F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
180/39, 138/56.1
F16H 61/46 (2006.01) B60K 17/356 (2006.01) B62D 59/02 (2006.01)
Patent
CA 1311988
ABSTRACT OF THE DISCLOSURE An automatic control system for the transfer of the drive power between a tractor and a trailer, which said system comprises a closed hydraulic circuit that operates the drive wheels of the tractor and an open hydraulic circuit that operates the drive wheels of the trailer. In the system, the closed hydraulic circuit of the tractor comprises a pump and a hydraulic motor driven by the pump and, in a corresponding way, the open hydraulic circuit of the trailer comprises a motor or motors driven by a pump. The control system comprises a line that transmits a control pressure from the closed circuit of the trac- tor to the open circuit of the trailer. When the resistance to traction increases, e.g. when driven up a steep hill, the pres- sure in said transmitting line increases and, by means of said pressure, the hydraulic pump of the trailer, which is advanta- geously an adjustable-displacement pump, is controlled to produce a higher pressure to the motor or motors driven by the pump. In a corresponding way, when the drive power requirement of the tractor becomes lower, the operating pressure in the hydraulic circuit of the drive power transmission in the trailer is low- ered.
594644
Marks & Clerk
Normet Oy
LandOfFree
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