What are Engine Braking and Service Braking?

1 Answers
LeAurora
07/30/25 6:09am
Engine braking involves flexibly using the parking brake to minimize the use of foot braking. Below are the functions and principles of engine braking: Functions of Engine Braking: Engine braking refers to lifting the throttle pedal without depressing the clutch, utilizing the compression resistance generated by the engine's compression stroke, internal friction, and intake/exhaust resistance to create a braking effect on the drive wheels. Principles of Engine Braking: Engine braking means keeping the vehicle in gear without applying the throttle, so the engine does not provide traction. Instead, the rotation of the wheels drives the transmission system, and the idling engine generates a counteracting resistance on the vehicle. Higher gears result in less engine resistance, while lower gears produce more. This differs from clutch braking, brake braking, and parking braking.
Was this review help?
2
2
Share
More Forum Discussions

What is the engine model of the Audi A6L 2.5L?

Audi A6L 2.5L is equipped with a 2.5-liter V6 FSI direct fuel injection engine. The Audi A6L offers a specially developed 2.5-liter V6 FSI direct fuel injection engine for the Chinese market. This engine belongs to the same series as the 2.8 FSI and 3.0 TFSI, representing Audi's latest engine products. It incorporates advanced technologies such as Audi's Variable Valve Lift System (AVS) and FSI direct fuel injection system, comprehensively replacing the previous generation's 2.4-liter engine in the Audi A6L. Engine: An engine is a machine that converts other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. The term engine can refer to both the power-generating device and the entire machine including the power unit. The original meaning of engine refers to a "mechanical device that generates power." External Combustion Engine: Its fuel is burned outside the engine, invented in 1816 by R. Stirling of Scotland, hence also known as the Stirling engine. The engine converts the thermal energy generated by this combustion into kinetic energy. Watt's improved steam engine is a typical example of an external combustion engine. When a large amount of coal is burned to heat water into a large amount of steam, high pressure is generated, which then drives mechanical work, completing the transformation of thermal energy into kinetic energy.
19
3
Share

Which manufacturer produces the engine for the Trumpchi GS4?

Trumpchi GS4's engine is independently developed and produced by Trumpchi. The Trumpchi GS4 is a compact SUV under the Trumpchi brand. In terms of body dimensions, this vehicle measures 4545 mm in length, 1856 mm in width, and 1668 mm in height, with a wheelbase of 2680 mm. Regarding powertrain, the Trumpchi GS4 is equipped with a 1.5-liter turbocharged engine. This engine delivers a maximum power output of 124 kW, achieving peak power at 5000 rpm and maximum torque between 1700 to 4000 rpm. The engine incorporates DCVVT technology and direct fuel injection, utilizing an aluminum alloy cylinder head and a cast iron cylinder block.
6
1
Share

How to Brake a Motorcycle Correctly?

Motorcycle braking methods: 1. When riding at high speed, the braking force on the front wheel must be greater than that on the rear wheel, and the front wheel braking force should not cause the front wheel to lock up; 2. When braking uphill, the front wheel braking force can be appropriately increased; 3. When braking downhill, the rear wheel braking force can be appropriately increased; 4. During emergency braking, the braking force should be slightly less than the force that would cause the wheels to lock up; 5. On slippery roads, the rear wheel should be braked before the front wheel. Always use both brakes simultaneously because the front brake is designed primarily to assist the rear brake in achieving effective stopping. Using only the front or rear brake alone will not achieve the shortest braking distance; combining both provides the best braking effect.
9
0
Share

What Causes Car Transmission Noise?

Car transmission noise can be caused by: 1. Worn or damaged bearings; 2. Loose transmission housing bolts; 3. Excessive clearance between the gearshift lever and shift fork groove in the transmission; 4. Long overdue transmission fluid change; 5. Use of inferior automatic transmission fluid; 6. Gear meshing clearance issues; 7. Gear tooth surface metal peeling, tooth breakage, or misalignment during assembly; 8. Water ingress into the transmission without timely repair. The transmission is a mechanism used to alter the speed and torque from the engine, capable of fixed or stepped changes in the transmission ratio between the output and input shafts. It is categorized into stepped transmissions, continuously variable transmissions, and integrated transmissions.
3
0
Share

What is the length of the Rolls-Royce Phantom standard wheelbase version?

The Rolls-Royce Phantom standard wheelbase version has a length of 3552 millimeters, with dimensions of 5770 millimeters in length, 2018 millimeters in width, and 1648 millimeters in height. The long wheelbase version has a wheelbase of 3772 millimeters, with dimensions of 5990 millimeters in length, 2018 millimeters in width, and 1656 millimeters in height. The Rolls-Royce Phantom is a large luxury sedan, equipped with a 6.7-liter V12 twin-turbocharged engine across the entire lineup. This engine delivers 571 horsepower and a maximum torque of 900 Newton-meters, reaching its peak power output at 5000 revolutions per minute. The engine features direct fuel injection technology and utilizes an aluminum alloy cylinder head and block.
17
3
Share

What is the small button inside the Audi R8 storage compartment for?

A small button inside the Audi R8 storage compartment is the P button, the parking button. Introduction to the P button: The P button can be pulled up or pressed down. It is similar to a traditional handbrake lever: pulling engages the brake, while pressing releases it. After pulling the P button, a red (P) indicator will appear on the dashboard, equivalent to the original handbrake braking. This P function must be manually activated. To release it manually, you need to press the brake pedal and push the P button downward. The P button can also be released by applying throttle: when the handbrake is engaged, if the car is in a driving gear (D, R, S), all doors are closed, and the seatbelt is fastened, applying throttle will automatically release the P function. Introduction to the A button (Auto Hold): The Auto Hold switch. The A button can only be pressed downward. It is a stateful button, similar to the AC (air conditioning) switch. Pressing it once turns on Auto Hold, indicated by the A button's light, and pressing it again turns it off. When Auto Hold is enabled, the car will automatically stop after braking to a complete halt in any gear, displaying a green (P) indicator on the dashboard. At this point, releasing the brake pedal will not cause the car to move. If you don't need to wait for a long time, there's no need to shift to neutral. If the car is in a driving gear (D, R, S), pressing the throttle will allow it to move. The purpose of Auto Hold is to eliminate the need for any manual actions from stopping to starting. It is a very useful feature during traffic lights or congestion. Therefore, the A button is not one that needs to be pressed frequently, nor should it be pressed after the car has come to a complete stop.
17
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.