To obtain vehicle speed deviation data for changeover between accelerator and brake properly with inclination of a standard mode. In technique of calculating a changeover vehicle speed deviation from accelerator to brake in driving vehicle along standard mode (target vehicle speed) of vehicle drive pattern defined by time and vehicle speed within range of predetermined vehicle speed and time deviations from standard mode, an inclination AB of the standard mode is calculated by approximate differentiation of vehicle speed at a judgment standard point A of a current time instant on standard mode, first inclination AB is multiplied by an accelerator-to-brake changeover time deviation preset value t.sub.1, and the accelerator-to-brake changeover vehicle speed deviation from the judgment standard point A to a changeover judgment point E for changeover at the current time instant is calculated by addition of the product and an accelerator-to-brake changeover vehicle speed deviation preset value V.sub.1.

The disclosure provides a vehicle performance test device, capable of facilitating the wear resistance of a rear roller and thereby reducing testing cost. A vehicle performance test device according to an embodiment includes: a test bed, configured to support a vehicle; and a front roller and a rear roller, disposed in pair on the test bed and spaced apart in a vehicle front-rear direction to support a wheel of the vehicle. The wheel of the vehicle is placed between the front roller and the rear roller to test braking performance of the vehicle. An electrodeposition particle layer is formed on a surface of the rear roller by electrodepositing rigid particles on a metal plating layer.

To obtain vehicle speed deviation data for changeover between accelerator and brake properly with inclination of a standard mode. In technique of calculating a changeover vehicle speed deviation from accelerator to brake in driving vehicle along standard mode (target vehicle speed) of vehicle drive pattern defined by time and vehicle speed within range of predetermined vehicle speed and time deviations from standard mode, an inclination AB of the standard mode is calculated by approximate differentiation of vehicle speed at a judgment standard point A of a current time instant on standard mode, first inclination AB is multiplied by an accelerator-to-brake changeover time deviation preset value t.sub.1, and the accelerator-to-brake changeover vehicle speed deviation from the judgment standard point A to a changeover judgment point E for changeover at the current time instant is calculated by addition of the product and an accelerator-to-brake changeover vehicle speed deviation preset value V.sub.1.

A device for applying vibrations to and for testing a brake system of the passenger car, which device has a platform on which the passenger car is placeable. The platform includes a plurality of rollers whereon a wheel of the passenger car is positionable on each respective roller. Each roller is driven by a drive with a measuring device to measure force exerted on the roller. Each roller has a first relief zone and a second relief-free zone. In a first position the car is located with the wheels on the first zones and in a second position is located with the wheels on the second zones. In the first position vibrations are applied to the car by the relief by rotation of the rollers and so that in the second position the brake system of the cars can be tested by measuring the force exerted by the brake system.

A device for testing a brake system and at least one driving assistance system of a vehicle, which device has a platform on which the vehicle is placeable, where the platform is provided with a plurality of sets of rollers and where a respective wheel of the vehicle is positionable on each respective set of rollers. The plurality of sets of rollers are driveable by a respective drive with a measuring device which is configured to measure a force exerted on the roller for the purpose of performing the test of the brake system on the vehicle. The device includes, at the position of each pair of rollers, an aligning means configured to position the vehicle at a predetermined location on the rollers so that the at least one driving assistance system can be tested.

An anti-force brake testing platform for an electric vehicle based on model predictive control (MPC) includes a first testing unit; a second testing unit; a third testing unit; a fourth testing unit; a wheelbase adjustment device; and a control cabinet system. The first and second testing units are structurally identical and have the same height, and are provided at the same horizontal foundation plane, with each including a first driving device, a first roller group, a first lifting device, a steering device, a frame, and a first control and test device. The third and fourth testing units are structurally identical, with each including a second driving device, a second roller group, a second lifting device, an anti-slip stopping mechanism, a first fixed base frame, a locking mechanism, and a second control and test device. The wheelbase adjustment device includes a second fixed base frame and a movable stand.

The disclosure provides a vehicle performance test device, capable of facilitating the wear resistance of a rear roller and thereby reducing testing cost. A vehicle performance test device according to an embodiment includes: a test bed, configured to support a vehicle; and a front roller and a rear roller, disposed in pair on the test bed and spaced apart in a vehicle front-rear direction to support a wheel of the vehicle. The wheel of the vehicle is placed between the front roller and the rear roller to test braking performance of the vehicle. An electrodeposition particle layer is formed on a surface of the rear roller by electrodepositing rigid particles on a metal plating layer.