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:
Coupling Component Removal/Installation
WARNING:
When replacing the coupling component, read the special character string
before installing a new coupling component and write it to the AWD control module
after replacement. The special character string is indicated in the two locations
shown in the figure.
1. D ...
Map Light Bulb Removal/Installation
Front Map Light
1. Disconnect the negative battery cable..
2. To prevent scratches or damage, affix protective tape to the position shown
in the figure.
CAUTION:
If a flathead screwdriver is inserted into the gap between the front map
light and lens, the front map light could inter ...
Controller Area Network (Can) System
Outline
A CAN system has been adopted which can send and receive multiple signals
over a single communication path from related modules.
System wiring diagram
HS-CAN
MS-CAN
Structure
The CAN system consists of CAN system-related modules built into the CPU
...
