The central valve double chamber master cylinder is not a double rod brake master cylinder

1. Detonation, commonly known as knocking cylinder and calling rod. Detonation is an abnormal combustion phenomenon that occurs during the combustion of an engine. To put it simply, "knocking" is a phenomenon of abnormal combustion of the engine.

Detonation is an abnormal pressure in the combustion chamber caused by abnormal combustion. When the engine knocks, it makes a knocking sound. The slight discontinuous knocking sound is quite crisp, somewhat similar to the sound of tapping a triangle.

In the event of severe and continuous detonation, the engine will have a "mile-mile" sound, and the engine will also be obviously weak at this time.

1. There is an irregular metal knocking sound of "clang", "click" and "dangdang" in the engine.

2. Engine tremor.

3. The engine temperature is too high.

4. The fuel combustion is incomplete, and there is black smoke in the exhaust gas.

5. The engine power decreases.

6. Increased fuel consumption.

7. During normal driving, the speed suddenly changes inexplicably.

Second, the main reasons.

1. The ignition angle is too advanced: in order to make the piston get power immediately after entering the power stroke after the end of compression top dead center, it is usually ignited in advance before the piston reaches the top dead center (because it takes a while from ignition to complete combustion). Ignition too early will cause most of the oil and gas to burn when the piston is still compressing the stroke, and the unburned oil and gas will be subjected to great pressure and spontaneous combustion, resulting in detonation.

2. Excessive carbon deposition in the engine

Excessive carbon deposition in the combustion chamber of the engine will not only increase the compression ratio (high pressure), but also produce high temperature hot spots on the surface of the carbon deposit, causing the engine to knock.

3. The engine temperature is too high.

If the engine is too hot, the inlet temperature is too high, or the engine cooling water is poorly circulated, which will cause the engine to detonate due to high temperature.

4. The air-fuel ratio is incorrect

Too thin the fuel-air mixing ratio will increase the combustion temperature, and the increase in combustion temperature will cause the engine temperature to rise, of course, it is easy to knock.

5. The octane number of fuel is too low

The octane number is an indicator of the knock resistance of the fuel, and the higher the octane number, the stronger the knock resistance. Engines with high compression ratios have higher pressure in the combustion chamber, and are prone to knocking if fuel with low knock resistance is used.

3. Inspection and maintenance.

1. Detect the change of engine combustion chamber pressure; Detect the vibration frequency of the engine block; Detection of combustion noise of gas mixtures.

2. The measurement accuracy of directly detecting the pressure change of the combustion chamber to detect the vibration of the engine is high, but the sensor is difficult to install, and the durability is poor, so it is generally used for measuring instruments, and the pressure detection sensors in practical applications are indirect detection type.

3. The fastest and most effective way to suppress detonation is to delay the ignition advance angle and reduce the combustion pressure. Therefore, the working principle of the knock sensor is that when the engine knocking is detected, the ignition advance angle will be delayed to the ignition time when the detonation will not be detonated, and then the ignition will be slowly restored in advance when the engine does not detonation.

Most of them are equipped with a single piston inside.

The brake master cylinder, also known as the hydraulic brake master cylinder, is the power source of the service brake system. The braking force comes from the pedal force exerted by the driver on the brake pedal wheel plate and the vacuum degree of the engine intake manifold (vacuum assist), where the vacuum degree is the main power source of the master cylinder. The main function of the master cylinder is to convert the mechanical force exerted on the brake pedal and the force of the vacuum booster by the driver into brake oil pressure, and send the brake fluid with a certain pressure to the maker rock balance wheel cylinder (sub-cylinder) of each wheel through the brake pipeline, and then transform the wheel brake into the wheel braking force.

The figure below shows a double-shaft hydraulic cylinder, which means that the hydraulic cylinder rises or falls (or moves forward and backward) by the hydraulic oil pushing the piston.

That is, the rise and fall of the piston in the hydraulic cylinder are pressed with hydraulic oil.

Double-shaft hydraulic cylinder means that the connecting end of the hydraulic cylinder adopts shaft extension type; Double-acting cylinders are hydraulic cylinders that can be fed pressure oil from both sides of the piston. It is often used as a driving component for jacks. The actuator of the double-acting hydraulic cylinder is the main output device of the hydraulic motion system, and although it varies in size, type and design, it is usually the most observable part.

These actuators convert the pressure of the liquid into a fast, controllable linear motion or force that drives the load.

Single-acting hydraulic cylinder refers to the movement of one direction with oil pressure, and the return depends on external forces such as self-weight or spring, and only one end of the two cavities of this cylinder has oil, and the other end is in contact with air. Double-acting hydraulic cylinder means that there is oil in both chambers, and the action in both directions must be realized by oil pressure.

Double-chamber brake master cylinder is an element used in automobile braking system, which is mainly composed of the following parts:

1.Main body: The main body of the brake master cylinder is a metal cylinder, usually made of cast iron or aluminum alloy. It is a storage and delivery vessel for brake fluid.

2.Pistons: There are one or more pistons inside the brake master cylinder, usually a metal cylinder sealed with a rubber seal. The movement of the piston is controlled by the brake pedal, and when the pedal is pressed, the piston moves forward.

3.Throttle valve: In a double-chamber brake master cylinder, there is a throttle valve to separate the fluid inside the master cylinder. It divides the master cylinder into two separate chambers, connected to the front and rear braking systems.

4.Seals: The pistons inside the brake master cylinder are usually sealed by rubber seals to ensure that the fluid does not leak. These sealing rings are able to withstand high pressures and temperatures to keep the braking system up and running.

5.Connecting lines: The brake master cylinder connects the front and rear braking systems with the two chambers of the master cylinder through the connecting lines to transmit braking force. Connecting tubing is usually made of metal and has sufficient strength and corrosion resistance.

Through the cooperation of the above components, the dual-chamber brake master cylinder can realize the function of independent braking of the front and rear wheels, thereby improving the safety and reliability of the braking system. When the pedal is pressed, the fluid in the brake master cylinder is pushed into the front and rear braking systems, creating a braking force that slows or stops the vehicle.