What is VVT system?

In internal combustion engines, variable valve timing (VVT) is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions. Increasingly strict emissions regulations are causing many automotive manufacturers to use VVT systems.

What does a VVT sensor do?

The variable valve timing solenoid is a component of the variable valve timing system that manages the oil flow depending on the engine speed and load. A VVT solenoid in good working condition improves performance and fuel efficiency.

What is cam changing VVT?

Cam Changing Other VVT systems change the shape of their camshaft lobes, not just the camshaft phase angle relative to the crankshaft. Changing the cam profile not only affects valve lift (how far the valve opens), but also valve duration (how long the valve stays open).

How does VVT sprocket work?

The (VVT) variable valve timing system, uses engine oil pressure, to change the position of the intake camshaft. As a result, optimizing intake valve timing for operating conditions. Adjustments in the overlap time, between the exhaust valve closing and intake valve opening; results in improved engine efficiency.

How does Volvo VVT work?

The VVT varies the timing of opening and closing of valves for multiple engine speeds. At high speed, the Inlet valves open quite earlier so that more air-fuel mixture or ‘charge’ enters the cylinders. This helps to increase engine’s breathing which also improves its ‘volumetric efficiency’ to a large extent.

How much does a VVT cost?

The average VVT solenoid replacement cost is between $100 and $500. You can expect labor costs of $50-300 depending on the car model, and the part itself costs between $50-300. With VVT solenoids, there is a large price variance depending on the car you have.

What happens when VVT fails?

A malfunctioning VVT solenoid can prevent the valve timing from advancing or retarding as needed. As a result, the engine may exhibit performance problems, such as rough running and poor acceleration.

How long does a VVT last?

Just like other sensors and switches on your car, the VVT switch is designed to be a lifetime part. The heat of the engine is what usually causes repair issues with this part of the car.

How much power does VVT add?

“With variable valve timing, we typically see a 5-10 percent improvement in output at the ends of the torque and power curves,” Godbold says.