WASTEGATE CONTROL OPERATION [L3 Turbo]

Basic Operation Condition

• Under the following conditions, the PCM operates the wastegate control solenoid valve to adjust the air charging pressure to the target value with the duty value that matches the condition.


Condition		Wastegate control solenoid valve Duty value (%)
Accelerator opening angle	Engine speed (rpm)	Wastegate control solenoid valve Duty value (%)
18.75% or more	Below 2250	100
	2500-4500	Approx. 60
	Approx. 5000	Approx. 70
	Approx. 5500	Approx. 80
	Approx. 6000	Approx. 55
	Approx. 6500	Approx. 30
	Approx. 7000	0
Below 18.75%	All range	0

Feedback operation control

• While driving with the air charging pressure at more than a given value, feedback control is performed so that air charging can be performed between the maximum and minimum values.

- Maximum value: If the air charging pressure increases excessively, the intake air system connection area may be disengaged or the components may be damaged. This is a threshold value to prevent such damage.

- Minimum value: If the air charging pressure decreases excessively, the wastegate actuator cannot be operated. This is the limit value to operate the actuator.

Correction

Name

Contents

Purpose

Correction amount

Intake air charging temperature correction

• Improves injection efficiency when intake air density is low

• High intake airflow temperature→large correction

Barometric pressure correction

• The intake air amount increases when air density is low, preventing excessive turbocharger speed.

• High barometric pressure→large correction

Battery voltage correction

• Controls basic duty value deviation due to supply voltage increase/decrease

• Low battery voltage→large correction

Air charging pressure guard feedback correction

• Prevents excessive turbocharger speed

• High barometric pressure→large correction

• High engine speed→small correction

Acceleration correction

• Improves acceleration feel

• Rapid acceleration and fully depressed accelerator pedal

Charging efficiency feedback correction

• Prevents engine damage

• Charging efficiency is less than target charging efficiency→volume increase correction

• Charging efficiency is more than target charging efficiency→decrease correction

Name	Contents
Name	Purpose	Correction amount
Intake air charging temperature correction	• Improves injection efficiency when intake air density is low	• High intake airflow temperature→large correction
Barometric pressure correction	• The intake air amount increases when air density is low, preventing excessive turbocharger speed.	• High barometric pressure→large correction
Battery voltage correction	• Controls basic duty value deviation due to supply voltage increase/decrease	• Low battery voltage→large correction
Air charging pressure guard feedback correction	• Prevents excessive turbocharger speed	• High barometric pressure→large correction • High engine speed→small correction
Acceleration correction	• Improves acceleration feel	• Rapid acceleration and fully depressed accelerator pedal
Charging efficiency feedback correction	• Prevents engine damage	• Charging efficiency is less than target charging efficiency→volume increase correction • Charging efficiency is more than target charging efficiency→decrease correction