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 Accessory Socket Removal/Installation
1. Disconnect the negative battery cable.. 2. Insert a tape-wrapped flathead screwdriver into the service hole in the position shown in the figure. 3. Move the flathead screwdriver in the direction of the arrow (1) shown in the figure, pull out the service hole cover, and detach the serv ...

Door Lock Switch Removal/Installation
Driver's Side NOTE: The driver's side door lock switch cannot be removed as a single unit because it is built into the power window main switch. If the driver's side door lock switch is replaced, replace the power window main switch.. Passenger's Side 1. Disconn ...

Purge Control
Outline An appropriate amount of evaporative gas is fed into the intake manifold by the purge solenoid valve operation according to the engine operation conditions. This ensures driveability and prevents release of evaporative gas into the atmosphere. The PCM drives the purge so ...