Nowadays, most families can basically own a family car. When it comes to power, many people will naturally think that the turbocharged engine must be a German or American car when choosing a turbocharged engine or a naturally aspirated engine. And naturally inhaling must be the idea of ​​Japanese. In particular, the well-known Toyota engine is defined by most consumers as the “representative†of naturally aspirated engines. In fact, this statement is completely incorrect. Today we will talk about the development of Toyota engines. This article refers to the address: http:// Toyota engine and turbocharged relationship In fact, the naturally aspirated engine has always been Toyota's favorite. After all, the self-priming engine's power can be linear and smooth output, and the smooth feeling of the oil is the turbocharged. However, in the domestic market today, the models equipped with small-displacement supercharged engines are increasing in the Chinese market. In order to cater to the Chinese market, Toyota has regained the technology of turbocharging for many years. In fact, as early as 1986, Toyota The Toyota Supra, nicknamed the Bull Devil, is powered by a 2.5-liter turbocharged engine code-named 1JZ-GTE with a maximum power of 280Ps. With the revitalization of Toyota's turbocharger technology, the turbocharged engine on the Lexus NX model at the 2014 Beijing Auto Show demonstrates Toyota's future ambitions. On the surface, it seems that Toyota is adapting to the trend in the global turbine environment. In fact, Toyota chose the right time to wake up Toyota's turbo technology. One of the highlights of the newly launched Highlander on March 20, 2015 is the addition of Toyota's new 2.0T D-4ST engine, which is the same series as the 2.0T engine used by Lexus NX. Toyota is not satisfied with this. In order to achieve better power and fuel consumption in a small displacement engine, Toyota has launched the D-4T engine, which is currently used on new Corolla, Ralink and other models, to a large extent. It solves the problem of consumers' dual demand for power and fuel consumption. In fact, whether the D-4ST or the D-4T are equipped with pure Turbo engine technology, Toyota's turbocharged engine combines the dual-engine Atkinson cycle technology Turbo, which is absolutely light and smooth in driving. A pure feeling of galloping without worry. Here we have to explain the technical characteristics of the Toyota D-4T engine. D-4T (1.2T) engine technical characteristics First of all, let's talk about the problem of burning oil that everyone cares about. As for this 1.2T engine, this common problem has been solved perfectly. To minimize the mixing of engine oil and unburned fuel, Toyota uses a unique high-pressure injector to return helium (under-burned fuel) back to the intake port, which effectively reduces helium and The opportunity of oil contact, thus effectively solving the problem of large consumption of turbocharged engine oil. This is quite critical, and it can be said that it is a major breakthrough in turbocharged cars. In terms of reliability, Toyota is also trying hard. For the shortcomings of small turbocharged engines, it has been fully optimized for problems such as high explosion, high vibration, high noise and short life. The Toyota D-4T (1.2T) engine uses a low-inertia turbocharger with a single-scroll structure. Toyota uses Computer Aided Engineering (CAE) to optimize the shape of the turbine blades and the casing, allowing as much exhaust gas energy as possible to pressurize the fresh air, contributing to the thermal efficiency of the engine. Integrated exhaust manifold Toyota's D-4T (1.2T) engine features integrated exhaust manifold technology. The integrated exhaust manifold allows the engine coolant to heat up faster, which helps the engine to warm up quickly. When the engine is in high-speed operation, the integrated exhaust manifold can effectively reduce the exhaust temperature and put the turbocharger at a reasonable operating temperature. Therefore, the integrated exhaust manifold technology can also contribute to the reduction of vehicle fuel consumption. VVT-iW variable valve timing intelligent wide angle system The VVT-iW valve timing intelligent wide-angle technology is an upgraded version of Toyota's VVT-i variable valve timing technology. The Japanese pronunciation of "W" and "Double" is the same, and W is also used to refer to Double in many occasions, as is VVT-iW. According to the technicians, the VVT-iW technology allows the engine to operate in both the Alto cycle and the Atkinson cycle under different operating conditions. The variable valve timing is changed from oil pressure control to more precise electronic control, and the variable range of the timing angle is also larger, thereby achieving an Atkinson cycle in which the intake valve is largely delayed. So, what is the Atkinson cycle technology and the Alto cycle? The whole process is actually the process of the intake valve opening and the piston inhaling from the top dead center. When the piston reaches the bottom dead center, the intake valve closes and starts. The compressed gas is moved to the top dead center. After the piston reaches the top dead center, the ignition explosion occurs. At this time, the piston moves downward, and the piston moves to the bottom dead center and then continues upward. At this time, the exhaust valve opens to start moving upward through the piston to exhaust the exhaust gas. In fact, it is simply: inhalation, compression, work, and exhaust. to sum up: Under the background of energy saving and emission reduction in the world, the trend of automobile engine supercharging, miniaturization and light weight has become clear. The entry of the Toyota turbocharged engine into the domestic market is an obvious signal, and the competition of domestic turbocharged engines will also become more and more fierce. In fact, looking at the global sales list, Toyota is already the global sales champion, and when Toyota's D-4T (1.2T) turbocharged engine model joins the competition in the Chinese market, Toyota's turbo increase technology is also more laid out in the Chinese market. For refinement.
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