ENGINE CONTROL SYSTEM [SKYACTIV-G 2.5T]

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Outline

• L-jetronic^*1 and D-jetronic^*2 types have been adopted for the intake air amount measurement to realize stable combustion free from abnormal combustion.

― MAF sensor adopted

― MAP sensor adopted

― IAT sensor No.1 and No.2 adopted

― Boost pressure sensor and boost air temperature sensor adopted

• To improve the fuel economy and emission performance, an electric variable valve timing control has been adopted for the intake side, and a hydraulic variable valve timing control for the exhaust side. The electric type is adopted for the intake side to achieve expanded valve overlap and delayed closing of the intake valve (enlarged intake valve opening angle).

Intake side: Electric variable valve timing control

― Intake CMP sensor adopted

― Electric variable valve timing motor/driver adopted

― Electric variable valve timing relay adopted

Exhaust side: Hydraulic variable valve timing control

― Exhaust CMP sensor adopted

• Engine oil variable control has been adopted to reduce the oil pump operation load on the engine.

― Engine oil solenoid valve adopted

• With the adoption of fuel pump control, fuel pump power consumption has been reduced to improve fuel economy.

― Fuel pump control module adopted

• Boost control has been adopted to improve fuel economy/environmental performance/low-speed torque.

― Dynamic pressure turbo adopted

• To decrease generator operation loss, i-ELOOP has been adopted which generates electricity from energy occurring when the vehicle decelerates. (With i-ELOOP) (See i-ELOOP [i-ELOOP].)

― DC-DC converter (i-ELOOP) adopted

• Generator output control has been adopted to improve fuel economy/idling stability.

― A current sensor adopted (With i-stop system)

• To improve engine reliability, an ion sensor has been adopted which detects pre-ignition.

• LIN communication has been adopted to the current sensor to realize wiring harness simplification. (With i-stop system)

• i-stop control has been adopted to improve fuel efficiency, and reduce exhaust gas and idling noise. (With i-stop system)

*1 :The intake air amount is directly detected by measuring the amount of intake air flow using the MAF sensor.

*2 :The intake air amount is detected indirectly by measuring the intake manifold pressure (pressure between downstream of the turbocharger and intake manifold) using the MAP sensor and boost pressure sensor.

Structure

System structure

Input device

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*1 :IG1 relay

*2 :With i-stop system

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Output device

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*1 :Main relay, fuel injector relay, fuel pump relay, A/C relay, starter relay, electric variable valve timing relay

*2 :Cooling fan relay

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System Diagram

Input device

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Output device

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System Wiring Diagram

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Block Diagram

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*1 :DSC HU/CM, TCM, instrument cluster, front body control module (FBCM), start stop unit

*2 :Current sensor

*3 :With i-stop system

*4 :Taiwan

Relation Chart

• Each control system and their related input and output parts are as follows.

Input device

×: Applicable

Item
APP sensor No.1, No.2		×	×	×		×			×		×			×	×			×
TP sensor No.1, No.2		×				×				×				×				×
MAF sensor		×	×	×	×	×		×	×	×	×	×	×		×			×
IAT sensor No.1		×	×		×	×			×	×	×				×			×
IAT sensor No.2		×	×		×	×			×									×
MAP sensor		×	×		×	×			×	×	×							×
CKP sensor		×	×	×	×	×	×	×	×	×	×	×	×	×	×	×	×	×	×
Intake CMP sensor		×			×	×			×									×
Exhaust CMP sensor		×		×		×		×	×									×	×
ECT sensor		×		×	×	×		×	×	×	×	×	×	×	×	×		×	×
High fuel pressure sensor		×				×	×	×										×
BARO sensor		×	×		×	×	×				×				×			×
Ion sensor No.1—No.4					×	×
KS									×
A/F sensor						×					×
HO2S						×
Boost pressure sensor		×	×		×						×
Boost air temperature sensor			×
Exhaust gas pressure sensor										×
Low fuel pressure sensor							×
Fuel temperature sensor							×
Engine oil pressure sensor																			×
Engine oil temperature sensor																			×
Wastegate valve position sensor			×
Refrigerant pressure sensor														×	×
IG1 relay	×		×	×		×	×		×			×	×		×	×		×
Transaxle range sensor																		×
Brake switch (No.1 signal)		×																×
Brake switch (No.2 signal)		×																×
Power brake unit vacuum sensor^*3																		×
Electric variable valve timing motor/driver					×													×
Battery			×	×			×	×	×		×						×	×
Generator (Stator coil)		×
CAN related parts^*1		×				×	×		×					×	×	×	×	×
LIN related parts^*2
Fuel tank pressure sensor^*4	Only used for OBD.

*1 :DSC HU/CM, TCM, instrument cluster, front body control module (FBCM), start stop unit

*2 :Current sensor

*3 :With i-stop system

*4 :Taiwan

Output device

×: Applicable

Item
Main relay	×
Throttle valve actuator		×																×
Air bypass valve			×
Three way solenoid valve			×
Wastegate valve actuator			×
OCV				×
Electric variable valve timing relay					×													×
Electric variable valve timing motor/driver					×	×												×
Fuel injector relay						×												×
Fuel injector No.1—No.4						×												×
Fuel pump relay							×
Fuel pump control module							×
Spill valve control solenoid valve (High pressure fuel pump)								×
Ignition coil No.1—No.4									×									×
EGR valve										×
Purge solenoid valve											×
A/F sensor heater												×
HO2S heater													×
A/C relay														×
Cooling fan relay															×
Fan control module															×
Starter relay																×		×
Generator (Field coil)																	×	×
Engine oil solenoid valve																			×
CV solenoid valve^*1	Only used for OBD.

*1 :Taiwan