Sensors and Actuators

In the M57D30T2 US engine, the modifications to the sensors and actuators are restricted to the air intake and exhaust system.

Several new components have been added to this system. The table below provides an overview. It shows a comparison between the E70 US and E90 US and the ECE variant (EURO4).

SENSOR REFERENCE CHART

Sensors	EURO 4	E70 US	E90 US
Outside temperature sensor	X	X	X
Ambient pressure sensor	X	X	X
HFM	X	X	X
Intake air temp sensor (in HFM)	X	X	X
Charge air temperature sensor	X	X	X
Boost pressure sensor	X	X	X
Exhaust pressure sensor at exhaust manifold (before DPF)	X	X	X
Oxygen sensor	X	X	X
Exhaust gas temperature sensor before diesel oxidation catalyst (DOC)	X	X	X
Exhaust gas temperature sensor before diesel particulate filter (DPF)	X	X	X
Exhaust backpressure sensor before diesel particulate filter (DPF)	X	-	-
Exhaust differential pressure sensor	-	X	X
Temperature sensor after LP-EGR cooler	-	X	-
Temperature sensor after HP-EGR cooler	-	X	X
Exhaust gas temperature sensor before SCR catalyst	-	X	X

SENSOR REFERENCE CHART

Sensors	EURO 4	E70 US	E90 US
NO_x sensor before SCR catalyst	-	X	X
NO_x sensor after SCR catalyst	-	X	X
Positional feedback swirl flaps	-	X	X
Positional feedback HP-EGR valve	-	X	X
Positional feedback LP-EGR valve	-	X	-
Blow-by connection	-	X	X

ACTUATOR REFERENCE CHART

Actuators	EURO 4	E70 US	E90 US
Compressor bypass valve	EUV	EUV	EUV
Turbine control valve	EPDW	EPDW	EPDW
Wastegate	EPDW	EPDW	EPDW
Throttle valve	EL	EL	EL
Swirl flaps	EUV	EL	EL
High pressure EGR valve	EPDW	EL	EL
Low pressure EGR valve	-	EPDW	-
Bypass valve for HP-EGR cooler	-	EUV	EUV
SCR metering valve		EL	EL
EL Electrically actuated EUV Vacuum controlled via electric changeover valve (on/off) EPDW Vacuum controlled via electro-pneumatic pressure converter (PWM controlled)