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How to brake the engine (How does the engine brake?DigiPlus) The engine not only has the ability to accelerate and drive the vehicle, but also realizes braking. This process is often called engine braking. Engine braking is an effective braking method, but it also has its own specific applicable conditions. This article will discuss how the engine achieves braking, as well as its applicable conditions and several common forms. How is the engine brake realized? The implementation of engine brakes is usually achieved by compressing gas to block the engine. When the engine is working, there is a combustion mixture in the cylinder, and the combustion gas is discharged through the exhaust valve to reduce the pressure in the cylinder. When the engine brakes, the exhaust valve closes., the gas in the cylinder is compressed, which will form a reaction force, causing the engine to generate braking force, thus realizing the braking process. In addition to braking by compressing gas, the engine can also brake by reducing the throttle opening, which is called deceleration braking. In deceleration braking, the fuel supply of the engine is reduced to reduce the speed of the vehicle. This braking method is usually used in processes that need to control the speed of the vehicle, such as slopes, curves, etc. In addition, the engine can also brake by turning off the ignition system. In this case, after the ignition system is turned off, the engine cannot continue to burn the mixture, and the speed of the engine will decrease, thus generating brating force. Applicable conditions for engine braking Although engine braking is an effective braking method, it is not always applicable.Normal braking and engine braking have different advantages and disadvantages, so it is a decision that needs to be weighed and balanced to choose how to brake under certain circumstances. Engine brakes are usually used for long braking processes, such as long downhills, vehicles falling to low speeds and requiring a customized power. In this case, the brake may overheat, and the engine brake can achieve continuous braking more safely. In addition, engine brakes are also suitable for emergency parking in the acceleration area. For example, in the case of Liu Qiang, who is famous as a space pilot, engine brakes are also used for emergency parking. However, special attention should be paid to the fact that engine brakes should not be used at high speeds. At high speeds, the engine will be very hot, and the use of brakes will also bring too much heat, causing the engine to fail. Common engine brake forms 1. Slow-lift clutch and slow clutch exchange can enable the vehicle to achieve slow braking.Two. Change the position of the accelerator pedal, slowly release the accelerator during the deceleration process, and try to avoid stepping on the brake pedal. 3. Reduce the opening of the throttle. When it is on slate or a long downhill, the throttle can be half open to achieve the appropriate deceleration effect. Four. Turn off the ignition system. During the braking process of the car, you can turn off the ignition switch so that the car can maintain its inertia to achieve the braking effect. To sum up, engine braking is an effective braking method. The braking methods of the engine include compressed gas, deceleration braking and closing the ignition system. However, before using the engine brake, it is necessary to ensure the applicable conditions of the brake and carefully choose how to brake. We need to understand these methods carefully and choose the most suitable method for our driving experience.

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