WASTEGATE CONTROL OPERATION[L3 Turbo]

id0140b6101500

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 (%)

Throttle valve opening angle

Engine speed (rpm)

18.75% or more

Below 1,500

100

1,500—2,500

Approx. 60

2,500—3,500

Approx. 40

Approx. 4,000

Approx. 50

Approx. 4,500

Approx. 60

Approx. 5,000

Approx. 80

Approx. 5,500

Approx. 70

Approx. 6,000

Approx. 40

6,000 or more

0

Below 18.75%

All range

0

Condition	Wastegate control solenoid valve Duty value (%)
18.75% or more	Below 1,500	100
1,500—2,500	Approx. 60
2,500—3,500	Approx. 40
Approx. 4,000	Approx. 50
Approx. 4,500	Approx. 60
Approx. 5,000	Approx. 80
Approx. 5,500	Approx. 70
Approx. 6,000	Approx. 40
6,000 or more	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
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
Acceleration correction	• Improves acceleration feel	• Accellation pedal depression speed is specified value or more and accelerator pedal is fully depressed→large correction
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

Condition		Wastegate control solenoid valve Duty value (%)
Throttle valve opening angle	Engine speed (rpm)	Wastegate control solenoid valve Duty value (%)
18.75% or more	Below 1,500	100
	1,500—2,500	Approx. 60
	2,500—3,500	Approx. 40
	Approx. 4,000	Approx. 50
	Approx. 4,500	Approx. 60
	Approx. 5,000	Approx. 80
	Approx. 5,500	Approx. 70
	Approx. 6,000	Approx. 40
	6,000 or more	0
Below 18.75%	All range	0