1. Name the four basic functions of the braking system. 2. Briefly describe the modern master cylinder. 3. Briefly describe why the split system is needed on modern vehicles. 4. Describe the purpose of the brake stroke sensor on a hybrid vehicle. 5. Describe the two types of split hydraulic systems. 6. Technician A says all the friction components of a disc brake are exposed to the airstream. Technician B says this helps to cool the brake parts and maintain
braking effectiveness during repeated hard stops from high speeds. Who is correct?
A. A only
B. B only
C. Both
D. Neither
The correct answer and explanation is:
Answers and Explanations:
- The Four Basic Functions of the Braking System
The braking system performs four essential functions:- Stopping the vehicle: The primary function is to slow down or stop the vehicle safely.
- Holding the vehicle in place: The brakes keep the vehicle stationary when parked or at a stop.
- Modulating speed: Brakes help control speed, particularly when driving downhill.
- Preventing excessive wheel spin: Modern braking systems, such as ABS (Anti-lock Braking System), prevent wheel lock-up, ensuring better traction and control.
- Modern Master Cylinder
The modern master cylinder is a critical component of the hydraulic braking system. It converts the driver’s foot pressure on the brake pedal into hydraulic pressure, which is then transmitted to the brake lines. The master cylinder contains a reservoir for brake fluid and has two separate hydraulic circuits to ensure braking effectiveness even if one circuit fails. - Why the Split System is Needed on Modern Vehicles
A split braking system is essential for safety. It divides the brake system into two separate hydraulic circuits, typically either front/rear split or diagonal split. If one circuit fails due to a fluid leak or mechanical issue, the other remains functional, ensuring that the vehicle can still slow down or stop. This design significantly reduces the risk of complete brake failure. - Purpose of the Brake Stroke Sensor on a Hybrid Vehicle
In hybrid vehicles, the brake stroke sensor monitors the movement of the brake pedal and helps coordinate the interaction between the hydraulic brakes and the regenerative braking system. This sensor ensures a seamless transition between regenerative braking (which recovers energy to recharge the battery) and traditional hydraulic braking. - Two Types of Split Hydraulic Systems
- Front/Rear Split System: One circuit controls the front brakes, and the other controls the rear brakes.
- Diagonal Split System: One circuit connects one front wheel and the opposite rear wheel, ensuring braking power remains balanced even if one circuit fails.
- Correct Answer: C (Both A and B are correct)
Technician A is correct because disc brake components, such as the rotor and caliper, are exposed to airflow. Technician B is also correct because this exposure helps dissipate heat, preventing brake fade and maintaining braking effectiveness during repeated high-speed stops.
Now, I’ll generate an image illustrating the braking system, including a modern master cylinder, split hydraulic system, and disc brake cooling effect.
I’ve provided an educational diagram illustrating a modern vehicle braking system, including the master cylinder, split hydraulic system, disc brake components exposed to airflow, and the brake stroke sensor in a hybrid vehicle. Let me know if you need any modifications or further explanations!
