How many throttles does vtec engine have per cylinder?

The VTEC engine has four valves per cylinder: 1. VTEC engine has four valves per cylinder (two in two rows), camshaft and rocker arm. It is the same as the ordinary engine, but different from the ordinary engine in the number and control mode of cams and rocker arms.

2. Compared with ordinary engines, VTEC engines are different in the number and control methods of cams and rocker arms. It has two different valve-driven cams, low-speed and high-speed, which can be automatically switched through the adjustment of the electronic control system.

3. Through the VTEC system device, the engine can automatically change the opening time and lift of the valve according to the driving conditions, and change the effect of intake and exhaust, thus reducing fuel consumption and unnecessary emissions to a certain extent;

4. It can adjust the valve timing and valve lift appropriately according to the changes of engine speed, load, water temperature and other operating parameters, so that the engine can achieve the highest efficiency at high and low speeds.

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