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Mazda CX-5 Service & Repair Manual: Variable Valve Timing Mechanism

Mazda CX-5 Service & Repair Manual / Engine / General / Variable Valve Timing Mechanism

Outline

Structural View


Structure


Part name

Function

Hydraulic variable valve timing actuator

The hydraulic variable valve timing actuator operates according to the hydraulic pressure and changes the phases of the exhaust camshaft.

Electric variable valve timing actuator

The electric variable valve timing actuator changes the phases of the intake camshaft.

Electric variable valve timing motor/driver

Operates the electric variable valve timing actuator based on the signals from the PCM.

OCV

Operated by current (duty signal) from the PCM. Controls the hydraulic oil passages to the hydraulic variable valve timing actuator.

Intake camshaft position sensor

Sends the intake camshaft position signal to the PCM.

Exhaust camshaft position sensor

Sends the exhaust camshaft position signal to the PCM.

Crankshaft position sensor

Sends the crankshaft position signal to the PCM.


Operation

At engine start

Light/medium load range

* Energy loss which occurs from each type of resistance corresponding to intake and exhaust is called pumping loss.

High load range

Valve Mechanism
Outline A DOHC type valve system has been adopted and consists of four valves (two intake valves and two exhaust valves) per cylinder for a total of 16 valves operated by two camshafts. ...

Belts, Hoses, Pulleys
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Other materials:

Rear Window Wiper and Washer
The ignition must be switched ON. Rear WindowWiper Turn the wiper on by turning the rear wiper/washer switch. Rear WindowWasher To spray washer fluid, turn the rear wiper/ washer switch to the position. After the switch is released, the washer will stop. If the washer does not work, ins ...

Electric Variable Valve Timing Actuator, Hydraulic Variable Valve Timing Actuator Removal/Installation
WARNING: A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing. CAUTION: Do not disassemble the electric variable valve timing actuator and hydraulic variable valve timing actuator because they are precision units. If ...

Blower Unit Removal/Installation
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