What does VVT mean behind a modern car?

Variable Valve Timing (VVT) is a technology used in automotive piston engines. VVT technology adjusts the overlap time and timing (some or all of it) in the engine's intake and exhaust systems, reducing fuel consumption and increasing efficiency.

In 1991, the University of Clemson in the United States invented a more advanced intake and exhaust valve continuously variable valve timing and obtained a patent.

American Society of Mechanical Engineers, Clemson Camshaft Boosts Auto Fuel Economy, Mechanical Engineering-CIME (1991-12-01)), after which BMW Automotive became a close partner with the university's Department of Mechanical Engineering. In 1995, Honda Motors, a leading partner of the British Rover Automobile Group, invented another continuously variable valve timing technology, VVC.

Extended information: Toyota's VVT-i system continuously adjusts valve timing, but not valve lift. It works by:

When the engine is converted from low speed to high speed, the electronic computer automatically presses the oil to the small turbine in the intake camshaft to drive the gear, so that under the action of pressure, the small turbine rotates at a certain angle relative to the gear housing, so that the camshaft rotates forward or backward in the range of 60 degrees, so as to change the moment of opening the intake valve and achieve the purpose of continuously adjusting the valve timing.

vvtvariable valve timing

Variable valve timing system. This system is ubiquitous in today's high-performance engines. The system is equipped with a control and actuation system that adjusts the phase of the engine cam or valve spawn to optimize the engine valve process.

Engine variable valve timing technology (VVT, variable valve timing) is one of the new technologies that have been gradually applied to modern cars in recent years, the engine adopts variable valve timing technology to improve the intake charge, so that the charge coefficient increases, and the torque and power of the engine can be further improved.

The engine of the series, and there are cars that are marked on the side!

VVT (VariableValvetiming) variable valve timing system. The system adjusts the phase of the engine cam through the control and actuation system, so that the opening and closing time of the valve changes with the change of engine speed, so as to improve the charging efficiency and increase the engine power.

Principle: The principle of engine variable valve timing technology (VVT, variablevalvetiming) is to adjust the amount of intake (exhaust) leakage, and the opening and closing time and angle of the valve according to the operation of the engine, so that the amount of incoming air can reach the best and improve the combustion efficiency. The advantage is that it is fuel-efficient, and the power-to-rise ratio is large, while the disadvantage is that the torque in the middle section is insufficient.

VVT Technology:

The VVT of Korean cars is based on Toyota's VVT-i and Honda's VTEC technology in Japan, but compared with Toyota's VVT-i variable timing valve technology, VVT is only variable valve technology and lacks timing technology, so the VVT engine is indeed more fuel-efficient than the general engine, but it is not as fuel-efficient as the Toyota and Honda cars of Japanese cars. BMW has already adopted this technology in previous generations of engines, such as Honda's VTEC, i-VTEC, and current engines; Toyota's VVT-i; Nissan's CVVT; Mitsubishi's Mivec; Suzuki's VVT; modern VVT; Kia's CVVT; JAC's VVT; The Great Wall's VVT and other products are also gradually being used. In general, it is actually a technology, with a different name.

VV means "variable valve timing" in Chinese. The technical principle of engine variable valve timing is to adjust the intake (discharge) volume, valve opening and closing time and angle according to the operation of the engine. Optimize the air intake and improve the combustion efficiency.

Variable Valve Timing (VVT) is a technology used in automotive piston engines. The system adjusts the phase of the engine cam through a control and actuation system that allows the valve opening and closing times to vary with the engine hall speed, thereby improving inflation efficiency and increasing engine power.

The principle of Variable Valve Timing (VVT) technology is to adjust the intake (discharge) volume, valve opening and closing time and angle according to the operating conditions of the engine, so that the intake air intake volume reaches the best value, so as to achieve the best combustion efficiency and improve fuel economy. Excellent early skin point with fuel economy and high power lift ratio; The disadvantage is the lack of speed and torque in the middle section.

The VV is controlled by an electronic control unit (ECU). The system mainly controls the intake valve camshaft and has a small tail "i", which is the code name for "intellingence" in English. These are the literal meanings of "vvt-i".

Millions of car purchase subsidies.

VVT is a variable valve timing system. The technology used in the VVT engine is continuously variable valve timing technology, which can continuously adjust the valve opening and closing time and air intake volume of the engine, so as to increase the engine power and optimize the torque curve, and the biggest benefit is to improve the power of the engine, reduce fuel consumption.

Engine Variable Valve Timing Technology VVT, (VariableValvetiming) principle is to adjust the amount of intake and exhaust air, valve opening and closing time, and angle according to the operation of the engine. The amount of incoming air is optimal, and the combustion efficiency is improved. The advantage is that it is fuel-efficient and has a large liter ratio.

The disadvantage is that the torque in the middle section is insufficient.

VVT technology has a history of more than 30 years, and in 1980, Alfaromeo used VVT technology for the first time; Honda, in 1989, used VVT technology with variable valve lift capability for the first time; BMW, in 2001, replaced the conventional throttle for the first time with VVT technology.

VVT Chinese means "variable valve timing", due to the use of electronic control unit (ECU) control, the system mainly controls the intake valve camshaft, and a small tail "I", which is the code name of the English "Intellingence" (intelligence). That's the literal meaning of "vvt i".

Photo by Liao Wei of Pacific Automobile Network).