3. POBLEM DEFINITION
• The problem which we taken under consideration in this project was unexpected reverse motion an automobile in gradients and mountain roads.
• This problem may occurdue to driver's carelessness or improper handling of the equipment.
• 'Employees who drive more than 25,000 miles a year have at least a one in 8,000 chance of dying behind the wheel of their company vehicle' (RoSPA, taken from UK Transport Research Laboratory 2008).
• We are eager to provide a simple and economical solution for the above mentioned problem and we had done it as a small prototype for our mini project.
• Ratchet and pawl mechanism is one of the most interesting inventions in the field of mechanical engineering found applications in various sectors.
• Here we make use of this mechanism to arrest the unexpected reverse motion of a vehicle by fabricating it with the wheel rim and attaching the pawl to the frame. The engagement and disengagement of the pawl can be done with the help of an electromagnetic switch or a lever mechanism.