Active vehicle suspension system
First Claim
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1. An active suspension system, comprising:
- a first hydraulic suspension actuator, operatively interposed between a vehicle wheel assembly and a vehicle body, that applies a first force;
a second suspension actuator, with a slower response than the first hydraulic suspension actuator, operatively interposed between the vehicle wheel assembly and the vehicle body, that applies a second force;
an active roll stabilizer system that applies a third force; and
a controller that operates the first hydraulic suspension actuator, the second suspension actuator, and the active roll stabilizer system to cooperatively apply the first, second, and third forces to control the relative motion between the wheel assembly and the vehicle body in at least one mode of operation of the active suspension system.
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Abstract
A method of on-demand energy delivery to an active suspension system comprising an actuator body, hydraulic pump, electric motor, plurality of sensors, energy storage facility, and controller is provided. The method comprises disposing an active suspension system in a vehicle between a wheel mount and a vehicle body, detecting a wheel event requiring control of the active suspension; and sourcing energy from the energy storage facility and delivering it to the electric motor in response to the wheel event.
45 Citations
15 Claims
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1. An active suspension system, comprising:
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a first hydraulic suspension actuator, operatively interposed between a vehicle wheel assembly and a vehicle body, that applies a first force; a second suspension actuator, with a slower response than the first hydraulic suspension actuator, operatively interposed between the vehicle wheel assembly and the vehicle body, that applies a second force; an active roll stabilizer system that applies a third force; and a controller that operates the first hydraulic suspension actuator, the second suspension actuator, and the active roll stabilizer system to cooperatively apply the first, second, and third forces to control the relative motion between the wheel assembly and the vehicle body in at least one mode of operation of the active suspension system. - View Dependent Claims (2, 3, 4)
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5. A method of controlling a vehicle body motion, the method comprising:
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applying a first force on the vehicle body with a first hydraulic suspension actuator operatively interposed between a vehicle wheel assembly of the vehicle and the vehicle body; applying a second force on the vehicle body, simultaneously with the first force in at least one mode of operation, with a second suspension actuator, wherein the second suspension actuator has a slower response than the first hydraulic suspension actuator, and wherein the second suspension actuator is operatively interposed between the vehicle wheel assembly of the vehicle and the vehicle body; and
,applying a third force with an active roll stabilizer system, simultaneously with the first and the second forces, in at least one mode of operation; controlling the first, second, and third forces to cooperatively control relative motion between the vehicle body and the wheel assembly. - View Dependent Claims (6, 7, 8)
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9. An active suspension system, comprising:
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a first hydraulic suspension actuator, with a response time that is less than 150 ms, operatively interposed between a vehicle wheel assembly and a vehicle body, that applies a first force; a second actuator, with a slower response than the first hydraulic suspension actuator, interposed between the vehicle wheel assembly and the vehicle body, that applies a second force; and
,a controller that operates the first hydraulic suspension actuator and the second actuator to cooperatively apply the first and second forces to control the relative motion between the wheel assembly and the vehicle body in at least one mode of operation of the active suspension system. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification