Denso 4D56 Service Manual page 35

Operation Section
1 30
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Conditions for Start of Control
Accelerator Opening
Vehicle Speed
Coolant Temperature
Air Conditioner S/W
• The target speed varies, depending on the ON/OFF state of the air conditioner and the coolant temperature.
(5) Idle Vibration Reduction Control
• In order to reduce vibration during idling, the angular (time difference between A and B [C and D]) speed of each cylinder is detected
using the speed pulse signal to control the injection quantity of each cylinder. As a result crank angle speed becomes more uniform
and smoother engine operation is achieved.
•Coolant Temperature
•Air Conditioner Load
•Gear Position
Neutral S/W
[Target speed]
800
Coolant water temperature (°C)
Control Conditions
Injection
Quantity
Correction
Comparison
A/C ON/OFF
20
Target Speed
Calculation
QD1172
Q001254E