| 摘要 |
PURPOSE: A brake of a tractor is provided to supply optimal brake performance while changing load of a trailer withdrawn through a tractor. CONSTITUTION: A brake for a tractor comprises a brake pedal(310) generating brake force while being stepped on by a driver; an air tank(312) reserving operational liquid generating the brake force; a trailer supplying valve(316) supplying the operational liquid into a trailer(200); a relay valve(210) connected to the trailer supplying valve by being mounted on a trailer; a load sensing valve(314) detecting load of the brake; a control valve(318) controlling supply amount of the operational liquid; and double check valve(320) supplying the operational liquid into the trailer from the load sensing valve. Thereby, the brake for the tractor supplies optimal brake performance while changing load of the trailer withdrawn through the tractor.
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