ENGINE [SKYACTIV-G 2.5T]

id0100000002s4

Special Features

―  Sliding resistance^*1 reduction

•  Rocker arm (with built-in needle roller bearing) adopted for cam-contact area

•  Reduced valve spring load

•  Narrowed down crankshaft journal

•  Optimized piston skirt shape

•  Lowered piston ring tension

•  Lowered drive belt tension

•  Suppressed chain tensioner load by stabilized timing chain behavior

•  Oil shower pipe adopted

―  Mechanical resistance loss reduction

•  Optimized oil passage

•  Optimized oil pump shape

•  Engine oil variable control adopted

―  Pumping loss^*2 reduction

•  Variable valve timing mechanism adopted on both intake and exhaust sides for fine control of exhaust amount and internal EGR volume

―  Weight reductions

•  Hard-plastic intake manifold adopted

•  Exhaust manifold integrated cylinder head adopted

―  Heat loss reduction

•  Water jacket spacer adopted

―  Cooling loss reduction in early stage of combustion

•  Piston cavity adopted

―  Cooling efficiency improvement

•  Air seal cowl adopted

•  Optimized cooling fan shape

•  Optimized engine coolant passage

•  Optimized water pump impeller shape

―  Combustion efficiency improvement

•  Multiple hole-type fuel injectors adopted

•  High-pressure fuel pump adopted

―  MAF sensor adopted

―  MAP sensor adopted

―  IAT sensor No.1 and No.2 adopted

―  Boost pressure sensor and boost air temperature sensor adopted

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 solenoid valve adopted

―  Fuel pump control module adopted

―  Dynamic pressure turbo adopted

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

Specification

Item					Specification
MECHANICAL
Type					Gasoline, 4-cycle
Cylinder arrangement and number					In-line, 4-cylinder
Combustion chamber					Pentroof
Valve system					DOHC, timing chain driven, 16 valves
Displacement		(ml {cc})			2,488 {2,488}
Bore × stroke		(mm {in})			89.0 × 100 {3.50 × 3.94}
Compression ratio					10.5:1
Valve timing		IN	Open	(°)	BTDC 50—ATDC 24
			Close	(°)	ABDC 26—ABDC 100
		EX	Open	(°)	BBDC 50—BBDC 5
			Close	(°)	ATDC 2—ATDC 47
LUBRICATION SYSTEM
Type					Force-fed type
Oil pressure (reference value) [Oil temperature: 80—90 °C {176—194 °F}, coolant temperature: 80—90 °C {176—194 °F}]				(kPa {kgf/cm2, psi}[rpm])	Lo: 135—165 {1.38—1.68, 19.6—23.9} [1,500] Hi: 225—275 {2.30—2.80, 32.7—39.8} [4,500]
Oil pump	Type				Vane pump type
Oil filter	Type				Full-flow
	Bypass pressure		(kPa {kgf/cm2, psi})		140—180 {1.43—1.83, 20.4—26.1}
COOLING SYSTEM
Type					Water-cooled, Electromotive
Water pump		Type			Centrifugal, V-ribbed belt-driven
Thermostat		Type			Wax type
		Opening temperature		(°C {°F})	Australian specs.: 86.5—89.5 {188—193} Except Australian specs.: 80.5—83.5 {177—182}
		Full-open temperature		(°C {°F})	Australian specs.: 100 {212} Except Australian specs.: 95 {203}
		Full-open lift		(mm {in})	8.5 {0.33} or more
Radiator		Type			Corrugated fin type
Cooling system cap		Valve opening pressure		(kPa {kgf/cm2, psi})	93.2―122.6 {0.951―1.250, 13.6―17.7}
Cooling fan type		Type			Electric type
		Number of blades			Cooling fan No.1: 7 Cooling fan No.2: 10
		Outer diameter		(mm {in})	330 {13.0}
		Cooling fan motor output		(W)	413
FUEL SYSTEM
Fuel injector			Type		High resistance
			Fuel supply method		Top-feed
			Drive types		Electronic type
Fuel pressure			(kPa {kgf/cm2, psi})		545―695 {5.56―7.08, 79.1―100.0}
Fuel pump		Type			Electric type
Fuel tank		Capacity		(L {US gal, lmp gal})	58 {15, 13}
EMISSION SYSTEM
Catalyst		Type			WU-TWC (monolith) TWC (monolith)
EVAP control system		Type			Charcoal canister type
PCV system		Type			Closed type
CHARGING SYSTEM
Battery		Voltage		(V)	12
		Type (with i-stop)			Q-85
		Type and capacity (without i-stop)		(A·h/20HR)	55D23L (55) 75D23L (65)
Generator		Output		(V-A)	12-150
IGNITION SYSTEM
Ignition system		Type			SEI
		Spark advance			Electronic
		Firing order			1—3—4—2 (all cylinders independent firing)
Spark plug		Type			PY8V-18-110
STARTING SYSTEM
Starter		Type			Coaxial reduction
		Output		(kW)	1.4
CONTROL SYSTEM
i-stop OFF switch					ON/OFF type switch
MAF sensor					Hot film
IAT sensor No.1					Thermistor
IAT sensor No.2					Thermistor
MAP sensor					Piezoresistance
TP sensor					Hall element
APP sensor					Electromagnetic induction action applied to non-contact type
CKP sensor					Magnetic resistance element
Intake CMP sensor					Magnetic resistance element
Exhaust CMP sensor					Magnetic resistance element
ECT sensor					Thermistor
BARO sensor					Piezoelectric element
High fuel pressure sensor					Distortion gauge
Low fuel pressure sensor					Semiconductor strain gauge
KS					Piezoelectric element
Current sensor					Voltage detecting area/Current detecting area/Temperature detecting area
A/F sensor					Zirconium element
HO2S					Zirconia element
Boost pressure sensor					Piezoresistance
Boost air temperature sensor					Thermistor
Fuel temperature sensor					Thermistor
Exhaust gas pressure sensor					Piezoelectric element
Engine oil temperature sensor					Thermistor
Engine oil pressure sensor					Semiconductor strain gauge
Wastegate valve position sensor					Hall element
Engine oil level sensor					Piezoelectric element
Power brake unit vacuum sensor					Piezoelectric element
Ion sensor					Ion detection circuit

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Engine oil

Engine coolant capacity (approx. quantity)

Fuel type