Browse Publications Technical Papers 2019-28-0011

Design of a Novel Electro-Pneumatic Gear Shift System for a Sequential Gearbox 2019-28-0011

This paper describes the design of a novel pneumatic gear shifting system to replace the existing gear stick manual shifting system for ease of the driver while shifting gears. The aim of this work is to have a semi-automatic shifting (pneumatic shifting) removing the need for the driver clutch operation. The system consists of a solenoid valve, CO2 gas-pressurized cylinder, double-acting cylinder, and single-acting cylinder. On basis of the signal received the gear needs to be changed, the shifter opens or closes a magnetic valve assembly. The solenoid valve allows the compressed air into the piston that comes from a pressurized cylinder, in order to create the effect of shifting gears. The pedal shifter and buttons are used to shift the gears. The pedal shifter was designed by using a 3-D printing technique using PLA material. The microcontroller used is ATMEGA-328 in this system. There are three switches, one for upshift, downshift, and clutch respectively. An algorithm has been created in a microcontroller for a sequential gearbox of CBR 600RR. The system has been so developed that the above idea can be used on different types of sequential gearboxes by modifying the algorithm with input changes to the force, torque, and length of the lever required to shift the gear with respect to the amount of gas consumed. The above work can be utilized in race cars to achieve a reduction in gearshift times. On perfect implementation of the pneumatic shifting system, the driver can put both hands on the steering wheel at all times.


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