Mazda CX-5 Service & Repair Manual: Crankshaft, Main Bearing
Purpose, Function
-
The crankshaft converts the reciprocating movement of the piston to a rotational movement via the connecting rod.
-
The main bearing forms an oil film on the outer surface of the crankshaft journal to prevent wear due to sliding.
Construction
Crankshaft
-
The crankshaft is installed to the inside (crankcase) of the cylinder block.
-
The crankshaft has a key groove to match timing to the crankshaft pulley.
-
The crankshaft has the following parts shown in the figure.
-
The optimized shaft diameter ratio of the crankshaft journal and crank pin has reduced sliding resistance while maintaining rigidity.
-
The steel crankshaft has five bearings and eight counterweights for improved accuracy in the rotational balance.
-
The crankshaft journal and crank pin have been induction hardened* to bear high loads.
-
The crankshaft has an oil passage for supplying engine oil to the crankshaft journal and crank pin.
Main bearing
-
The main bearing is installed to the outer surface of the crankshaft journal.
-
The upper main bearing and lower main bearing are made of aluminum alloy.
-
The upper main bearing has an oil groove and oil hole.
-
Thrust force is suppressed by the thrust bearings on both sides of the No.3 journal.
Crankshaft Position (CKP) Sensor
Purpose/Function
Detects the crankshaft speed as basic information for mainly determining
the fuel injection timing and ignition timing.
Detects the crankshaft speed and inputs it to ...
Motor Mounts
...
Other materials:
Cruise Control System
Outline
Enables driving at a constant speed by setting the vehicle speed with the
cruise control switch instead of operating the accelerator pedal.
The PCM controls the throttle valve actuator to maintain the vehicle at a
constant speed.
Component and function
...
Audio Unit (Without Color LCD)
NOTE:
“iPod” is a registered trademark of Apple Inc. in the United States and other
countries.
Outline
The audio unit controls the CD, radio, exterior input devices (AUX/USB/iPod)
and the display.
Function
The display integrated into the audio unit display ...
Coupling Component Calibration Data Writing
1. Connect the M-MDS to the DLC-2.
2. After the vehicle is identified, select the following items from the toolbox
of the M-MDS.
Select “Chassis”.
3. Then, select items from the screen menu in the following order.
Select “4WD/AWD”.
Select “Coupling Calibra ...
