What is the basic function of a 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. It is increasingly being used in combination with variable valve lift systems.
Why VVT improve engine power?
Benefits of VVT One benefit is an increase in maximum engine speed (and therefore more peak power) – as much as a 25% increase. Low speed torque is also increased, providing better handling and drivability.
Can a VVT solenoid cause low oil pressure?
Most modern VVT systems utilize engine oil (hydraulic) pressure and some type of an electronic solenoid to initiate changes in valve timing, lift, and/or duration. One of the most common problems found when diagnosing a VVT system malfunction is low oil pressure or low engine oil level.
What is the advantage of VVT?
VVT-i advantages include increased torque and output, better fuel economy, and reduction of nitrogen oxide (NOx) and hydrocarbon emissions. The simple structure of the VVT-i makes it extremely reliable and easy to adapt for existing engine designs.
What are advantages of VVT?
Higher RPM – The main advantage of having a variable valve timing technology is the increase it will provide in your engine’s revolutions per minute. Lower Carbon Emissions – Any time your engine provides a better fuel economy, you will see reduced carbon emissions too.
Can I drive with a bad VVT?
Can You Drive with a Bad VVT Solenoid? Even though you may technically be able to continue driving with a bad VVT solenoid, the issue can cause damage to additional parts, such as the VVT actuator. So, you should address the issue as soon as possible.
How do I know if my VVT is bad?
Common signs include a rough engine idle, the Check Engine Light coming on, and the engine stumbling when climbing hills or under load.
What does VVTi stand for in automotive category?
What is VVTi? VVT-i, or Variable Valve Timing with intelligence, is an automobile variable valve timing technology developed by Toyota.VVT-i, introduced in 1996. It varies the timing of the intake valves by adjusting the relationship between the camshaft drive (belt, scissor-gear or chain) and intake camshaft.
What can happen when a VVT system fails?
Interference is often associated with failed timing belts, tensioners, and water pumps, but VVT actuators may also fail with catastrophic consequences. When a VVT system code is exhibited, it is critical that the problem is addressed and rectified as quickly as possible.
What does variable valve timing with Inelligence ( VVT-i ) do?
Variable valve timing with inelligence (VVT-i)optimizes engine efficency by constantly retarding or advancing intake valve timing depends on conditions and engine speeds. The result is exceptional low-end torque to get you off the line ,mid–rang punch for passing situations and clean-burning efficiency throughout the rev range.
What happens when a VVT code is stored?
Understand that any stored VVT system code may result in deactivation of the entire VVT system. If this is the case, an immediate and noticeable decrease in engine performance and fuel efficiency will likely take place.