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US 7,007,548 B2Granted
Road test simulator with plural rollers
AssigneeSiemens Aktiengesellschaft
InventorsLars Jahn, Otto Zinth
Life of this patent
Estimating the term…
Abstract
A road test simulator having four rollers, each provided with an uneven surface coating, and four asynchronous motors, each of which drives one of the rollers.
Claims20
Road test simulator comprising:
- four rollers, each of which has an irregular surface cover, and
- four asynchronous motors, each of which drives a respective one of the rollers;
- wherein the rollers each comprise a plurality of coating rows extending in axial direction along respective outer circumferences of the rollers.
Road test simulator comprising:
- four rollers, each of which has an irregular surface cover;
- four asynchronous motors, each of which drives a respective one of the rollers;
- and
- control units, each of which controls speed and angular synchronism of a respective one of the rollers,
- wherein each of the rollers comprises a reference position sensor.
2 more elements
Road test simulator comprising:
- four rollers, each of which has an irregular surface cover;
- four asynchronous motors, each of which drives a respective one of the rollers;
- and
- control units, each of which controls speed and angular synchronism of a respective one of the rollers,
- wherein the control units are configured to control the asynchronous motors to operate with a selectable angle offset between the rollers.
2 more elements
Road test simulator comprising:
- four rollers, each of which has an irregular surface cover;
- four asynchronous motors, each of which drives a respective one of the rollers;
- and
- control units, each of which controls speed and angular synchronism of a respective one of the rollers,
- wherein the control units provide one of the rollers a master function and remaining ones of the rollers a slave function.
2 more elements
Road test simulator comprising:
- four rollers, each of which has an irregular surface cover;
- four asynchronous motors, each of which drives a respective one of the rollers;
- and
- control units, each of which controls speed and angular synchronism of a respective one of the rollers,
- wherein the control units provide two operating modes, wherein:
- in the first operating mode, the rollers are driven by the asynchronous motors and the motor vehicle is operated in neutral, and
- in the second operating mode, the rollers are driven by the motor vehicle.
4 more elements
Dependencies are inferred from the claim text.