B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
B60T 13/16 (2006.01) B60T 13/66 (2006.01) B60T 13/74 (2006.01)
Patent
CA 2066110
1604r13MS0492 223-91-0030 -26- ELECTRO HYDRAULIC SERVICE & PARKING BRAKE SYSTEM Abstract: In one embodiment the invention comprises a system (50; 200) for controlling service brake and parking functions of at least one wheel of a vehicle comprising: an electric motor (64) drivingly connected to a hydraulic pump (66) for pressurizing hydraulic fluid; the output of the pump communicated to at least one service brake (58a,b), comprising a first hydraulic cylinder (62a,b), an electronics circuit for controlling the speed of the motor (63) to regulate hydraulic pressure in the first hydraulic cylinder in response to operator braking activity (56, 64, 62), the motor and pump providing the primary means of service brake activation. The output of the pump is also communicated to a parking brake mechanism (30; 150), comprising a second hydraulic cylinder (34; 160), the parking brake mechanism having an activated mode of operation corresponding when the second hydraulic cylinder is unpressurized and a deactivated mode of operation corresponding when the second hydraulic cylinder is pressurized, and pressure control valves for controlling flow to and from the various hydraulic cylinders. A second variant of the system is disclosed in which only service brakes are electro-hydraulically controlled.
Patient Daniel Joseph
Towers Kenneth Scott
Allied-Signal Inc.
Borden Ladner Gervais Llp
LandOfFree
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