Apparatus and method for detecting a road surface condition of a

Details Apparatus and method for detecting a road surface condition of a Apparatus and method for detecting a road surface condition of a

1993-05-04

1995-01-17

Raevis, Robert

Measuring and testing

Surface and cutting edge testing

Roughness

G01B 528

Patent

active

053816889

ABSTRACT:
An apparatus for detecting a rough road running condition of a combustion engine car comprising means for calculating change values of an output rotational speed of the engine, means for calculating an instability of the measured change values, and means for judging the car to be on a rough road when the calculated instability is more than a predetermined amount.

REFERENCES:
patent: 4837727 (1989-06-01), Tashiro et al.
patent: 5044195 (1991-09-01), James
patent: 5216915 (1993-06-01), Sakamoto
patent: 5231869 (1993-08-01), Klenk et al.
patent: 5239473 (1993-08-01), Ribbens et al.
patent: 5263453 (1993-11-01), Wakahara et al.
patent: 5287736 (1994-02-01), Nakayama et al.
Plapp, et al. "Methods of On-Board Misfire Detection", 1990 SAE International Congress and Exposition, SAE '90, Feb. 26-Mar. 2, pp. 9-20.

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