APPARATUS FOR LEARNING THE LINE PRESSURE OF A CONTINUOUSLY VARIABLE TRANSMISSION CAPABLE OF LEARNING AND REVISING LINE PRESSURE USING PRESSURE WHICH IS PROVIDED TO AN IDLER PULLEY AND A METHOD THEREOF

摘要

PURPOSE: An apparatus for learning the line pressure of a continuously variable transmission and a method thereof are provided to improve shift efficiency and fuel efficiency by learning controlling line pressure and optimally controlling actual line pressure.;CONSTITUTION: An oil pan(11) stores transmission oil. An oil pump(13) transfers the transmission oil to engine power. A line pressure controlling valve(15) forms line pressure by controlling the supply quantity of transferred transmission oil. An idler pressure controlling valve(17) controls the pressure of the transmission oil which is provided to an idler pulley. An idler pulley pressure sensor(21) detects the pressure of the transmission oil which is provided to the idler pulley. A controller(23) controls to learn the line pressure which is controlled by the line pressure controlling valve, to apply a learned value, and to revise the line pressure.;COPYRIGHT KIPO 2012