At present, there are a large number of engines equipped with variable valve timing systems, including a variety of self-owned brands that we are familiar with, although there is still a gap between the technical level of various manufacturers and models. However, as a whole, the variable valve timing system has become a more popular technology and it seems to be taken for granted.
But we know the so-called variable valve timing technology, its function is mainly to change the time of engine valve opening and closing, in order to achieve a more reasonable control of the amount of air required for the corresponding engine speed, the main purpose is to reduce fuel consumption and improve economy. . The actual dynamic performance of the engine is related to the amount of oxygen that enters the cylinder per unit time. The variable valve timing system cannot effectively change this, so it does not help the power boost.
Since the variable valve timing system is powerless, it is now the turn of the main variable valve lift system in this article. Compared with variable valve timing, the valve lift system is still relatively rare, especially the continuously variable valve lift technology is only the top secret technology in the hands of several large manufacturers, so the equipment we can buy can be changed. There are not many models of the valve lift system. Let's take a look at which models are available.
Read the instructions before:
This article will mainly introduce the variable valve lift systems of the three major manufacturers. However, due to their different technical differences and different brand levels, the models of the models involved in this article are quite different. Therefore, we only do technical analysis and there is no comparison between the models. Please pay attention to netizens.
Honda variable valve lift technology: VTEC, i-VTEC
Application model: all domestic Honda and Acura models
"The engines of many models of Honda and Acura are equipped with VTEC or i-VTEC systems."
Honda is the first manufacturer to apply variable valve lift technology to on-board engines, and unlike other manufacturers who use variable valve timing and then add variable valve lift technology, Honda engineers at the beginning of the R&D project. The two technologies are synchronized. The simple structure and ingenious design are the characteristics of Honda's variable valve lift mechanism. The specific working methods will be introduced below.
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