Mazda CX-5 Service & Repair Manual: Miller Cycle Engine
Outline
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The Miller cycle engine is a high-efficiency engine which achieves high fuel economy performance by obtaining a high-expansion ratio.
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The Miller cycle engine achieves a high-expansion ratio without increasing its effective compression ratio by retarding the intake air valve close timing.
Operation
1. Intake air is introduced into the cylinder.
2. The intake valve is kept open after the intake stroke is finished to force the air in the cylinder to flow back to the intake pipe.
3. The compression stroke starts from the position in which the intake valve is closed (small compression).
4. The air-fuel mixture is combusted and the piston is pushed down to BDC (large expansion).
Mechanical
Outline
The sliding resistance*1 has been reduced by:
the adoption of a rocker arm (built into needle roller bearing)
reducing load on the valve spring
narrow ...
Non Return Valve Inspection
WARNING:
Fuel is very flammable liquid. If fuel spills or leaks from the pressurized
fuel system, it will cause serious injury or death and facility breakage. Fuel
can also irritate skin ...
Other materials:
Map Light Inspection
Front Map Light
1. Disconnect the negative battery cable..
2. Remove the front map light..
3. Verify that the continuity between the front map light terminals is as indicated
in the table.
If not as indicated in the table, replace the front map light or front map
light bulb ...
Timing Chain, Chain Tensioner
Purpose, Function
Timing chain
The timing chain transmits the rotation force of the crankshaft to the camshaft
to perform the rotation timing of the crankshaft and camshaft.
Chain tensioner
The chain tensioner constantly maintains the timing chain tension and the
timing ch ...
Rear Seat Back Removal/Installation
CAUTION:
When removing or putting in the rear seat, contact with the surrounding areas
of the vehicle could cause scratches and damage. When removing or putting in
the rear seat, always use two or more persons to perform the work and be careful
not to scratch or damage the rear seat ...
