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[YesAuto four-wheel drive detailed] The appearance of Tang gave BYD its first four-wheel drive model. Today we also take this opportunity to test the BYD brand four-wheel drive system. Tang is a plug-in hybrid vehicle equipped with one engine and two electric motors. Judging from the acceleration performance alone, its 4.9 seconds to 100 kilometers acceleration is enough to make some sports cars ashamed. Can its four-wheel drive capability match a hardcore off-road vehicle? Let's go see the test together.

● Model introduction

Tang 2015 2.0T four-wheel drive flagship

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As a medium-sized SUV with a two-ton weight, BYD Tang can be included in the “five-second club”. It can be imagined that its power system is very powerful. It uses what BYD calls the “Three Engines” power combination, which refers to a traditional 2.0T engine and two electric motors located on the front and rear axles. The maximum power of the 2.0T engine is 205Ps (151kW)/5500rpm, and the maximum torque is 320N·m/1750-4500rpm. The two electric motors on the front and rear axles each can output 150Ps and 250N·m of power. The final “three engine” The resultant force can output a maximum power of 503Ps (370kW) and a maximum torque of 820N·m .

BYD Tang is a full-time four-wheel drive, and is equipped with a mechanical limited-slip differential on the rear axle, which is a rare configuration in ordinary urban SUV models. Due to the inherent advantages of this hybrid power system, the rear axle motor independently provides power for the rear two wheels, which eliminates the transmission shaft and other components of the traditional four-wheel drive vehicle. In addition, the four wheels are also equipped with electronic auxiliary braking systems. In short, from the perspective of power and structure, BYD Tang has good four-wheel drive potential. As for the “actual combat”, we continue to look down.

● Power distribution test between shafts

The inter-axle test is to place the two front wheels or two rear wheels of the vehicle on the pulley block respectively to simulate the loss of adhesion of the front or rear axle. Obviously, such a test poses no threat to Tang, who has independent power units for the front and rear axles, and it easily passed the test.

● Cross axis test

The cross axle test uses a pulley block to make the two diagonal wheels lose their adhesion. For BYD Tang, this test tests the transmission capacity between its wheels. Tang used the electronic auxiliary brake and the mechanical limited-slip differential of the rear wheels to limit the slipping wheels, and distributed the power to the other side with adhesion, so it also passed the cross-shaft test.

● Single wheel landing test

The single-round landing test with the highest degree of difficulty did not stop BYD Tang. Whether it is a single front wheel or a single rear wheel landing, it can use enough torque on a limited landing area. Of course, the excellent torque characteristics of the motor itself is also an important reason for its passing the test.

● Summary:

In the above three tests, BYD Tang succeeded in the challenge. As a medium-sized SUV within 300,000 yuan, it is not easy for Tang to achieve such excellent test results. The electric motor with the maximum torque of 250N·m on the front and rear axles, the mechanical limited-slip differential on the rear axle, and the four-wheel electronic auxiliary braking system are all reasons for its excellent escape ability. In addition, the torque control of the electric motor is better optimized than the traditional engine. From the perspective of the whole vehicle, Tang adopts a load-bearing body structure, and the passability parameters such as ground clearance, approach angle, and departure angle are also biased towards the setting of urban SUVs. Through this test, it can be said that such an urban SUV with strong power and excellent four-wheel drive ability to drive on ordinary bad roads will definitely give you sufficient confidence. (Xia Zhimeng, home of the car)