begin to slip, the input shaft (15) and input coupling member (35) rotate faster than the output coupling member (43), thus transmitting torque to the output coupling member (43). This torque is transmitted to the first ramp plate (51) of the ball ramp actuator (31), displacing the actuator from its neutral position (FIG. 3), such that the second ramp plate (52) begins to load the clutch pack (33) and transmit torque from the housing (25) to the output shaft (19), and from there to the rear drive wheels (23). With the present invention, for any given amount of front wheel slip, a predetermined amount of torque may be transmitted automatically to the rear drive wheels (23), the viscous coupling (29) providing a "speed sensitive" input to the ball ramp actuator (31), without the need for any separate controls, sensors, etc.
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Bonck Rodney H.
Eaton Corporation
Kasper L. J.
LandOfFree
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