Patent ID: 7869927
Filing Date: 2011-01-11
Classification: B60T

Abstract:
1. A retarder control system for a working vehicle with an engine loaded on a vehicle body, a transmission for changing output revolutions of the engine, and driving wheels driven by the output revolutions of the transmission, the retarder control system comprising: an input shaft revolution speed detector that detects an input shaft revolution speed of the transmission; a running state acquirer that acquires a running state of the working vehicle; a threshold map storage that stores a plurality of threshold maps of the input shaft revolution speed at which retarder braking control is started or ended in accordance with a predetermined running state of the working vehicle; a threshold map selector that selects a threshold map from the threshold maps stored in the threshold map storage based on the running state acquired by the running state acquirer; and a braking controller that controls retarder braking based on the input shaft revolution speed of the transmission detected by the input shaft revolution speed detector and the threshold map selected by the threshold map selector.