Measuring and testing – Vehicle chassis – Steering
Patent
1995-04-10
1996-04-16
Chilcot, Richard
Measuring and testing
Vehicle chassis
Steering
G01M 1500
Patent
active
055071805
ABSTRACT:
A signal indicating that a road on which a vehicle is travelling is not a rough road is output when a fluctuation frequency of an engine rotational speed and a fluctuation frequency of a combustion pressure are in approximate agreement, and a fluctuation amplitude of an engine rotational speed is greater by a predetermined value or above than a fluctuation amplitude of a combustion pressure. In other cases a signal indicating that the road on which the vehicle is travelling is not a rough road is output. During rough road travel, misfire detection based on engine rotational speed or combustion pressure is inhibited.
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Chilcot Richard
Dombroske George M.
Unisia Jecs Corporation
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