HYDRAULISCHER BETAETIGUNGSKREIS FUER EIN STUFENSCHALTGETRIEBE

摘要

This improved system for automatically varying, as a function of the conditions of operation of the engine (torque and running speed), the duration of the transitory stage when changing under torque from one gear ratio to the immediately lower gear ratio in an automatically controlled gearbox. For this purpose, there is exerted on the slide valve of the main relay valve a force which varies in accordance with said conditions, for example by employing a modulating valve which establishes a modulated pressure in a pipe.