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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
...

Other materials:

Blower Unit
Purpose The blower unit switches between fresh air and recirculated air (FRESH/REC) and sends airflow into the cabin. Function Air is blown by the blower motor in the blower unit. The blower unit switches the air intake port to FRESH or REC based on the position of ...

Bumper Slider Removal/Installation
Front Bumper Slider 1. Disconnect the negative battery cable.. 2. Remove the seal board upper.. 3. Remove the front bumper.. 4. Remove bolts A. 5. Pull the front bumper slider in the direction of the arrow while detaching pins B and hook C. 6. Install in the reverse order of removal ...

Fuel Distributor [Skyactiv G 2.0]
Purpose, Function Distributes fuel pumped from the high pressure fuel pump to each fuel injector. Construction The fuel distributor is installed to the cylinder head. The fuel distributor is integrated with the fuel pressure sensor. ...

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