Controller of work vehicle
First Claim
1. A control apparatus for a work vehicle provided with a hydraulic stepless transmission for transmitting power from an engine mounted on a traveling body equipped with travel wheels, a speed change pedal for changing a speed change ratio of the hydraulic stepless transmission, a forward drive clutch and a reverse drive clutch that transmit a transmission drive output from the hydraulic stepless transmission to the travel wheels, and a brake for braking the travel wheels, the control apparatus comprising:
- a transmission sensor that detects a step-on amount of the speed change pedal;
a transmission output unit rotation sensor that detects a revolution speed of the output shaft; and
a controller;
wherein the control apparatus conducting control so that any one of the forward drive clutch and reverse drive clutch is engaged in response to a step-on actuation of the speed change pedal when the transmission drive output detected by the transmission output unit rotation sensor is no greater than a forward-reverse drive switching speed, and that the brake of the travel wheels is released when the activation of any of the forward drive clutch and reverse drive clutch is confirmed.
2 Assignments
0 Petitions
Accused Products
Abstract
Various works of a tractor or wheel loader that require frequent operations of start, stop, and switching between the forward drive and reverse drive that are repeated alternately can be performed very easily. The control apparatus comprises a speed change sensor that detects the step-on amount of a speed change pedal, an actuator that regulates the swash plate angle of a hydraulic pump based on the detection value of the speed change sensor, a transmission output unit rotation sensor that detects the revolution speed of an output shaft, and a control unit. The control unit performs control such that when the speed change pedal is not stepped on, a brake is applied to the travel wheels and both the forward drive clutch and the reverse drive clutch are disengaged, and also performs control such that when the transmission drive output detected with the transmission output unit rotation sensor is not more than that the forward-reverse drive switching speed, either the forward drive clutch or the reverse drive clutch is engaged as the speed change pedal is stepped on. When the engagement of the forward drive clutch or reverse drive clutch is confirmed, the brake of the travel wheels is released.
60 Citations
12 Claims
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1. A control apparatus for a work vehicle provided with a hydraulic stepless transmission for transmitting power from an engine mounted on a traveling body equipped with travel wheels, a speed change pedal for changing a speed change ratio of the hydraulic stepless transmission, a forward drive clutch and a reverse drive clutch that transmit a transmission drive output from the hydraulic stepless transmission to the travel wheels, and a brake for braking the travel wheels, the control apparatus comprising:
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a transmission sensor that detects a step-on amount of the speed change pedal;
a transmission output unit rotation sensor that detects a revolution speed of the output shaft; and
a controller;wherein the control apparatus conducting control so that any one of the forward drive clutch and reverse drive clutch is engaged in response to a step-on actuation of the speed change pedal when the transmission drive output detected by the transmission output unit rotation sensor is no greater than a forward-reverse drive switching speed, and that the brake of the travel wheels is released when the activation of any of the forward drive clutch and reverse drive clutch is confirmed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification