Hydraulic Actuator Control System for Refuse Collection Vehicle
First Claim
1. A system for controlling motion of a hydraulic actuator on a refuse collection vehicle, the system comprising:
- (i) an operator input device configured to produce a proportional electrical signal that is proportional to the degree of motion of the operator input device;
(ii) a proportional pneumatic control valve configured to produce a pressurized air control signal in proportion to the proportional electrical signal; and
(iii) a hydraulic control valve configured to selectively control flow of hydraulic fluid to a hydraulic actuator in response to the pressurized air control signal.
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0 Petitions
Accused Products
Abstract
A system for controlling motion of a hydraulic actuator on a refuse collection vehicle. The system includes an operator input device configured to produce a proportional electrical signal that is proportional to the degree of motion of the operator input device. The system further includes a proportional pneumatic control valve that is configured to produce a pressurized air control signal in proportion to the proportional electrical signal, and a hydraulic control valve that is configured to selectively control flow of hydraulic fluid to a hydraulic actuator in response to the pressurized air control signal.
30 Citations
19 Claims
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1. A system for controlling motion of a hydraulic actuator on a refuse collection vehicle, the system comprising:
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(i) an operator input device configured to produce a proportional electrical signal that is proportional to the degree of motion of the operator input device; (ii) a proportional pneumatic control valve configured to produce a pressurized air control signal in proportion to the proportional electrical signal; and (iii) a hydraulic control valve configured to selectively control flow of hydraulic fluid to a hydraulic actuator in response to the pressurized air control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A mobile refuse collection vehicle system comprising:
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(i) a source of pressurized hydraulic fluid and a source of pressurized air; (ii) a lifter apparatus configured to interface with a refuse container; (iii) a hydraulic actuator configured to move the lifter apparatus through a range of operation; (iv) an operator input device configured to produce a proportional electrical signal that is proportional to the degree of motion of the operator input device and one or more digital signals that correspond to the direction of motion of the operator input device; (v) a proportional pneumatic control valve configured to produce a pressurized air control signal from the source of pressurized air in response to the proportional electrical signal; (vi) one or more pneumatic control valves that are configured to selectively transmit the pressurized air control signal to a pneumatic actuator in response to a digital signal; and (vii) a hydraulic control valve configured to be selectively actuated by the pneumatic actuator to control flow of a hydraulic fluid from the source of pressurized fluid to a hydraulic actuator. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A mobile refuse collection vehicle system comprising:
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(i) a source of pressurized hydraulic fluid and a source of pressurized air; (ii) a lifter apparatus configured to interface with a refuse container; (iii) a hydraulic actuator configured to move the lifter apparatus through a range of operation; (iv) an operator input device configured to produce a proportional electrical signal that is proportional to the degree of motion of the operator input device and two or more directional digital signals that correspond to the direction of motion of the operator input device; (v) a proportional pneumatic control valve configured to produce a pressurized air control signal from the source of pressurized air in response to the proportional electrical signal; (vi) two or more pneumatic control valves that are configured to selectively transmit the pressurized air control signal to a pneumatic actuator in response to the directional signals, wherein each pneumatic control valve responds to one of the directional digital signals; and (vii) a hydraulic control valve configured to be selectively actuated by the pneumatic actuator to control flow of a hydraulic fluid from the source of pressurized fluid to a hydraulic actuator.
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Specification