The disclosure provides a vehicle excitation advice. The vehicle excitation device that excites a vehicle having a plurality of wheels includes a plurality of excitation machine bodies on which the wheels are placed, respectively. The excitation machine body includes a front shaft and a rear shaft on which the wheels are placed at intervals in the in the front-rear direction of the vehicle, and an actuator (hydraulic actuator) that excites vibration to the wheels by moving at least one of the front shaft and the rear shaft in the front-rear direction. The front shaft is inclined such that the inner end portion of the front shaft in the left-right direction of the vehicle is located closer to the front of the vehicle than the outer end portion of the front shaft in the left-right direction of the vehicle.

The present disclosure belongs to the technical field of automobile chassis suspension system tests, and provides a loading system and test equipment for an automobile chassis simulation road test. The loading system includes an inclination angle regulation assembly, an automobile weight loading assembly, a rotation angle regulation assembly and a vertical load loading assembly, can simulate to apply various loads which a chassis bears in the real road running process of an automobile, and ensures consistency between a simulation test result and a real automobile test field detection result; and the test equipment further includes a suspension assembly, an acceleration torque assembly and a rotary drum assembly, can simultaneously test the fatigue durability of automobile chassis parts such as a wheel, a suspension and the like, is high in consistency between a test result of the test equipment and a test result of a test field, has universality, can mount wheel and suspension systems of various automobile types and test the fatigue durability of the wheel and suspension systems of various automobile types, shortens the development period of a finished automobile, and reduces the development cost.

The present disclosure belongs to the field of automobile chassis suspension system tests, and provides fatigue test equipment for an automobile chassis simulation road test. The fatigue test equipment can simultaneously test the simulation road test fatigue durability of automobile chassis parts such as the wheel and suspension system and the like, ensures that a test state of the tested wheel and suspension system is close to a real automobile state, and simulates and reproduces a load which an automobile chassis bears in the real road running process in a laboratory.

The present disclosure belongs to the technical field of automobile chassis suspension system tests, and provides a wheel acceleration torque system and test equipment for an automobile chassis simulation road test. The automatic connection and separation mechanism is connected with a transmission shaft of a wheel; the automatic connection and separation mechanism can apply acceleration torque of the torque shaft to the transmission shaft, and can separate the acceleration torque applied to the transmission shaft; and the wheel acceleration torque system and the test equipment can adapt to the requirement for applying the acceleration torque in a test of a test bench, simulate to apply the acceleration torque which the wheel bears in the actual road running process, ensure that a test state of a tested wheel and suspension system is close to a test state of a real automobile test field.

The present disclosure belongs to the technical field of automobile chassis suspension system tests, and provides a loading system and test equipment for an automobile chassis simulation road test. The loading system includes an inclination angle regulation assembly, an automobile weight loading assembly, a rotation angle regulation assembly and a vertical load loading assembly, can simulate to apply various loads which a chassis bears in the real road running process of an automobile, and ensures consistency between a simulation test result and a real automobile test field detection result; and the test equipment further includes a suspension assembly, an acceleration torque assembly and a rotary drum assembly, can simultaneously test the fatigue durability of automobile chassis parts such as a wheel, a suspension and the like, is high in consistency between a test result of the test equipment and a test result of a test field, has universality, can mount wheel and suspension systems of various automobile types and test the fatigue durability of the wheel and suspension systems of various automobile types, shortens the development period of a finished automobile, and reduces the development cost.

The present disclosure belongs to the field of automobile chassis suspension system tests, and provides fatigue test equipment for an automobile chassis simulation road test. The fatigue test equipment can simultaneously test the simulation road test fatigue durability of automobile chassis parts such as the wheel and suspension system and the like, ensures that a test state of the tested wheel and suspension system is close to a real automobile state, and simulates and reproduces a load which an automobile chassis bears in the real road running process in a laboratory.

The present disclosure belongs to the technical field of automobile chassis suspension system tests, and provides a wheel acceleration torque system and test equipment for an automobile chassis simulation road test. The automatic connection and separation mechanism is connected with a transmission shaft of a wheel; the automatic connection and separation mechanism can apply acceleration torque of the torque shaft to the transmission shaft, and can separate the acceleration torque applied to the transmission shaft; and the wheel acceleration torque system and the test equipment can adapt to the requirement for applying the acceleration torque in a test of a test bench, simulate to apply the acceleration torque which the wheel bears in the actual road running process, ensure that a test state of a tested wheel and suspension system is close to a test state of a real automobile test field.

A tire ground contact characteristic measuring method according to the present invention includes: a reproduction step of reproducing a transient change in a tire attitude that occurs during travel of an actual vehicle on a tire; a stress measurement step of causing stress measuring portion embedded on a rotatable rotary drum to measure stress that is applied to the tire in contact with the rotary drum that is rotationally driven; and a calculation step of calculating tire ground contact characteristics, which are characteristics of a ground contact region of a tread surface of the tire in contact with the rotary drum on the basis of the stress measured by the stress measuring portion. The tire ground contact characteristics calculated in the calculation step are tire ground contact characteristics of the tire corresponding to the tire attitude of the actual vehicle at each point in time during a period where the transient change occurs.

The disclosure provides an excitation device capable of suppressing resonance during excitation and reducing the size in a vertical direction. An excitation device (1) includes front and rear mounting plates (5 and 6) having openings (5g and 6g); a base plate (8) arranged below the mounting plates (5 and 6), slope parts (3) to which the mounting plates (5 and 6) and the base plate (8) are fixed; a first roller (17) and a second roller (16) located below the openings (5g and 6g); a hydraulic actuator (12) having a hydraulic cylinder (12a) that excites the second roller (16) in a front-rear direction of a wheel (W); and a bracket (12c) having a lower end fixed to the base plate (8) and an upper end fixed to the mounting plates (5 and 6), and supporting the hydraulic cylinder (12a).

The disclosed embodiments relate to a test stand for the simulation of the vibration behavior of a vehicle. The test stand comprises a receiving element for contacting with a vehicle and an excitation system for the application of excitation frequencies. The excitation system comprises a main actuator system with at least one movable main actuator and an additional actuator system with at least one movable additional actuator, the additional actuator system being connected to the main actuator system.