Control system for a vehicle transmission to prevent a stopped vehicle from rolling on a slope

A control system for a vehicle transmission, comprising:

• a slope sensor for sensing degree of a slope on which the vehicle is positioned, for converting the sensed degree of slope into a first electrical signal, and for outputting the first electrical signal;
• an engine RPM sensor for detecting speed of an engine of the vehicle, converting the sensed engine speed into a second electrical signal, and for outputting the second electrical signal;
• a gear input speed sensor for sensing rotational speed of a transmission gear of the vehicle, for converting the sensed rotational speed into a third electrical signal, and for outputting the third electrical signal;
• a gear position sensor for sensing position of the transmission gear, for converting the sensed position into a fourth electrical signal, and for outputting the fourth electrical signal;
• a processor for receiving the electrical signals and, in response to the electrical signals, for generating a clutch control signal;
• a hydraulic pressure cylinder for creating hydraulic pressure in response to the clutch control signal;
• and
• a clutch cylinder for receiving the hydraulic pressure and for maintaining partial engagement of the clutch, thereby preventing the stopped vehicle from rolling down the slope.

A method of controlling a vehicle transmission, comprising:

• determining whether a throttle valve of the vehicle is closed;
• determining whether a shift lever of the vehicle is in a neutral position when the throttle valve is closed;
• separating a clutch of the vehicle when the shift lever is in the neutral position;
• determining whether the shift lever is selected to a corresponding shift stage;
• detecting joining speed of the clutch when the shift lever is selected to a corresponding shift stage;
• determining whether the vehicle is stopped on a slope;
• maintaining the clutch partially engaged when the vehicle is stopped on a slope;
• and
• joining the clutch at the detected clutch joining speed.