2016 – MX-5 – Engine

OIL JET VALVE [SKYACTIV-G 2.0]

Purpose, Function

• The oil jet valve injects engine oil on the back of the piston to cool the piston.

Construction

• The oil jet valve is located inside the cylinder block.

  

• The check ball and spring are built into the oil jet valve.

  

Operation

1. When the oil pressure applied to the check ball exceeds the spring force, the check ball and spring are pressed down.

2. The oil passage is opened to the nozzle and engine oil is injected to the back side of the piston.

3. When the oil pressure applied to the check ball is lower than the spring force, the spring presses up the check ball.

4. The oil passage to the nozzle is closed and the injection of engine oil stops.

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