A control system performs a method for controlling pitching and bouncing
of a vehicle having an engine driving wheels through a transmission, and
having a fuel control unit for supplying a variable amount of fuel to the
engine in response to fuel control signals generated by an engine control
unit. The method includes, from front and rear acceleration signals,
generating vehicle pitch and bounce signals, converting the pitch and
bounce signals to RMS pitch and bounce values, generating a fuel offset
value as a function of the RMS pitch and bounce values, and modifying
fuel delivered to the engine as a function of the fuel offset value. The
fuel offset value is operate don by a bi-linear gain function wherein
negative values are multiplied by a larger gain and positive values are
multiplied by a smaller gain.