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:

Rear Wiper Motor Removal/Installation
1. Disconnect the negative battery cable.. 2. Remove the following parts: a. Rear wiper arm and blade. b. Liftgate upper trim. c. Liftgate side trim. d. Liftgate recess. e. Liftgate lower trim. 3. Remove the rear wiper motor connector. 4. Remove bolts shown in the figure. 5 ...

Front Shock Absorber Disposal
WARNING: Whenever drilling into a front shock absorber, wear protective eye wear. The gas in the front shock absorber is pressurized, and could spray metal chips into the eyes and face when drilling. 1. Place the shock absorber on a level surface or with the piston pointing d ...

Hood
Purpose/Function The hood is constructed with a large space between the front end of the hood and the engine to absorb an impact. Construction The hood stiffener positioned at the front end of the hood is shaped so that it collapses easily during an impact. In addition, the ...