Before starting the mixer, start the engine first. At this time, the transmission should be in neutral position, and the connection between the engine and the driving wheel should be disconnected to remove the engine load. After the engine has started and started normal idle running, the transmission can be put into a certain gear to start the mixer.
When the mixer starts, it accelerates gradually from a completely static state. If the transmission system (which connects the whole mixer) is rigidly connected with the engine, as soon as the transmission is put into gear, the mixer will suddenly impulse forward, and the engine will shut down.
This is because the car from static to forward, produce a lot of inertial force, cause a lot of resistance moment to the engine. Under the action of this moment of inertia resistance, the engine speed drops sharply to the lowest stable speed (generally 300-500 R / min) in an instant, and the engine stops and can't work. Of course, the mixer can't start.
After the clutch is installed in the transmission system, after the engine is started and before the mixer is started, the driver first steps on the clutch pedal to separate the clutch, so as to separate the engine from the transmission system, then put the transmission into gear, and then gradually release the clutch pedal to gradually engage the clutch.
In the process of clutch engagement, the engine torque is also gradually increased, so the accelerator pedal should be gradually depressed at the same time, that is, the fuel supply to the engine should be gradually increased, so that the engine speed will always be maintained above the minimum stable speed, and the engine will not be flameout.
As the clutch engagement degree increases gradually, the torque transmitted by the engine to the driving wheels through the transmission system increases gradually. When the traction is enough to meet the starting resistance, the mixer starts to move from static and accelerates gradually. Therefore, the concrete tank car can start smoothly.