TRANSMISSION FOR ACTIVATING ENGINE BRAKE AUTOMATICALLY AND METHOD THEREOF

摘要

PURPOSE: A transmission for the automatic use of an engine brake and a method thereof are provided to implement an engine brake function by inducing down shifting forcibly without additional operations until a vehicle stops through inducing a driver to operate a shifting gear to the position of a retardation stage more than once. CONSTITUTION: A detection part detects the generation of an acceleration stage signal or a retardation stage signal according to the position of a shifting gear. A control part determines whether the determination of the automatic execution of an engine brake is ready to be performed in an inactive state(300). The control part converts the inactive state into a determining state(310). The control part performs the engine brake automatic execution determination in a determining state. The control part receives the retardation stage signal from a detection part. The control part is converted into a detection state(320). The control part shifts gear to a lower stage forcibly for securing an engine brake function. [Reference numerals] (300) Inactive state; (310) Determining state; (320) Detection state; (AA) D stage && Manual && throttle open = 0% && vehicle speed >= constant vehicle speed && transmission >= constant stage; (BB,CC) Not D stage or Not Manual or vehicle speed <= constant vehicle speed or throttle open >= constant number % or TIP + operation or first stage; (DD) Cumulative brake On time > a seconds && TIP-signal >= b time detections