AIM OF DEVELOPMENT

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Vehicle Outline

Exterior design

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Interior design

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Engine

•  SKYACTIV-G 2.5T, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (without cylinder deactivation), SKYACTIV-G 2.0, SKYACTIV-G 2.5 (with cylinder deactivation) and SKYACTIV-D 2.2 have been adopted.

Engine mechanical (SKYACTIV-G 2.5T)

•  For SKYACTIV-G 2.5T, the following has been implemented to lower fuel consumption.

―  Sliding resistance 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 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

―  The HLA has been adopted to achieve the maintenance-free valve clearance.

―  4-3-1 type exhaust passages have been adopted to improve the acceleration/environmental performance.

―  An ejector which can recirculate the evaporative gas in all engine ranges (boost range from non-boost range) has been adopted to improve the emission performance.

―  An exhaust gas recirculation (EGR) system has been adopted to achieve cleaner exhaust emissions and improve fuel economy.

Engine mechanical (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))

•  For SKYACTIV-G 2.0 and SKYACTIV-G 2.5 (without cylinder deactivation), the following is performed to lower fuel consumption.

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―  Improvement of mechanical resistance loss

•  Narrowed down crankshaft journal

•  Optimized piston skirt shape

•  Lowered piston ring tension

•  Roller follower adopted

•  Reduction of valve spring load

•  Stabilization of timing chain behavior

•  Optimized engine coolant passage

•  Optimized water pump impeller shape

•  Lowered drive belt tension

•  Optimized oil passage

•  Optimized oil pump shape

•  Oil pump discharging pressure control has been adopted.

―  Improvement of pumping loss

•  Variable valve timing mechanism has been adopted on both sides of intake and exhaust.

―  Cooling loss improvement (with coolant control valve)

•  Coolant control valve adopted

•  Optimized engine coolant passage

Engine mechanical (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))

•  For SKYACTIV-G 2.0, 2.5 (with cylinder deactivation), the following is performed to lower fuel consumption.

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―  Improvement of pumping loss

•  Cylinder deactivation control adopted

―  Cooling loss improvement

•  Coolant control valve adopted

•  Optimized engine coolant passage

Engine mechanical (SKYACTIV-D 2.2)

•  For SKYACTIV-D 2.2, the following is performed to lower fuel consumption.

―  Low compression ratio

•  Combustion efficiency by lower compression ratio (14.0) (fuel injector (2pin type))

•  Combustion efficiency by lower compression ratio (14.4) (fuel injector (6pin type))

―  Weight reductions

•  Aluminum alloy cylinder block adopted

•  Exhaust manifold integrated cylinder heads adopted

―  Weight reduction and mechanical resistance loss improvements

•  Piston shape optimized

•  Narrowed down crankshaft journal

•  The SKYACTIV-D 2.2 has adopted an IDEVA for improved ignition stability during cold engine starts. (Fuel injector (2pin type))

•  Two-step boost control has been adopted, realizing low emission, low fuel consumption, high torque, and high response.

•  An exhaust gas recirculation (EGR) system has been adopted for cleaner exhaust emissions and improved fuel efficiency.

•  i-stop control has been adopted for improved fuel efficiency, reduced exhaust gas emissions, and reduced idling noise.

Engine control [SKYACTIV-G 2.5T]

•  L-jetronic and D-jetronic 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

•  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)

Engine control (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))

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

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

•  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

•  i-stop control has been adopted for improved fuel efficiency, reduced exhaust gas emissions, and reduced idling noise. (with i-stop control)

Engine control (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))

•  Engine coolant is supplied to the appropriate engine coolant passage according to the engine load conditions.

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

―  Coolant control valve adopted

•  Pumping loss due to intake/exhaust stroke is reduced to improve fuel economy during low engine loads.

―  Cylinder deactivation control adopted

Engine control (SKYACTIV-D 2.2)

•  Two-step boost control has been adopted, realizing low emission, low fuel consumption, high torque, and high response.

―  Fuel injector (2pin type)

•  Compressor bypass solenoid valve adopted

•  Regulating solenoid valve adopted

•  Wastegate solenoid valve adopted

―  Fuel injector (6pin type)

•  Variable geometry turbocharger adopted

•  Regulating valve actuator adopted

•  Actuator of turbocharger with variable turbine geometry adopted

•  Intake stroke EGR using double exhaust valve actuation system (IDEVA) control has been adopted, realizing combustion stability at cold temperatures. (fuel injector (2pin type))

•  Glow control has been adopted to improve engine startability and diesel particulate filter regeneration performance.

•  An exhaust gas recirculation (EGR) system has been adopted for cleaner exhaust emissions and improved fuel efficiency.

•  i-stop control has been adopted for improved fuel efficiency, reduced exhaust gas emissions, and reduced idling noise.

•  SCR control has been adopted which purifies contaminants in the exhaust gas by utilizing chemical reactions. (with SCR system)

•  i-art (intelligent accuracy refinement technology) has been adopted for improved fuel injection precision. (fuel injector (6pin type))

Suspension

Front suspension

•  A fluid-filled type front lower arm bushing has been adopted.

•  Strut-type suspension adopted.

•  The cross-section on the center member of the front crossmember has been expanded and the longitudinal offset of the front lower arm installation position reduced to realize an optimized framework.

•  For the front / rear crossmembers, the welded flange has been eliminated (flange-less), the cross-section expanded and the connection rigidity of the welded parts improved to achieve both rigidity and light weight.

•  By adopting a 6-point rigid mount-type front crossmember, the force generated from the tires is transmitted directly, and an agile vehicle response in low-to-mid speed range has been realized.

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Rear suspension

•  Multi-link rear suspension adopted.

•  The longitudinal span of the rear crossmember was extended and the longitudinal offset of the rear lateral link attachment position was reduced.

•  For the front /rear crossmembers, the welded flange has been eliminated (flange-less), the cross-section expanded and the connection rigidity of the welded parts improved to achieve both rigidity and light weight.

2WD

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4WD

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Driveline/Axle

•  Unit-design, double angular ball bearings with low rotational resistance have been adopted for the front and rear axles.

•  Unit bearings that require no preload adjustment have been adopted for the front and rear wheels.

•  The following parts have been adopted to reduce vibration and noise:

―  Bell-shaped constant velocity joint has been adopted for the wheel-side joint of the front drive shaft.

―  A tripod-shaped constant velocity joint has been adopted for the differential-side joint of the front drive shaft.

―  For 4WD vehicles, bell-shaped constant velocity joint has been adopted for the wheel-side joint of the rear drive shaft.

―  For 4WD vehicles, a tripod-shaped joint has been adopted for the differential-side constant velocity joint.

―  For 4WD vehicles, 2-part, 1-joint type propeller shaft with middle shaft bearing has been adopted.

•  For 4WD vehicles, the following parts have been adopted to improve off-road mobility and handling stability:

―  Electronic 4WD control system which automatically and optimally controls drive torque distribution for the front and rear wheels.

―  Rear differential which integrates the coupling component to reduce size and weight.

•  Ball bearings/tandem ball bearings with low rolling resistance have been adopted for the inside of the rear differential and transfer.

Brakes

Conventional brake system

•  The following systems, mechanisms, and functions have been adopted to enhance safety.

―  Intrusion-minimizing brake pedal

―  Antilock brake system (ABS)

―  Electronic brake force distribution (EBD) control

―  Traction control system (TCS)

―  Dynamic stability control (DSC)

―  Roll stability control

―  Electronic control brake assist

―  Vehicle roll prevention function

―  Hill launch assist (HLA)

―  Secondary collision reduction

―  AUTOHOLD

Vehicle front side (L.H.D.)

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Vehicle front side (R.H.D.)

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Vehicle rear side

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Dynamic stability control (DSC)

•  Electrical brake assist control has been adopted, improving safety.

•  The DSC HU/CM, integrating both the Hydraulic Unit (HU) and Control Module (CM), has been adopted, resulting in a size and weight reduction.

•  An enhanced malfunction diagnosis system, used with the Mazda Modular Diagnostic System (M-MDS), improving serviceability.

•  Serviceability improved by the automatic configuration function.

•  Receives the lateral-G, longitudinal-G, and yaw rate signals between the Sophisticated Air bag Sensor (SAS) control module and the DSC HU/CM via Controller Area Network (CAN) lines instead of the conventional combined sensor.

•  The vehicle roll prevention function, hill launch assist (HLA), roll over mitigation (ROM), and secondary collision reduction^* have been adopted, improving safety.

Vehicle front side (L.H.D.)

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Vehicle front side (R.H.D.)

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Vehicle rear side

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Transmission/Transaxle

C66M(X)-R

•  For SKYACTIV-G 2.0, six-speed C66M(X)-R manual transaxle has been adopted.

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D66M(X)-R

•  For SKYACTIV-D 2.2, six-speed D66M(X)-R manual transaxle has been adopted.

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FW6A(X)-EL

•  For SKYACTIV-G 2.0 and SKYACTIV-G 2.5, six-speed FW6A(X)-EL automatic transaxle has been adopted.

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GW6A(X)-EL

•  For SKYACTIV-G 2.5T and SKYACTIV-D 2.2, six-speed GW6A(X)-EL automatic transaxle has been adopted.

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Steering

•  A column-assist type Electric Power Steering (EPS) has been adopted.

•  The quick steering gear ratio (15.5) enhances the vehicle responsiveness to the driver's steering operations.

•  A steering column with tilt/telescoping mechanism has been adopted, allowing fine adjustment of the driving posture.

•  A steering column and shaft with a shock-absorbing mechanism has been adopted.

•  The EPS Control Module (CM) has been integrated with the EPS motor, resulting in a size and weight reduction.

•  Serviceability has been enhanced by enabling high-function malfunction diagnosis using the Mazda Modular Diagnostic System (M-MDS).

L.H.D.

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R.H.D.

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Safety

•  The following have been adopted to improve safety

―  360° view monitor

―  Advanced smart city brake support (Advanced SCBS)

―  Smart city brake support [Forward/Reverse] (SCBS F/R)

―  Smart city brake support [Forward] (SCBS F)

―  Smart city brake support [Reverse] (SCBS R)

―  Adaptive front lighting system (AFS)

―  Adaptive LED headlights (ALH)

―  Traffic sign recognition system (TSR)

―  High beam control (HBC) system

―  Smart brake support (SBS)

―  Distance recognition support system (DRSS)

―  Lane departure warning system (LDWS)

―  Driver attention alert

―  Blind spot monitoring system (BSM)

―  Lane-keep assist system

―  Mazda radar cruise control (MRCC)

―  Mazda radar cruise control with stop & go function (MRCC with stop & go function) system

―  Cruise control system

―  Electronic control brake assist

―  Electronic brake force distribution (EBD) control

―  Intrusion-minimizing brake pedal

―  Tire pressure monitoring system (TPMS)

―  ABS control

―  TCS control

―  DSC control

―  Vehicle roll prevention function

―  Hill launch assist (HLA)

―  Roll over mitigation

―  Secondary collision reduction

―  Steering shaft with energy adsorbing mechanism

―  Curtain air bags

―  Side air bags

―  Pre-tensioner and load limiter mechanisms

―  Seat belt warning alarm

―  ISOFIX and top tether anchors

―  The multi-load path

―  Triple H-shaped structure

―  Straight structure

―  Ring structure

―  Auto light system

―  High-mount brake light

―  Emergency signal system (ESS)

―  Active driving display

―  Immobilizer system

―  Auto reverse pinch protection function

―  Auto-dimming mirror

Driver's support

•  The following have been adopted to improve convenience and comfort

―  Natural sound smoother

―  Drive selection system

―  Electric parking brake (EPB)

―  AUTOHOLD

―  Electric Power Steering (EPS)

―  Steering column with tilt/telescoping mechanism

―  Heated steering wheel

―  Full-auto air conditioner

―  Power liftgate (PLG) system

―  UV protection glass

―  Heated outer mirrors

―  Windshield wiper de-icer

―  Outer mirror automatic folding

―  Rear window defogger

―  Power seat system

―  Seat warmer system

―  Seat ventilation system

―  Position memory system

―  Advanced keyless entry system

―  Keyless entry system

―  Theft-deterrent system

―  Push button start system

―  Electric sunroof

―  Running light system

―  Headlight auto leveling system

―  Auto wiper system

―  Headlight cleaner system

―  Center display

―  Commander switch

―  Multi-information display

―  Park assist system

―  Parking sensor system

―  Active air shutter system