| 摘要 |
<P>PROBLEM TO BE SOLVED: To heighten reliability with a simple constitution using hydraulic pressure for both front and rear wheels in braking a construction machine or a industrial vehicle and the like at the time of emergency, and to provide a relay valve capable of supplying pressure oil in inverse proportion to pilot hydraulic pressure which can be used at the time of emergency. <P>SOLUTION: This braking device of a vehicle reduces pressure oil of a hydraulic pressure source from high pressure to low pressure corresponding to an operation amount into pilot hydraulic pressure by an emergency brake valve operated at the time of emergency, and outputs it to the relay valve. The pressure oil of the hydraulic pressure source is increased in inverse proportion from low pressure to high pressure corresponding to the pilot hydraulic pressure received by the relay valve, and outputted to a front wheel braking part, so as to emergency brake the front wheel. <P>COPYRIGHT: (C)2004,JPO |
