How does the Mercedes Benz Gearbox Drum work

The gearbox drum is also called a hydraulic torque converter, which transmits engine power and reduces the impact of shifting, which is equivalent to the semi-linkage state of the manual transmission clutch, and locks it after the speed comes up. The power is transmitted directly to the gears.

The torque converter is the component in the automatic transmission that transmits the power from the engine flywheel, replacing the clutch on the traditional manual transmission. Fluid torque converter is a hydraulic element composed of a pump wheel, a turbine, and a guide wheel. Installed between the engine and the transmission, the hydraulic oil (ATF) is used as the working medium to transmit torque, torque conversion, speed transmission and clutch.

Hydraulic torque converter is a non-rigid torque converter with liquid as the working medium, which is one of the forms of hydraulic transmission. It has a closed working chamber in which the liquid circulates and flows, in which the pump wheel, turbine and guide wheel are connected to the input shaft, output shaft and housing respectively. When the power engine (internal combustion engine, electric motor, etc.) drives the input shaft to rotate, the liquid flows out of the centrifugal pump in turn, passes through the turbine, the guide wheel and then returns to the pump wheel, and circulates repeatedly.

The pump wheel transfers the mechanical energy from the input shaft to the liquid. The high-speed liquid pushes the turbine to rotate, transferring energy to the output shaft. Torque converters transmit torque by the interaction of the liquid with the blades to produce a change in momentum moment.

The working principle of the brake drum is the principle of inhaling air when the engine is working, causing a vacuum on one side of the booster, and the pressure difference relative to the normal air pressure on the other side, using this pressure difference to strengthen the braking thrust.

When driving in water, the wheels are almost all immersed in the water, making the brake pads.

A layer of water is left between the brake drum and the brake drum, as if lubricating oil is applied, so that the friction between the brake pads and the brake drum is made.

Reduced, the car cannot be controlled, and the water in the drum is not easy to escape.

This phenomenon of brake failure comes very quickly, after walking away from the water while stepping on the brakes, several times in a row, the water droplets between the brake pads and the brake drum will be wiped off, at the same time, the heat generated by the friction will dry it, so that the brakes will quickly return to the original sensitivity.

Automotive drums, also known as vacuum boosters, work by using vacuum (negative pressure) to increase the force exerted by the driver on the pedals.

The vacuum booster is generally located between the brake pedal and the brake master cylinder, and for ease of installation, it is usually combined with the master cylinder as a single component, and a portion of the master cylinder is deep into the vacuum booster housing.

What you said is not wrong is that the vacuum booster uses the principle of inhaling air when the engine is working, causing a vacuum on one side of the booster, and the pressure difference relative to the normal air pressure on the other side, and using this pressure difference to strengthen the braking thrust.

The drum is linked to the flywheel, and the vacuum pump is the auxiliary brake.

Fault performance: there is no gear in the car, no oil pressure, etc. In this case, the oil pump drive lugs on the torque converter are broken.

Check the fault: If the car does not have all the gears while driving, check that the oil level is normal, and the measurement of oil pressure is also normal, it may be a problem with the torque converter at this time. Check to see if the turbine spline in the torque converter is worn or whether the turbine is disconnected from the turbine shaft.

During transmission repair, if a large amount of metal particles are found in the oil pan and inside the transmission, and no wear parts can be found, it may be a fault of the torque converter. In addition, if the maintenance master installs the gearbox, the installation is not good, and there will be problems.

The car doesn't have the power or doesn't go at all.

Mercedes-Benz ML350 transmission vigorously drums that you can't do it, so you go to a 4S shop, or go to a professional auto repair shop to replace it.

You can find a small hammer with a 20 leaderboard and slowly knock it down, and it should work.

Is there a rush level at the start, whether there is a punch or not, it has to be repaired, and there is a need to see if the oil channel is blocked, and there is no problem with the strong drum.

Follow-up question: There is no rush How to see the oil channel blockage valve body wrench and electromagnetic valence By the way, can the 431 read the data stream.