Chassis dynamometer, vehicle test bench, and method for simulating actual road driving of vehicle

A chassis dynamometer for testing a vehicle, the chassis dynamometer comprising:

• a front wheel test assembly;
• a rear wheel test assembly which is spaced apart from the front wheel test assembly by a distance along a first direction and is configured to be able to adjust the distance between the rear wheel test assembly and the front wheel test assembly to adapt to different vehicle wheelbases;
• a control device electrically connected to the front wheel test assembly) and the rear wheel test assembly to adjust the position and rotation speed of the front wheel test assembly and the rear wheel test assembly, and configured to synchronize the rotation speed of the front wheel test assembly and the rear wheel test assembly;
• where the front wheel testing assembly comprises:
• a front base frame fixed to the ground;
• two universal slides) slidably arranged on the front base frame along a second direction that are configured to be rotatable around a vertical direction, wherein the second direction is perpendicular to the first direction and the vertical direction;
• a front wheel hub bracket rotatably arranged on the universal slide and
• a slewing power-assist driving device is fixed on the front wheel hub bracket and is configured to drive the front wheel hub bracket to rotate around a vertical direction to cooperate with the steering of the front wheels of the vehicle.