Mazda CX-5 Service & Repair Manual: Connecting Rod, Connecting Rod Bearing
Purpose, Function
Connecting rod
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The connecting rod transmits the reciprocating movement of the piston to the crankshaft by engaging the piston pin and crank pin.
Connecting rod bearing
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The connecting rod bearing forms an oil film on the outer surface of the crank pin to prevent wear due to sliding.
Construction
Connecting rod
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The connecting rod is installed between the piston pin and crank pin.
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High-strength, forged carbon steel has been adopted for weight reduction.
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A cracking method*1 for breaking off and separating the connecting rod from the connecting rod cap has been adopted for improved accuracy.
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Weight has been reduced by optimizing the shape from the I shaft to the large end.
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Reciprocating inertial weight, including the piston, has been reduced with the use of a full-float type for the connection with the piston and further tapering of the small end shape.
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With the adoption of the plastic region tightening*2 method for the connecting rod bolt, the stability of the axial force has been improved.
*2 Plastic region tightening is a method of controlling the tightening using the rotation angle of a bolt. By tightening to the region (plastic tightening region) in which bolt deformation does not become irreversible, variation in axial force is suppressed.
Connecting rod bearing
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The connecting rod bearing is installed on the outer surface of the crank pin.
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The upper and lower connecting rod bearing are made of aluminum alloy.
Piston Assembly
...
Piston, Piston Ring, Piston Pin
Purpose, Function
Piston
The piston in the cylinder of the cylinder block moves reciprocally by the
pressure received when the air-fuel mixture combusts.
Piston ring
The piston ...
Other materials:
Headlight Auto Leveling System
Outline
Automatically adjusts the headlight optical axis in response to changes in
load and passenger conditions to prevent blinding of oncoming vehicles from
headlight glare and to assure a range of visibility.
The AFS control module performs headlight auto leveling system fail ...
Seat Weight Sensor Inspection [Two Step Deployment Control System]
CAUTION:
If any of the following work is performed, perform the seat weight sensor
inspection using the M-MDS.
Removal of the passenger-side seat
Loosening and retightening of passenger’s seat fixing bolts
Or, the vehicle is involved in a collision
...
Automatic Transaxle Shift Mechanism [Fw6 A EL, Fw6 Ax EL]
Outline
A sport AT-type shift mechanism has been adopted for all models.
An electric shift-lock system has been adopted to prevent driver mis-operation.
A manual shift-lock release system has been adopted to ensure emergency bypass
if shifting operations cannot be performed ...
