Method of testing regenerative braking force in electric vehicle

Details Method of testing regenerative braking force in electric vehicle Method of testing regenerative braking force in electric vehicle

1998-01-23

2000-02-01

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Electric vehicle

303 3, 303152, 477188, 180 651, A61F 233

Patent

active

060213655

ABSTRACT:
In an electric vehicle having front wheels braked by regenerative braking and hydraulic braking and rear wheels hydraulically braked, it is possible to check the magnitude of the regenerative braking force easily and accurately, by using a two-axle chassis dynamometer. Assuming that the front wheel braking force F.sub.2 ' detected by the chassis dynamometer is the total braking force C.sub.2 ' of the front and rear wheels, the total braking force C2' is broken down into component forces according to braking force distribution ratio data previously stored in a memory, to calculate a reference regenerative braking force A.sub.2 'D.sub.2 '. Based on the actually detected pedal depressing force A.sub.2 and the distribution ratio data, an imaginary pedal depressing force A.sub.2 ' is calculated that is required to produce a total braking force of the driven wheels and follower wheels equal to the braking force F.sub.2 ', generated by the driven wheels in the actual pedal depressing force A.sub.2. Based on the imaginary pedal depressing force A.sub.2 ' and the distribution ratio data, the imaginary regenerative braking force A.sub.2 'D.sub.2 ' that is produced by the driven wheels in the imaginary pedal depressing force A.sub.2 ', is calculated and then compared with the reference regenerative braking force A.sub.2 'D.sub.2 '.

REFERENCES:
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patent: 5322352 (1994-06-01), Ohno et al.
patent: 5399000 (1995-03-01), Aoki et al.
patent: 5433512 (1995-07-01), Aoki et al.

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