The gearbox is a very important part of a Petrol Car. It can change the transmission ratio and expand the torque and speed of the driving wheels. With the development of modern technology, Petrol Car gearboxes have also been upgraded. From the original manual gearbox to the current continuously variable gearbox, from no synchronizer to with synchronizer, the control is becoming more and more convenient. At present, diesel engines are widely used in engineering machinery. Their torque and speed ranges are small and cannot meet the requirements of Roewe Car for traction and driving speed under various working conditions. A gearbox is needed to solve this contradiction. The performance of Petrol Car gearbox is the key to measuring the power, economy and drivability of engineering machinery. The current transmission systems mainly include: mechanical transmission, hydraulic transmission, and hydrostatic transmission. Petrol Car transmissions include manual shifting and power shifting, and the structures include fixed-axis and planetary types.
Among them, the hydraulic torque converter is the most characteristic component of AT. It is composed of components such as a pump impeller, a turbine, and a guide wheel. It directly inputs engine power to transmit torque and clutch action. The pump impeller and the turbine are a pair of working combinations. They are like two fans placed opposite each other. The wind blown by one active fan will drive the blades of the other passive fan to rotate. The flowing air-wind becomes the medium for transferring kinetic energy. .
If liquid is used instead of air as the medium for transmitting kinetic energy, the pump impeller will drive the turbine to rotate through the liquid, and a guide wheel is added between the pump impeller and the turbine to improve the transmission efficiency of the liquid. Because the hydraulic torque converter's automatic transmission torque range is not large enough and the efficiency is low.