Welcome to zhongcai!


Email: gdzcee@gmail.com

Intelligent Engine Integrated Training Platform

Nov 12, 2021

With the rapid development of science and technology, the application of mechatronics technology in automobiles has become more and more mature. In 2017, GM introduced a new generation of Ecotec dual-jet turbocharged engines into the country, which are divided into 1.0T and 1.3T powertrains. The new Ecotec has a series of innovative applications of intelligent mechatronics technology. Like the Ecotec of the year, the comprehensive capabilities of these two engines have allowed GM to be at the forefront of many car companies. Compared with the previous generation of products, the fuel economy has improved. To a certain extent, a balance is found in power output and fuel economy.

At present, the small displacement three-cylinder engine has formed a market. GM, Toyota, Honda, Peugeot, Ford and even the conservative Volkswagen have launched their own three-cylinder engines. Even BMW in the luxury car camp cannot be "exempt." From the perspective of China's environmental protection demands, the development of a new generation of three-cylinder engine technology will be a clear way for automakers to meet stringent carbon emission standards before fully electrified.

However, under the hot momentum of small-displacement turbocharging, it is not without hidden worries. Some people say that because many small-displacement engines are three-cylinder engines, they are born with large vibrations and noise, which affect the comfort of the car.

Obviously, the problem lies in two aspects. One is whether the vibration problem of the three-cylinder engine can be solved, and the other is the unreasonable product line setting, which causes the three-cylinder engine and the four-cylinder engine model to fight each other, causing unnecessary internal friction. In this context, GM has also joined the "meshed" of the small-displacement turbocharged engine camp. However, GM's move looks even more "menacing."

If 2017 is regarded as the first year of China's three-cylinder outbreak, then GM must be the bomber. At the end of September last year, GM introduced the latest generation of Ecotec 1.0T/1.3T engines to the Chinese market. Buick GL6, Yuelang and Yinglang equipped with this small-displacement three-cylinder engine have been quickly received since its launch in October last year. Popularity in the market. From January to March this year, 84,196 Buick and Chevrolet models equipped with a new generation of Ecotec low-displacement engines were sold, steadily occupying 60% of the sales of similar engines in the market. In addition to GM, another prominent player is BMW.

It can be seen from the sales that GM's new generation of Ecotec dual-injection turbocharged engine is a product recognized by consumers. From the perspective of power parameters, the new generation of Ecotec 1.0T and 1.3T engines have maximum power of 92kW and 120kW, respectively, and peak torques of 170Nm and 230Nm, respectively. The data performance of the two engines even exceeds that of many 1.6L and 2.0L naturally aspirated engines currently on the market, especially the torque value of the 1.3T engine has almost reached many 2.5L self-aspirated engines. And compared with the previous generation engine, the two engines of the new generation of Ecotec have reduced the weight by 24 kg and 25 kg respectively, and the fuel economy has increased by 5%-10%. In other words, the traditional three-cylinder engine can only guarantee fuel consumption at the expense of power has not been repeated in the new generation of Ecotec engines.

If it’s just an improvement in power, I don’t think there is a need to write a special book here. In addition to performance, the new generation of Ecotec has made many improvements on the product side, the most important of which is the integration of single-cylinder dual-injection technology. Compared with the traditional single-injection engine, the Ecotec engine with this technology can achieve a wider injection coverage area and a higher fuel atomization rate by the coordinated injection of two injectors, which can reduce the fuel wall and make the injection Fuel is more involved in combustion, which improves fuel economy and reduces fuel consumption and emissions.

In addition, the new generation of Ecotec also has its own advantages in terms of heat management, which is becoming more and more demanding in current engine technology. It adopts a cross-flow separation cooling with precise control of double thermostats. More precise and efficient temperature zone control. Simply put, during the cold start of the engine, the system can keep the cylinder block thermostat closed, accurately control the flow and distribution of the cylinder block cooling water, speed up the warm-up, reduce friction, and improve emissions; and under ideal conditions, cross flow The cylinder head allows the coolant to flow through each cylinder of the engine at the same time, maintains the low temperature of the cylinder head, and reduces the thermal load in key areas. This design has obvious advantages compared with the traditional longitudinal flow cooling method, which ensures the uniformity of cooling. This greatly reduces fuel consumption while improving engine stability.

From the perspective of power performance, engine efficiency and economy, the advantages of the new generation of Ecotec models are very obvious. It not only has a significant increase in thermal efficiency, but also has superior power performance among models with the same displacement. It has always been a problem of carbon accumulation in engines. It also has a good performance, so what about its NVH ability?

In order to achieve a higher level of NVH, GM’s designers designed a pendulum-type dual-mass flywheel for the new generation of Ecotec engines. This flywheel adds a vibration absorber to the traditional dual-mass flywheel, which is a pendulum-shaped centrifugal The pendulum reciprocating action counteracts and reduces the torsional vibration from the active flywheel on the engine side. In terms of belt noise, general designers brought a black technology equipment called Beyond Alternator Damper (OAD), which is actually the generator unidirectional coupling damper in the belt drive system. Its working principle It is to reduce the fluctuation of belt tension and improve the system's NVH performance. Coupled with the use of accessories such as silent timing chains, low-noise fuel rails, and polyurethane foam acoustic covers, the NVH performance of the new generation of Ecotec has been greatly improved. Not only that, the new generation of Ecotec is still a model that is easy to "serve". According to the information released by the manufacturer, 92 gasoline can properly display the performance of this car, and there is no need to worry about the low mark. Problems such as knocking and carbon deposits.

Today, with the increasing development of automobile technology, small-displacement engines have gradually become the mainstream, and more mechatronics technologies have been applied to achieve performance far superior to the previous generation of large-displacement engines. The new generation Ecotec engine with advanced technology is one of them. Based on product experience, consumers' prejudice against small-displacement engines will gradually change.