How Variable Valve Timing Works
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Lexus Champion
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Here's how the variable valve timing system works on your car:
Varying valve timing yields improvements in emissions, increases fuel economy and gains in power.
Here you can see the valve train - with the VVT actuator being the larger gear connected to the intake camshaft:
![How Variable Valve Timing Works-ohpz0sa.jpg](https://www.clublexus.com/forums/attachments/car-chat/488798d1683151580t-how-variable-valve-timing-works-ohpz0sa.jpg)
Here's a look underneath the engine head at the valves:
![How Variable Valve Timing Works-pofnopp.jpg](https://www.clublexus.com/forums/attachments/car-chat/488799d1683151580t-how-variable-valve-timing-works-pofnopp.jpg)
The VVT actuator is the heart of the system, using oil pressure built up inside chambers to rotate the output shaft relative to the input shaft, changing the phase angle:
![How Variable Valve Timing Works-0fkyrsf.jpg](https://www.clublexus.com/forums/attachments/car-chat/488800d1683151580t-how-variable-valve-timing-works-0fkyrsf.jpg)
See the small holes where oil travels into the chambers:
![How Variable Valve Timing Works-mesavds.jpg](https://www.clublexus.com/forums/attachments/car-chat/488801d1683151580t-how-variable-valve-timing-works-mesavds.jpg)
This is the solenoid the controls oil flow through the camshaft to actuate the timing gear in advance or retard:
![How Variable Valve Timing Works-rathrcu.jpg](https://www.clublexus.com/forums/attachments/car-chat/488802d1683151580t-how-variable-valve-timing-works-rathrcu.jpg)
Varying valve timing yields improvements in emissions, increases fuel economy and gains in power.
Here you can see the valve train - with the VVT actuator being the larger gear connected to the intake camshaft:
![How Variable Valve Timing Works-ohpz0sa.jpg](https://www.clublexus.com/forums/attachments/car-chat/488798d1683151580t-how-variable-valve-timing-works-ohpz0sa.jpg)
Here's a look underneath the engine head at the valves:
![How Variable Valve Timing Works-pofnopp.jpg](https://www.clublexus.com/forums/attachments/car-chat/488799d1683151580t-how-variable-valve-timing-works-pofnopp.jpg)
The VVT actuator is the heart of the system, using oil pressure built up inside chambers to rotate the output shaft relative to the input shaft, changing the phase angle:
![How Variable Valve Timing Works-0fkyrsf.jpg](https://www.clublexus.com/forums/attachments/car-chat/488800d1683151580t-how-variable-valve-timing-works-0fkyrsf.jpg)
See the small holes where oil travels into the chambers:
![How Variable Valve Timing Works-mesavds.jpg](https://www.clublexus.com/forums/attachments/car-chat/488801d1683151580t-how-variable-valve-timing-works-mesavds.jpg)
This is the solenoid the controls oil flow through the camshaft to actuate the timing gear in advance or retard:
![How Variable Valve Timing Works-rathrcu.jpg](https://www.clublexus.com/forums/attachments/car-chat/488802d1683151580t-how-variable-valve-timing-works-rathrcu.jpg)
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