SPEED-BASED HYDRAULIC PUMP CONTROL SYSTEM AND METHOD FOR NOISE REDUCTION IN HYBRID VEHICLES

摘要

A speed-based system for controlling a pump displacement to control a pump flow rate of a hydraulic pump in a vehicle, such as a hybrid. The system includes a plurality of sensors, a controller, and a hydraulic pump. The controller is configured to receive data from the sensors, ascertain a speed of the vehicle, determine a target pump displacement, and transmit the target pump displacement. The target pump displacement is less than a predetermined maximum value when the speed of the vehicle is greater than a first predefined threshold, and equal to the predetermined maximum value when the speed of the vehicle is less than or equal to the first predefined threshold. The hydraulic pump is configured to ascertain an actual pump displacement, receive the target pump displacement from the controller, and alter the actual pump displacement to the target pump displacement.

主权项

1. A speed-based system for controlling a pump displacement and a pump flow rate of a hydraulic pump in a vehicle, the system comprising:
a plurality of sensors; a controller, the controller configured to
receive data from the sensors,ascertain a speed of the vehicle,determine a target pump displacement, wherein the target pump displacement is
less than a predetermined maximum value when the speed of the vehicle is greater than a first predefined threshold, andequal to the predetermined maximum value when the speed of the vehicle is less than or equal to the first predefined threshold, andtransmit the target pump displacement; and a hydraulic pump, the hydraulic pump configured to
ascertain an actual pump displacement,receive the target pump displacement from the controller, andalter the actual pump displacement to the target pump displacement.