ENGINE CONTROL SYSTEM [SKYACTIV-G (WITHOUT CYLINDER DEACTIVATION (E))]

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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

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

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 reducing engine load.

― Engine oil solenoid valve adopted

• The engine coolant control valve adjusts the engine coolant control valve opening angle and supplies engine coolant to the appropriate engine coolant passage according to the changes in the engine coolant temperature.

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

― Coolant control valve adopted

• DC-DC converter control has been adopted for improved power supply stability.

― DC-DC converter adopted

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

― Fuel pump control module adopted

• Generator output control adopted, fuel economy/idling stability improved. (with i-stop system)

― Current sensor adopted

*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

With Mazda M Hybrid

Input device

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Without Mazda M Hybrid

Input device

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With Mazda M Hybrid

Output device

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Without Mazda M Hybrid

Output device

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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 :TCM (ATX), DSC HU/CM (without Mazda M Hybrid), Electronically controlled brake unit (with Mazda M Hybrid), BCM, ESU, instrument cluster, EPS control module

*2 :With Mazda M Hybrid

*3 :Without Mazda M Hybrid

Relation Chart

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

×: Applicable

Item

MAIN RELAY CONTROL

DRIVE-BY-WIRE CONTROL

HYDRAULIC VARIABLE VALVE TIMING CONTROL

ELECTRIC VARIABLE VALVE TIMING CONTROL

FUEL INJECTION CONTROL SYSTEM

FUEL PUMP CONTROL

HIGH PRESSURE FUEL PUMP CONTROL

ELECTRONIC SPARK ADVANCE 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

GENERATOR CONTROL

INTEGRATED STARTER GENERATOR (ISG) CONTROL

i-stop CONTROL

DC-DC CONVERTER CONTROL

ENGINE OIL VARIABLE CONTROL

WATER FLOW CONTROL

Input device

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 No.1, No.2

×

×

×

×

×

×

×

×

×

×

×

Fuel pressure sensor

×

×

×

×

BARO sensor

×

×

×

×

×

×

Power brake unit vacuum sensor*3

×

Exhaust shutter valve position sensor

Engine oil temperature sensor

×

×

×

×

Coolant control valve position sensor

×

Ion sensor No.1—No.4

×

×

KS

×

A/F sensor

×

×

HO2S

×

Refrigerant pressure sensor No.1, No.2

×

×

IG1 relay No.1, No.2

×

×

×

×

×

×

×

×

×

×

×

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

×

×

Transaxle range sensor (ATX)

×

×

×

×

Neutral sensor No.1, No.2 (MTX)

×

×

×

×

Clutch stroke sensor (MTX)

×

×

×

×

Starter interlock switch (MTX)

×

Electric variable valve timing motor/driver

×

×

Battery

×

×

×

×

×

×

×

×

×

Generator (Stator coil)*³

×

Mazda M Hybrid battery*²

×

×

Stroke sensor^*2

×

Electronically controlled brake unit^*2

×

DC-DC converter (Mazda M Hybrid)^*2

×

CAN^*1

×

×

×

×

×

×

×

×

×

×

×

Output device

Main relay

×

Throttle valve actuator

×

Electric variable valve timing motor/driver

×

×

Electric variable valve timing relay

×

OCV

×

Fuel injector No.1—No.4

×

×

Sub relay

×

Fuel pump control module

×

Fuel pump relay

×

Spill valve control solenoid valve (High pressure fuel pump)

×

Ignition coil No.1—No.4

×

Purge solenoid valve

×

A/F sensor heater

×

HO2S heater

×

A/C relay

×

Cooling fan relay No.1, No.2

×

Starter relay

×

×

Generator (Field coil)^*3

×

×

DC-DC converter^*3

×

×

DC-DC converter (Mazda M Hybrid)^*2

×

Spark plug

Oil pump

Engine oil solenoid valve

×

Coolant control valve

×

ISG^*2

×

*1 :TCM (ATX), DSC HU/CM (without Mazda M Hybrid), Electronically controlled brake unit (with Mazda M Hybrid), BCM, ESU, instrument cluster, EPS control module

*2 :With Mazda M Hybrid

*3 :Without Mazda M Hybrid

Item	MAIN RELAY CONTROL	DRIVE-BY-WIRE CONTROL	HYDRAULIC VARIABLE VALVE TIMING CONTROL	ELECTRIC VARIABLE VALVE TIMING CONTROL	FUEL INJECTION CONTROL SYSTEM	FUEL PUMP CONTROL	HIGH PRESSURE FUEL PUMP CONTROL	ELECTRONIC SPARK ADVANCE 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	GENERATOR CONTROL	INTEGRATED STARTER GENERATOR (ISG) CONTROL	i-stop CONTROL	DC-DC CONVERTER CONTROL	ENGINE OIL VARIABLE CONTROL	WATER FLOW CONTROL
Input device
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 No.1, No.2		×			×		×	×	×			×	×	×			×		×	×
Fuel pressure sensor		×			×		×										×
BARO sensor		×		×	×				×				×				×
Power brake unit vacuum sensor*3																	×
Exhaust shutter valve position sensor
Engine oil temperature sensor		×	×	×																×
Coolant control valve position sensor																				×
Ion sensor No.1—No.4				×	×
KS								×
A/F sensor					×				×
HO2S					×
Refrigerant pressure sensor No.1, No.2												×	×
IG1 relay No.1, No.2	×		×		×	×		×		×	×		×	×			×	×
Brake switch (No.1, No.2 signal)		×															×
Transaxle range sensor (ATX)		×			×									×			×
Neutral sensor No.1, No.2 (MTX)					×			×				×					×
Clutch stroke sensor (MTX)					×			×				×					×
Starter interlock switch (MTX)														×
Electric variable valve timing motor/driver				×													×
Battery			×			×	×	×	×						×	×	×			×
Generator (Stator coil)*³		×
Mazda M Hybrid battery*²																×	×
Stroke sensor^*2																	×
Electronically controlled brake unit^*2																×
DC-DC converter (Mazda M Hybrid)^*2																×
CAN^*1		×			×	×		×				×	×	×	×		×	×		×
Output device
Main relay	×
Throttle valve actuator		×
Electric variable valve timing motor/driver				×	×
Electric variable valve timing relay				×
OCV			×
Fuel injector No.1—No.4					×												×
Sub relay					×
Fuel pump control module						×
Fuel pump relay						×
Spill valve control solenoid valve (High pressure fuel pump)							×
Ignition coil No.1—No.4								×
Purge solenoid valve									×
A/F sensor heater										×
HO2S heater											×
A/C relay												×
Cooling fan relay No.1, No.2													×
Starter relay														×			×
Generator (Field coil)^*3															×		×
DC-DC converter^*3																	×	×
DC-DC converter (Mazda M Hybrid)^*2																	×
Spark plug
Oil pump
Engine oil solenoid valve																			×
Coolant control valve																				×
ISG^*2																×