Since the first time in 2008, the first time was first equipped, although all the way quot; seam supplement quot;, this is a small domestic displacement turbine. Pre-pressurized engine products have been served in the Chinese market for nearly 13 years. In fact, in the European version of the European version of the European version of the European version, the new 1.5T EVO engine has been replaced to replace we are familiar with 1.4T. But in the domestic market, even if the eighth generation golf is listed, this kind of new motivation is still not equipped.
Dynamic fine-tuning, the provincial oil is main
The new 1.5T EVO engine still uses the EA211 code, so there are some 1.4T shadows on the design basis. For example, the new engine must have maintained the old 1.4T cylinder block and the cylinder spacing, but increased to 85.9mm on the piston stroke, so the displacement is also increased from 1.4L to 1.5L.
From the paper data, the new 1.5T EVO engine (160 ps / 250 nm) compares the currently equipped 1.4T power (150 ps / 250 nm), and the power is only increased by 10 ps, and the torque is consistent. Of course, the 250 nm torque level is fully considering the carrying capacity of the Volkswagen DQ200 dry double clutch. It is necessary to know that this is a driving force in 5 years ago. If comparison is currently equipped with Honda Second Generation 1.5T engine (194PS / 260NM), new motivation can say no advantage in performance.
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Of course, performance parameters are definitely not the only judgment standard that determines the quality of the engine. The main thinking of new engines is placed in increasing efficiency and reduces fuel consumption. After all, in the quot; emissions gate quot; after the event, the demand for Volkswagen’s energy saving is obviously greater than performance. And the European market that is extremely strive in the standard of emissions, the public has to make a foothold in efficiency. According to the official data, the new EA211 1.5T EVO series engine will have a hundred kilometers of fuel consumption than the original 1.4T. Then let’s take a look at which technologies it use.
High-voltage direct injection
First 350bar fuel direct injection technology, whether contrast to $ 200 bar or lateral contrast Other brands, the new EA211 1.5T EVO engine can bring considerable fuel atomization effect, achieving more sufficient fuel and air mixing effect. High-voltage direct injection is also a traditional internal combustion engine to reduce fuel consumption and reduce pollutant emissions.
The variable cylinder is finally coming
The active can be changed, which is not a new technology. This is not to say. Other brands, but the overseas version of the public 1.4T engine itself is equipped with this technology, just domestic quot; optimized quot; The technology is mainly in the middle of the second, third cylinder in the middle, and the sliding cam is added to the exhaust system, so that the engine takes the initiative to close the two valves, the exhaust doors, and let them The fuel injection system and spark plug stop working.
Electro-controlled cooling VS mechanical cooling
In the cooling system, the public and Honda have the same work. Honda second-generation 1.5T engine increases the separator inside the cylinder water jacket, utilizes thermal expansion, allows the coolant to more flowing to a high temperature site above the combustion chamber, and enhances the performance of the engine while inhibiting the knock. And the mounting of the cooling separator reduces the coolant in the cylinder water jacket to improve the heating efficiency of the engine. Faster enters the ideal working temperature, which is the core improvement part of Honda 1.5T to solve the problem of increased problems in the first generation.
In the public, the new 1.5T EVO engine is also committed to making the engine into the working state, different from the physical structure of Honda. The public is a cooling technique for controlling the control unit. The coolant of the cylinder and cylinder head water jacket is controlled by the ECU. The effect is the same, in the pursuit of better thermal efficiency, can also improve performance and suppress the knock.
New coating high power exclusive
On the high power version 1.5T EVO engine, the public also uses the APS plasma coating. The technology has been used in Audi, Porsche, Mercedes, BMW and other brands. It is mainly to process the inner wall of the engine cylinder through plasma spraying techniques such that the cylinder is more resistant, smooth, lowered, and improves fuel economy during operation. Of course, such new technologies are only used on high power version, is it also quot; not thick road quot; Don’t worry, the low power version also has its own exclusive technology.
Low power unique double cycle + variable turbine 
Low power version 1.5T EVO engine maximum power is 131 ps, the largest Torque 200 nm. If the high-power version is powered, the low power version is very completely moving toward the purpose of energy saving and emission reduction. First it uses a dual cycle system, that is, traditional Otto cycles, taking into account more efficient Miller cycles. The high expansion ratio of a small amount of air is achieved by delaying the opening time of the intake air. Make this low power version, the maximum theoretical thermal efficiency is 37.5 percentage, this is almost one line with the 38 percentage of Honda 1.5T.
Another low-power version unique technology is the application of variable cross section turbine, and we are not strange, and start Mainly used on diesel engines. The technology mainly achieves high speed response under low speed, reducing turbocyst, while taking into account the explosive force of the high rotation speed by adjusting the angle of the turbocharger blade. This is also made up for the lack of torque at the low speed of the Miller. According to official data, its response speed is increased by 35% compared to 1.4T, from 1400 to the maximum torque of 200 nm.
On the tempoine technique, Honda 1.5T is the response speed of the low inertia turbine to increase the response speed of the turbocharger, but the angle of the blade It does not change with working conditions. Therefore, in order to further enhance the effect of the turbine, Honda also uses 4-2 exhaust design, so that the exhaust gas of the 1, 4 cylinders and the 2, 4 cylinders is integrated, avoiding mutual exhaust interference, and improving exhaustivity. At the same time, the exhaust stroke is shortened by integrating the exhaust in the cylinder head, and the driving force for the turbine is improved.
Summary:
Volkswagen 1.5T EVO can be said to be the perfect and upgrade of the 1.4T engine, especially some past 1.4 T This new technology will be brought, I am afraid I have to be implemented on the new 1.5T. Although it is an upgraded version, it is intended to pursue high efficiency, low fuel consumption, but we are still and cherished, after all, if the more stringent emission standards, as well as the trend of electrification, whether there will be a so-called EA311 engine, and it is unknown. In addition, although the coating technology only gives a high power version, this is not a mass quot; reduced quot; after all, the low-power dual cycle system and variable turbine have takeired a lot of costs.