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:

Up Switch [Fw6 A EL, Fw6 Ax EL]
Purpose/Function The up switch detects the shift up operation of the selector lever. The up switch signal is sent to the TCM via CAN and is used for manual shift control and engine-transaxle integration control. Construction The up switch is installed to the selector l ...

Speaker Grille Removal/Installation
Center Speaker Grille 1. Insert a tape-wrapped flathead screwdriver into shown in the figure and remove hooks A in the direction of arrow (1). 2. Take the shaded area shown in the figure, and remove the center speaker grille in the direction of arrow (2) while detaching hooks B. 3. ...

Side Turn Light
Purpose The side turn lights are used to signal vehicles/people at the side of the vehicle that the vehicle is going to make a right or left turn. Function The side turn lights flash according to the operation of the turn or the hazard switch. Construction Side ...