Before starting the mixer, start the engine. At this time, the transmission should be in the neutral position, and the connection between the engine and the driving wheel should be disconnected to remove the engine load. After the engine has been started and the normal idle running has started, 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, the mixer will suddenly drive forward once the transmission is put into gear, and the engine will be shut down. This is because when the car moves from static to forward, it produces a great inertia force, which causes a great resistance moment to the engine. Under the action of this inertia resistance moment, the engine speed drops sharply below the lowest stable speed (generally 300-500r / min) in an instant, and the engine will shut down and not work, of course, the mixer will not start.
After the clutch is installed in the transmission system, after the engine is started and before the mixer is started, the driver first depresses the clutch pedal, disengages the clutch, disengages the engine from the transmission system, puts the transmission into gear, and then gradually releases the clutch pedal to gradually engage the clutch. In the process of gradual engagement of the clutch, the blocked torque of the engine 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 kept above the minimum stable speed, without stalling. Due to the increase of clutch engagement, the torque transmitted by the engine to the driving wheel through the transmission system will gradually increase. When the traction force is enough to overcome the starting resistance, the mixer starts to move from static and accelerates gradually. Therefore, the concrete tank truck can start smoothly.