ENGINE CONTROL SYSTEM [SKYACTIV-X 2.0]

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Outline

• L-jetronic^*1 and D-jetronic^*2 type detectors have been combined for intake air amount detection, improving the accuracy of the intake air amount measurement.

― MAF sensor adopted

― MAP sensor adopted

― IAT sensor No.1 and No.2 adopted

― Boost air temperature sensor and boost pressure sensor adopted

• Valve timing control has been adopted on both sides of the intake and exhaust, improving fuel economy and emission performance.

Electric variable valve timing control

― Intake CMP sensor adopted

― Exhaust CMP sensor adopted

― Electric variable valve timing motor/driver adopted

― Electric variable valve timing relay adopted

• Engine oil variable control has been adopted reducing engine load.

― Engine oil variable control

• Engine oil solenoid valve adopted

• The coolant switching valve is opened/closed according to changes in the engine coolant temperature to control the engine coolant flow volume.

• Further engine warming has been promoted by blocking each water passage while the engine is cool.

― Water flow control

• Coolant switching valve adopted

• Electric thermostat adopted

― Electric water pump control

• Electric water pump adopted

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

― Fuel pump control module adopted

• Gasoline particulate filter regeneration is performed according to changes in the gasoline particulate filter pressure to eliminate PM from the exhaust gas.

― Gasoline particulate filter regeneration control

• GPF pressure sensor adopted

• The fresh-air duct valve is switched according to changes in the ambient temperature to adjust the intake air to the optimum temperature.

― Fresh-air duct control

• Fresh-air duct valve adopted

• Fresh-air duct valve actuator adopted

• Fresh-air duct position sensor adopted

• The air bypass valve is opened/closed according to changes in the air charging pressure to adjust it to the optimum pressure.

― Air bypass control

• Air bypass valve adopted

• Air bypass valve position sensor adopted

• The required swirl in the cylinder of the intake air downstream is generated to prompt the formation of air-fuel mixture that follows.

― Swirl control

• Swirl control valve adopted

• Swirl control valve position sensor adopted

• Compressed intake air is supplied into the cylinder achieving compression ignition.

• The combustion condition in the cylinder is detected to achieve compression ignition.

― Supercharger control

• Supercharger adopted

• Supercharger speed sensor adopted

• Feedback of the combustion results detected by the cylinder pressure sensor is sent to each control to achieve the targeted combustion.

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*1 :Measures the intake air amount directly using the MAF sensor.

*2 :Measures the intake air pressure introduced into the cylinder using the MAP sensor and calculates the intake air amount indirectly.

Structural View

Input device

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* :Vehicles with fresh-air duct valve actuator

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Output device

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System Diagram

Input device

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* :Vehicles with fresh-air duct valve actuator

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Output device

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* :Vehicles with fresh-air duct valve actuator

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System Wiring Diagram

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Block Diagram

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*1 :TCM (ATX), electronically controlled brake unit, BCM, ESU, instrument cluster, EPS control module

*2 :Vehicles with fresh-air duct valve actuator

Relation Chart

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

×: Applicable

Item

MAIN RELAY CONTROL

DRIVE-BY-WIRE CONTROL

ELECTRIC VARIABLE VALVE TIMING CONTROL

FUEL INJECTION CONTROL SYSTEM

EXHAUST SHUTTER VALVE CONTROL

ELECTRIC WATER PUMP CONTROL

FUEL PUMP CONTROL

HIGH PRESSURE FUEL PUMP CONTROL

ELECTRONIC SPARK ADVANCE CONTROL

EGR CONTROL

PURGE CONTROL

AIR FUEL RATIO (A/F) SENSOR HEATER CONTROL

HEATED OXYGEN SENSOR (HO2S) HEATER CONTROL

A/C CUT-OFF CONTROL

ELECTRICAL FAN CONTROL

STARTER CUT-OFF CONTROL

INTEGRATED STARTER GENERATOR (ISG) CONTROL

i-stop CONTROL

ENGINE OIL VARIABLE CONTROL

WATER FLOW CONTROL

FRESH-AIR DUCT CONTROL

SUPERCHARGER CONTROL

SWIRL CONTROL

AIR BYPASS CONTROL

GASOLINE PARTICULATE FILTER REGENERATION CONTROL

Input device

IG1 relay No.1, No.2

×

×

×

×

×

×

×

×

×

APP sensor No.1, No.2

×

×

×

×

×

×

×

×

×

×

TP sensor No.1, No.2

×

×

×

×

MAF sensor

×

×

×

×

×

×

×

×

×

×

×

×

IAT sensor No.1, No.2

×

×

×

×

×

×

×

×

×

×

×

×

×

×

MAP sensor

×

×

×

×

×

×

×

×

×

×

ECT sensor No.1, —No.3

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

BARO sensor

×

×

×

×

×

×

×

×

×

×

Low fuel pressure sensor

×

×

×

×

×

High fuel pressure sensor

×

×

×

×

×

Low fuel temperature sensor

×

High fuel temperature sensor

×

CKP sensor

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

Intake CMP sensor

×

×

×

×

×

Exhaust CMP sensor

×

×

×

×

×

Brake switch (No.1, No.2 signal)

×

×

Transaxle range sensor (ATX)

×

×

×

×

×

Neutral sensor (MTX)

×

×

×

×

×

Clutch stroke sensor (MTX)

×

×

×

×

Starter interlock switch (MTX)

×

A/F sensor

×

×

×

HO2S

×

Engine oil temperature sensor

×

×

×

Engine oil pressure sensor

×

Boost air temperature sensor

×

×

×

Boost pressure sensor

×

×

×

Supercharger speed sensor

×

×

×

Swirl control valve position sensor

×

Air bypass valve position sensor

×

Cylinder pressure sensor

×

×

Exhaust shutter valve position sensor

×

EGR valve position sensor

×

EGR pressure sensor

×

Battery

×

×

×

×

×

×

Mazda M hybrid battery

×

×

DC-DC converter (Mazda M hybrid)

×

Electronically controlled brake unit

×

GPF pressure sensor

×

Electric variable timing motor/driver (actual motor speed/actual rotation)

×

×

Stroke sensor

×

Refrigerant pressure sensor No.1, No.2

×

×

ABS wheel-speed sensor

×

CAN^*1

×

×

×

×

×

×

×

×

×

×

×

Output device

Main relay

×

Throttle valve actuator

×

×

×

Electric variable valve timing motor/driver

×

×

Electric variable valve timing relay

×

×

Fuel injector No.1, —No.4

×

×

×

Exhaust shutter valve

×

Electric water pump

×

Fuel pump control module

×

Fuel pump relay

×

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

×

×

Starter relay

×

×

ISG

×

×

DC-DC converter (Mazda M hybrid)

×

Injector relay

×

Engine oil solenoid valve

×

Coolant switching valve

×

Electric thermostat

×

Fresh-air duct valve actuator^*2

×

Supercharger clutch

×

Swirl control valve actuator

×

Air bypass valve

×

×

Active air shutter

×

*1 :TCM (ATX), electronically controlled brake unit, BCM, ESU, instrument cluster, EPS control module

*2 :Vehicles with fresh-air duct valve actuator

Item	MAIN RELAY CONTROL	DRIVE-BY-WIRE CONTROL	ELECTRIC VARIABLE VALVE TIMING CONTROL	FUEL INJECTION CONTROL SYSTEM	EXHAUST SHUTTER VALVE CONTROL	ELECTRIC WATER PUMP CONTROL	FUEL PUMP CONTROL	HIGH PRESSURE FUEL PUMP CONTROL	ELECTRONIC SPARK ADVANCE CONTROL	EGR CONTROL	PURGE CONTROL	AIR FUEL RATIO (A/F) SENSOR HEATER CONTROL	HEATED OXYGEN SENSOR (HO2S) HEATER CONTROL	A/C CUT-OFF CONTROL	ELECTRICAL FAN CONTROL	STARTER CUT-OFF CONTROL	INTEGRATED STARTER GENERATOR (ISG) CONTROL	i-stop CONTROL	ENGINE OIL VARIABLE CONTROL	WATER FLOW CONTROL	FRESH-AIR DUCT CONTROL	SUPERCHARGER CONTROL	SWIRL CONTROL	AIR BYPASS CONTROL	GASOLINE PARTICULATE FILTER REGENERATION CONTROL
Input device
IG1 relay No.1, No.2	×			×			×		×			×	×		×	×		×
APP sensor No.1, No.2		×		×					×		×			×	×		×	×				×			×
TP sensor No.1, No.2		×		×										×				×
MAF sensor		×	×	×				×	×	×	×				×			×		×			×		×
IAT sensor No.1, No.2		×	×	×	×				×	×	×				×			×		×	×	×	×	×
MAP sensor		×	×	×		×			×	×	×							×					×	×
ECT sensor No.1, —No.3		×	×	×	×	×		×	×	×	×			×	×	×		×	×	×			×		×
BARO sensor		×	×	×		×	×			×	×				×			×						×
Low fuel pressure sensor		×		×			×	×										×
High fuel pressure sensor		×		×			×	×										×
Low fuel temperature sensor								×
High fuel temperature sensor								×
CKP sensor		×	×	×	×	×	×	×	×	×	×			×	×	×		×	×	×	×	×	×	×	×
Intake CMP sensor		×	×	×					×									×
Exhaust CMP sensor		×	×	×					×									×
Brake switch (No.1, No.2 signal)		×																×
Transaxle range sensor (ATX)		×		×												×		×							×
Neutral sensor (MTX)				×					×					×				×							×
Clutch stroke sensor (MTX)				×					×					×				×
Starter interlock switch (MTX)																×
A/F sensor				×							×														×
HO2S				×
Engine oil temperature sensor		×	×																×
Engine oil pressure sensor																			×
Boost air temperature sensor			×																				×	×
Boost pressure sensor										×													×	×
Supercharger speed sensor										×												×		×
Swirl control valve position sensor																							×
Air bypass valve position sensor																								×
Cylinder pressure sensor				×					×
Exhaust shutter valve position sensor					×
EGR valve position sensor										×
EGR pressure sensor										×
Battery							×	×	×		×						×	×
Mazda M hybrid battery																	×	×
DC-DC converter (Mazda M hybrid)																	×
Electronically controlled brake unit																	×
GPF pressure sensor																									×
Electric variable timing motor/driver (actual motor speed/actual rotation)			×															×
Stroke sensor																		×
Refrigerant pressure sensor No.1, No.2														×	×
ABS wheel-speed sensor																				×
CAN^*1		×		×			×		×					×	×	×		×		×		×			×
Output device
Main relay	×
Throttle valve actuator		×																×							×
Electric variable valve timing motor/driver			×															×
Electric variable valve timing relay			×															×
Fuel injector No.1, —No.4				×														×							×
Exhaust shutter valve					×
Electric water pump						×
Fuel pump control module							×
Fuel pump relay							×
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															×										×
Starter relay																×		×
ISG																	×	×
DC-DC converter (Mazda M hybrid)																		×
Injector relay																		×
Engine oil solenoid valve																			×
Coolant switching valve																				×
Electric thermostat																				×
Fresh-air duct valve actuator^*2																					×
Supercharger clutch																						×
Swirl control valve actuator																							×
Air bypass valve																								×	×
Active air shutter																									×