Compensations
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Content
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Stable idle compensation (immediately after start)
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In order to stabilize idle speed immediately after start, target
opening angle is kept big and then gradually reduced. Compensation values are set based on the
engine coolant temperature.
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Rotation speed feedback compensation (while idling)
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In case there is a difference between the target idle speed and actual
engine speed, engine-ECU compensates the throttle valve opening angle based on that difference.
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Atmospheric pressure compensation
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At high altitudes atmospheric pressure is less and the intake air
density is low. So, the target opening angle is compensated based on atmospheric pressure.
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Engine coolant temperature compensation
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Compensation is made according to the engine coolant temperature.
The lower the engine coolant temperature the greater the throttle valve opening angle.
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Electric load compensation
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Throttle opening angle is compensated according to electric load.
The greater the electric load, the greater the throttle valve opening angle.
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Compensation when shift is in D range
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When transmission is changed from P or N range to some other range,
throttle valve opening angle is increased to prevent reduction in engine speed.
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Compensation when A/C is functioning
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Throttle opening angle is compensated according to functioning of
A/C compressor. While A/C compressor is being driven, the throttle valve opening angle is increased.
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Power steering fluid pressure compensation
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Throttle opening angle is compensated according to power steering
functioning. When power steering oil pressure rises and power steering pressure fluid switch
is ON, the throttle opening angle is increased.
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