Hydraulic system having automatic ride control

Abstract

A hydraulic system is provided for a mobile machine having a lift arm attached to a bucket and a transmission. The hydraulic system may have a hydraulic actuator configured to move the lift arm and bucket. The hydraulic system may further have an accumulator configured to store pressurized fluid and an accumulator valve configured to control fluid flow between the accumulator and the hydraulic actuator, for a ride control mode of operation configured to cushion movement of the bucket. The hydraulic system may also have a lift arm sensor associated with the mobile machine and configured to generate an angle signal indicative of an angle of the lift arm and a speed sensor associated with the mobile machine and configured to generate a speed signal indicative of the speed of the mobile machine. The hydraulic system may further have a controller in communication with the accumulator valve, the lift arm sensor, the speed sensor, and the transmission. The controller may be configured to receive the speed signal, determine a gear setting of the transmission, and receive the angle signal. The controller may also be configured to selectively activate and deactivate the ride control mode of operation based on the speed of the mobile machine and the angle of the lift arm when the gear setting of the transmission is below a minimum gear setpoint.