1. General
Based on signals from the speed sensors, the Skid Control ECU senses the rotational speed of the wheels as well as the vehicle speed. During braking, although the rotational speed of the Read more What is Skid Control ECU?
Control Idea of ABS (Anti-lock Brake System)
To prevent the tires from locking and the loosing the ability to turn the steering wheel during emergency braking, it is effective to repeatedly depress and release the brake. There is no time to do this, Read more Control Idea of ABS (Anti-lock Brake System)
Types of Parking Brake Body
There are several types, depending on the type of rear brakes.
1. Foot brake sharing type
(1) Drum brake type
This type uses the drum brake body to hold the tire. The rear wheel foot brake is Read more Types of Parking Brake Body
Parking Brake Types of Parking Brake Lever
1. Lever type
Mainly used in passenger and commercial
vehicles.
2. Stick type
Used in some commercial vehicles.
3. Pedal type
Used in some passenger and highgrade vehicles. Nowadays the Read more Parking Brake Types of Parking Brake Lever
Propeller Shaft Vibration and Sounds
Imbalance
Imbalance in the propeller shaft causes vibration or noise, like in tires. The propeller shaft turns faster than tires by the gear ratio of the differential gear. Therefore, the frequency of Read more Propeller Shaft Vibration and Sounds
Tire Uniformity Vibration and Sounds
Tire uniformity refers to uniformity of weight, dimensions and rigidity.
However, since uniformity of weight is ordinarily called “wheel balance” and uniformity of dimensions is called “run-out” uniformity Read more Tire Uniformity Vibration and Sounds
Run-out Vibration and Sounds
Since a tire is made by bonding together rubber, there is a in difference in the rubber thickness, the circumference of the tire is not a perfect circle.
Even if the tire is perfectly circular, if the Read more Run-out Vibration and Sounds
Wheel Balance Vibration and Sounds
Due to the weight unbalance of the rotating object, a centrifugal force is generated during rotation, which results in a vibrating force.
This vibrating force increases in proportion to the square of Read more Wheel Balance Vibration and Sounds
Tires Vibration and Sounds
The vibrating force caused by tires can be classified into two cases; the tire itself generates the vibrating force and uneveness on the paved road cause a vibrating force.
Tire itself generates vibrating Read more Tires Vibration and Sounds
Automotive Fan Noise
Fan noise produced by the cooling fans for the radiator, alternator, and others, become louder in proportion to their rpm.
The fan noise can be produced by fan blades cutting through the air, or by air Read more Automotive Fan Noise