In-wheel motor drives Chery to explore a new era of electric vehicles

At the just concluded 2011 Shanghai International Auto Show, the electric car Riich X1-EV equipped with Chery New Energy's latest wheel hub motor technology made a shining debut, once again focusing the industry's attention on the direction of the electrification development of new energy vehicles. So far, the electric drive technology of wheel hub motors has also entered the field of vision of ordinary consumers as a powerful driving force for the development of electric vehicles.

The car is not small, the space miracle brought by the hub motor technology

Anyone who has seen the Riich X1-EV will be left with a deep impression: "The small car is not small". The exquisite appearance and spacious space make this "urban mini SUV" tailored for urban elites deeply rooted in the hearts of the people with its large carrying space. The reason for this is that the wheel hub motor drive technology is really a great contribution. Compared with traditional cars and centralized motor drive cars, the Riich X1-EV equipped with a wheel hub motor drive system directly installs the drive motor in the wheel, without the need for a traditional engine room. This method saves a lot of space in the front cabin of the car, while greatly simplifying the chassis structure and making the suspension system better designed, greatly increasing the designer's freedom in the overall layout and body design of the vehicle, and ensuring the design concept of the Riich X1-EV urban SUV to the greatest extent, and reserving a large and comfortable riding space.

Energy saving and efficiency improvement, electric cars can actually run farther

At the same time, energy saving is another magic weapon that wheel hub motor drives to promote the development of new energy vehicles. In traditional cars, the torque generated by the engine needs to drive the wheels forward through mechanical devices such as gears and drive shafts. In this process, part of the energy will be lost by mechanical movement. The Riich X1-EV equipped with a wheel hub motor greatly simplifies the mechanical transmission mechanism and eliminates the transmission device. The electric energy generated by the wheel hub motor can be directly transmitted to the electric motor installed in the wheel, reducing the energy loss and mechanical wear in the mechanical transmission process, and greatly improving the efficiency of the motor drive. According to the staff, when driving the Riich X1-EV, the braking mode for power generation can be adjusted when necessary. The ESP and ABS functions can be realized without other systems. When driving the same mileage, it can save about 30% of the battery power.

Smart handling, "urban mini SUV" is comparable to traditional classics

In the display of Riich X1-EV, flexible steering and superior handling performance have become another feature that many consumers talk about. It is reported that due to the installation of independent motors on the wheels, the four wheels of Riich X1-EV can flexibly distribute power. On the basis of individual control of each wheel, large-angle turns and even turns of plus or minus 90 degrees have become possible. The originally difficult operations such as turning on the spot and vertical storage, and even stunts such as sharp turns and drifting at high speeds, have become possible with Riich X1-EV. At the same time, with the help of the torque obtained instantly by the wheel hub motor, the vehicle can be started quickly. When the vehicle is stuck in deep snow, the driver can easily get out of trouble by applying traction to the tires with road adhesion.

The industry has long been discussing the development direction of electric vehicle technology. Not long ago, He Zuoxiu, an academician of the Chinese Academy of Sciences, a particle physicist and theoretical physicist, publicly stated that "pure electric vehicles with hub motors are very promising." At present, electric vehicles are constrained by traditional car design ideas, and their structures are mostly modified on the basis of traditional cars. However, Chery New Energy has taken a different approach and fully explored the various technical advantages of motor drive applications. Hub motors are another breakthrough for Chery New Energy. The application of hub motors in electric vehicles can not only improve the efficiency of motor drive, but also greatly simplify the mechanical transmission mechanism, reduce the weight of the vehicle, and reduce its transmission and additional losses. Compared with the original electric drive system technology, this technology has great advantages in reducing costs, saving energy and reducing noise, and comprehensively improving energy-saving and environmental protection performance. In terms of various indicators and cost-effectiveness, it has a strong driving force for electric vehicles to achieve popular commercialization requirements.