What 3 Checks should be made before conducting a road test for a brake problem?
(1) Vehicle speed. (2) Brake pedal force. (3) Angular velocity of each wheel. (4) Brake torque at each wheel.
What are the basic requirements of brake system?
i) The brakes must be strong enough to stop the vehicle within a minimum distance in an emergency. But this should also be consistent with safety. ii)The brakes must have good antifade characteristics i.e, their effectiveness should not decrease with constant prolonged application e.g. while descending hills.
What does riding the brake mean?
Any driving school instructor worth his or her clipboard will tell you that riding the brake – putting your foot on the brake pedal however lightly when you have no intention of slowing down or stopping – is a terrible driving habit.
What is squeeze braking?
To squeeze brake, keep your heel on the floor and use your toes to apply pressure on the brake pedal. If the wheels lock, ease off the brake pedal to a point just before they lock. Adjust pedal pressure as necessary. This gives you the best combination of braking effort and directional control.
What are static and rolling brake tests?
A static brake check tests features which the moving/rolling brake check doesn’t. Pump the footbrake pedal a few times until it becomes firm (this removes the vacuum in the brake servo unit) and maintain the footbrake pressure. The pedal will become progressively harder to press – this is normal.
How do you measure brake performance?
Calculate the vehicle’s weight. The weight of the vehicle can be found in the vehicle’s manual. Divide the vehicle’s weight by the total brake effort, and then multiply the number by 100 to get the brake efficiency percentage. Weigh everything inside your car as well, because that will affect the brakes.
What does check brake system mean?
It means that the car’s computer has detected a problem with the Brake system and needs to be inspected, if you see one that reads “CHECK BRAKE SYSTEM”. If the message doesn’t clear, you should have your car inspected as soon as possible.
What is brake balance?
Definition & Description. Brake bias is the percentage of total braking force applied to the front wheels. It can also be called “brake balance.” This means the front brakes provide 60-70% of the total braking force.
What is the principle of braking?
The principle used by every brake is friction. Opposing any force is something friction does but we increase it using brakes. Friction converts kinetic energy into heat energy thus effectively bringing the car to a stop. Every time of brake will use friction to stop the car, one way or another.
Why braking is required?
Electrical Braking is usually employed in applications to stop a unit driven by motors in an exact position or to have the speed of the driven unit suitably controlled during its deceleration. Electrical braking is used in applications where frequent, quick, accurate or emergency stops are required.
How do you do a parking brake test?
TEST 1:Parking brake test. Start the bus and let the air pressure build to at least 90 psi. Step on the brake pedal and put the bus into gear. Slowly take your foot off the brake and gently press the accelerator. The bus should not move. TEST 2:Applied pressure test.
Do you do the 7 step air brake test in order?
Always do the 7 step air brake test in order. Initially, it is difficult to memorize the 7 steps air brake test, but the word “LAGASS” makes it easier to remember the steps in the 7 step air brake test. The abbribation ofpsi “LAGGASS” is
What do you need to know about service brake test?
The service brake test is a test of a vehicle’s stopping ability. Your brake paddle is a service brake. Check the brake peddle for rust, debris and the cleanness of the area. The debris under the brake paddle, loose objects on the floor can create dangerous situations.
How is the performance of a braking system determined?
The performance prescribed for braking systems is based on the stopping distance and the mean fully developed deceleration. The performance of a braking system shall be determined by measuring the stopping distance in relation to the initial speed of the vehicle and by measuring the mean fully developed deceleration during the test.