Mazda CX-5 Service & Repair Manual: Miller Cycle Engine

Mazda CX-5 Service & Repair Manual / Engine / General / Miller Cycle Engine

Outline

The Miller cycle engine is a high-efficiency engine which achieves high fuel economy performance by obtaining a high-expansion ratio.
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:

Front Door Latch Switch
Purpose, Function Switches on/off in conjunction with the latch lever rotation, and detects the front door open/closed condition by the voltage which is changed by the rear body control module (RBCM). Construction The switch is turned on/off by the rotation of the latch lev ...

Cowl Upper Plate Removal [Panel Replacement]
Symbol Mark Removal Procedure 1. Drill the 9 locations indicated by (A) shown in the figure. 2. Drill the 2 locations by (B) from the front wheel housing side shown in the figure. 3. Drill the 2 locations indicated by (C) from the inside shown in the figure. 4. Remove the cowl upp ...

Fuel Injector
Purpose, Function Promotes atomization of fuel by injecting it from the multiple holes. Injects fuel according to the control signal from the PCM. Construction The fuel injector is installed to the cylinder head. The fuel injector has multiple injection hole ...