International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
Semi-automatic pneumatic gear shifting Vijay Jadhav1, Harshad Murhe2, Vijendra Rathod3, Prem Vishnoi4, Prashant Vavhal5 1234Student,
Dept. of Mechanical Engineering, PK technical campus chakan, Maharashtra, India. Dept. of Mechanical Engineering, PK technical campus chakan, Maharashtra, India. ---------------------------------------------------------------------***--------------------------------------------------------------------5Guide,
Abstract - In this project, a gear shifting mechanism is
the gear position can be displayed. As further improvement, the output speed of the gearbox can be measured and used as an input for transmission control.
designed and applied to make the shifting process faster and less destructible for the driver. The new device must be reliable, with small dimensions, low construction and maintenance cost. This project aims to improve gear shifting process using devices as: a manual four speed gear box, two pneumatic double acting cylinders, two pneumatic two position five ways directional control valves, , an electrical motor, a belt, two pulleys, limit switches, push buttons, bulbs, a table (holder) and power supply. According-to suggested gear_ shifting method the driver can select the transmission gear ratio without moving his hands from the steering wheel by putting the gear shifting push buttons on the steering wheel. Using this method leaves to the driver the excitement of choosing the shifting moment.
3. SCOPE In future Use composite material to reduce weight of material and increase life of machine.
4.OBJECTIVE In manual transmission gear can be selected according to road load and driving conditions. It requires human efforts, accuracy and skills to select particular-gear under different conditions. Under city driving condition, it is difficult to shift the gear frequently while negotiating traffic. Shifting effort and shifting frequency differs with different age group and genders. It may lead to higher fuel consumption and wear and tear of the gear if it is not properly operated. To overcome these difficulties alternative arrangement is essential and one such is the push button operated gear shifting mechanism. This kind of gear shifting mechanism is very useful in four wheelers for special purpose vehicles.
Key Words: Gear Mechanism, Gear Box, buttons, pneumatic, control valves.
1.INTRODUCTION This study describes in detail in an understandable way to how to convert the traditional manually gear shifting mechanism to a semi-automated gear shifting mechanism. The development has concluded also the gearbox, which became much smoother and produces less noise. Gear shifting mechanism must be easy to use and workable, these demands are very important especially for small cars used by special needs people. For some drivers, the gear shifting can cause some confusing at driving specially at critical situations. A crowded road on a hill or a sudden detour makes a lot of tension on the driver. One of the difficulties in this situation is to choose the right reduction ratio and engaging it at the right time. This design helps the driver to increase his focusing on the road. Also reduces the time needed to engage the required reduction ratio, which increases the vehicles response.
4.CONSTRUCTION
Fig 1: layout of automatic gear box The construction of the Automatic gear box consists of the following parts.
2.PROBLEM STATEMENT Now a day, in modern vehicles, such type of gear shifting mechanism is used for power transmission. Working prototype of the push button operated gear shifting mechanism has been tested for its functionality for the entire range of gear shifting. It can be easily incorporated to four wheelers for shifting gears with minimum alternation and
Š 2017, IRJET
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Impact Factor value: 5.181
1.Base Frame The base frame is a structural element that supports the entire gear box system. The frame carries the drive system at its lower end which is consists of LH and RH rear bearing housings. The drive motor is mounted on the base frame.
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