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What Is A Power Brake Booster And What Does It Do?
The brake booster is a device used to amplify the force applied on the brake pedal when transferring that force to the brake master cylinder. Brake systems that have them are often called “power brakes.”
The brake booster is used on almost all cars with hydraulic brakes — you won’t see them on vehicles that use pressurized air systems as their primary brake circuits.
Here’s how the brake booster is a vital part of your brake system:
Your foot applies around 70lbs of force to the brake pedal when you press it.
That force goes through the brake booster, which amplifies it (often adding 200-300 lb of force) on the master cylinder
The master cylinder then converts that force to hydraulic pressure
The hydraulic brake fluid transmits that pressure through the brake lines
The transmitted hydraulic pressure engages the brake caliper (in a disc brake) or the wheel cylinder (in a drum brake)
The brake pads (on a brake caliper) or brake shoes (on a wheel cylinder) then use this pressure to generate friction and slow the wheels to a stop
What if modern cars didn’t have a booster?
Without a brake booster, we’d have to press down a lot harder than we usually do to get the brake system to engage. Stopping distances would increase, and emergency braking probably wouldn’t be as effective!
What else are brake boosters known as?
Since brake boosters have been around for a while, they have other names like:Power brake booster
ower brakes system
Brake vacuum servo
Brake power booster
Vacuum booster
There are three types of brake boosters.
Each brake booster is typically mounted on the firewall in the engine compartment. You’ll find it attached between the brake pedal and the master cylinder:
1. Vacuum Brake BoosterThe vacuum brake booster is the most commonly used type.
It utilizes the engine vacuum in naturally-aspirated petrol engines to amplify the pressure applied on the brake pedal.
2. Vacuum PumpSome road vehicles use a vacuum pump instead of the engine intake manifold.
These include:Cars with turbo-charged engines
Vehicles with diesel engines
Electric vehicles
Hybrid vehicles
Vacuum pumps can be driven mechanically (from the engine) or via an electric motor (electric brake booster). The vacuum pump is also used in high altitude locations where naturally-aspirated vehicles can’t produce enough vacuum for the brake booster.
3. Hydraulic Brake BoostersThis type of brake booster uses direct hydraulic pressure generated by the power steering pump instead of relying on vacuum pressure.
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This hasn't been the easiest journey but Jerry made it seamless. The first engine did not work for my daughter's car and we had to get a second engine. Jerry was with us every step of the way throughout the warranty process. The second engine worked perfectly, our daughter is in her own car and all is well with the world. I couldn't imagine going through this, 900 miles away from the company, with someone dodging my calls or avoiding me. Jerry stayed in constant contact and answered every question with confidence.
Michigan Auto Parts: Your Partner in Automotive Excellence. I have been a loyal customer of Michigan Auto Parts for years and I can confidently say that they are the best in the business. They offer a huge range of high-quality parts for all makes and models, and their team is always available to provide expert advice and guidance. Whether you're in need of a replacement engine, transmission, or any other part, you'll find that Michigan Auto Parts is always very helpful.
Michigan Auto Parts Provides Outstanding Customer Service. I recently had the pleasure of working with the team at Michigan Auto Parts and was impressed with their level of customer service. They were incredibly helpful in guiding me through the process of finding the right engine for my car, and went above and beyond to ensure that I received the best possible service. The engine itself was in excellent condition and works perfectly. I highly recommend Michigan Auto Parts for anyone in need of outstanding customer service and high-quality parts.
Michigan Auto Parts: The Best Place for Used Engines. I recently purchased a used engine from Michigan Auto Parts and I am extremely satisfied with the product and service I received. The team, including Jerry, Joe, Joey, Kevin, Trevor, Markwood, Ethan, Tina, Nora, Ben, and Danny, was incredibly helpful in guiding me through the process and ensuring that I received the right engine for my car. The engine itself was in great condition and works perfectly. I highly recommend Michigan Auto Parts for anyone in need of reliable used engines.
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Rebecca provided an exceptional customer service experience. Her brilliant performance in customer service provided me a great satisfaction and I must say, Michigan Auto Parts is a great company and they will always deliver. I am confident in their service. I salute Michigan Auto Parts Team.
Good service in finding a 5.9 liter motor and arrange shipping. Received motor and installed. You only get the basic motor components, no power steering pump, no alternator, turbo. So make sure you secure all the components you need to install the motor. 3 year warranty is a nice plus also. I would use your service again. Thanks, Calvin.
Hi my name is Kim myself &my husband ordered parts for both our cars from Michigan Auto Parts & it was like magic ms Nora River & the staff of this company was excellent in finding the parts we needed I would recommend this company as the Michigan Auto Parts for all your needs. Customer service was excellent. Thank you Ms. Nora & Anna & team, you the best👍😇👍
If you're in the market for a car engine, look no further than Michigan Auto Parts. The selection and quality of their engines are top-notch, and their customer service is second to none.
Joe and his crew was effective with letting me know about my part I bought and when will it be delivered. Appreciate their hard work. Check them out if needed
Nora and Austin were extremely helpful in finding exactly what I needed for my car. Nora was very professional and persistent in making sure that I was informed of the process.
Fast, courteous service, wouldn't hesitate to purchase them again Thanks you Kevin
My engine arrived !! Got it installed ! Runs great !!! Joe & Nora got delivered to me here in Fort Worth , Texas. Jim Totten / Norm Reeves Honda