What is the unique technology i-VTEC of Honda Civic engine?

I-VTEC is a patent of Honda, not only the Civic, but also many models of Honda have adopted this technology. The full name of i-VTEC is variable valve timing and lift electronic control system. This technology simply controls the closing of the engine valve. The computer will judge the state of the car according to various parameters of the car, and then control the opening and closing and lift of the valve. When the car needs more power, the engine will work in the whole cylinder, and when the city road is flat, the engine will close some cylinders. Of course, these are all controlled by the VTEC system.

The advantage of this technology is that it can save fuel, which can save 20% compared with the same displacement engine without this technology. Of course, fuel economy is a welfare developed later. 1988, Honda introduced VTEC technology, which is the first automobile manufacturer in the world. Later, many Japanese brands also introduced their own technologies, all based on VTEC. In addition to saving fuel, VTEC can also improve the power of the engine, which was comparable to the racing engine at that time. In the case of small displacement at that time, Honda was also the first manufacturer to break through 100 horsepower.

Later, Honda trained a super classic B 16B red-haired engine based on this technology. This engine was also used for Civic. How classic is it? 1.6L naturally aspirated engine has actually reached 185 horsepower, which is higher than many cars with displacement above 2.0L now. Up to now, no naturally aspirated engine of 1.6L has reached this level.