What is the Principle of Automobile Movement?
1 Answers
The torque from the engine is transmitted through the drivetrain to the driving wheels, applying a driving torque that attempts to rotate the wheels. The automobile engine transmits torque to the rear wheels via the drivetrain, generating a force at the contact area between the rear wheels and the ground that propels the car forward, known as traction. When the traction force equals the total resistance of the car's movement, the car moves at a constant speed. If the traction force is greater than the total resistance, the car accelerates; if it is less, the car decelerates. Below is a detailed introduction to the resistances faced by a moving car: 1. Rolling Resistance: Rolling resistance is primarily caused by the deformation between the tires and the ground due to the car's weight. The magnitude of this resistance is directly related to the car's total weight, tire structure and pressure, as well as the quality and grade of the road surface. 2. Air Resistance: Air resistance is formed by the friction between the car's surface and the air during movement, as well as the pressure of the oncoming airflow at the front of the car and the vacuum created by the air vortex at the rear. The magnitude of this resistance is related to the car's aerodynamic design and driving speed, among other factors.
