What makes vtec so good

Based on speed, load, and engine RPM, the computer switches between the efficient cam and the high-performance cam. A solenoid is actuated that engages the rocker arms on the high-performance cam. At that point the valves open and close according to the high-lift profile, opening the valves further and for a longer time.

This allows more air and fuel to enter and burn, creating stronger torque and horsepower. In any engine, valve timing, duration and lift that optimize performance at low speeds are very different than high RPM needs. The Integra Type R only available in the Japanese market produced an incredible horsepower in a 1. Without i-VTEC technology, you would have a problem. In some cases, it can even make it harder to start the engine. Now, what the i-VTEC technology does is that Honda engines work effectively by having multiple camshafts.

As you can see, Honda i-VTEC technology provides fuel consumption economy without sacrificing performance. If you have a Honda, the best way to maintain your vehicle as good as new is to bring your car to Honda Service Centre in Penang. This way you can ensure your car is in good hands. Get an accurate diagnosis at your nearest authorized Honda Service Centre. If you are interested in knowing about the reasons why your check engine light is on , you can check the guide we created.

In an engine, the camshaft is a long rod that normally sits above the cylinder and the piston, and that operates the valves which plug up both an intake channel and an exhaust channel.

Your spark plug discharges, allowing the fuel inside to combust, and another rotation opens the exhaust channel as the intake channel is closed, pushing out the exhaust gasses.

During this process, the pistons move up and down in the cylinders. Quite a few variables control how an engine produces the power needed to make a car move. The process of opening and closing the valves that we just described works well at low revolutions per minute rpm , but the valves open and close so quickly as the engine builds up speed that performance ultimately starts suffering. Valve timing that augments torque at one rpm range inevitably diminishes output elsewhere.

Consider, for example, valve overlap—when the intake and exhaust valves are held slightly open for a short period at the beginning of the intake stroke. Overlap allows spent gases exiting the cylinder to help draw fresh air from the intake manifold to fill the void created by the descending piston.

Overlap works beautifully at high rpm. Unfortunately, at low rpm, the random mixing of exhaust gas and fresh air yields rough running and a rowdy idle.

Or can you? The first VTEC engine sold in Japan in the Honda Integra XSi provided two distinct cam profiles for every valve, allowing the engine to perform superbly well at both low and high rpm. Engineers around the globe hardly noticed, but the breakthrough left an indelible impression on Honda fans. Founder Soichiro Honda was late to the transportation game. After a B bomber leveled one of his piston-ring factories during World War II, an earthquake destroyed his second plant.

Out of desperation, Honda built and sold motorized bicycles powered by surplus generator engines. He established the Honda Motor Company in Takeo Fujisawa joined the company in as managing director. Team Honda began competing in European Grand Prix motorcycle racing in Seven years later, it swept the field with five championships in classes from 50 cc to cc. The degree V sitting behind Ginther was a thing of intricate beauty, with a dozen vertical intake trumpets, 48 valves, and tiny pistons oscillating through 1.

Main and rod bearings were fitted with needle rollers to minimize friction. An elaborate aluminum casting contained the cylinder block and a six-speed transaxle. Power peaked at 12, rpm with horses, and this 1.