As mentioned, many domestic brands such as BYD, Changan and Great Wall have their own engines.
First look at BYD, which is also a self-developed brand. Its 1.5T engine is BYD476ZQA, the maximum power is 113kW (154 horsepower) /5200rpm, and the maximum torque is 240Nm/1750-3500rpm. This engine is a Volkswagen 1.4T engine. As a template object for reverse development, it is said that even the position of the oil pump has not changed, relying on the public for so many years, based on the technology is still very good. This engine uses the direct injection technology in the cylinder, its direct injection of fuel in the cylinder Technology can effectively improve engine power. Its dual-stage circuit cooling circulation system is characterized by light weight, integration, and miniaturization, which can effectively reduce the quality of the whole vehicle.
Changan's 1.5T engine is BLUECORE, the blue core. This engine is supported by Changan's power development center in Birmingham, England. It uses the new turbocharger technology of BorgWarner, which combines TC exhaust turbocharger, RFF+. HLA structure valve drive and other technologies in one product. This engine uses fuel double injection technology - both BYD's in-cylinder direct injection, and manifold injection, can well coordinate high-load power shortage Contradictory with oxygen enrichment at low load, there is also a certain optimization effect on power and fuel consumption.
The basic parameters of the engine can be seen in the following figure:
The biggest highlight of the 1.5GDIT engine equipped with the new Haval H6 released at the Beijing Auto Show is the first application of CVVL continuously variable valve lift technology in China, achieving a maximum lift of 8.64MM and a minimum of 0.8MM, which can achieve a maximum fuel consumption of 8.4%. This function is quite practical. Compared with the previous intake air, it is either zero or the largest fuel consumption. In this way, according to the continuous control of the intake air, the fuel efficiency can be maximized. It can be said that it is very fuel-efficient. The electronically controlled supercharger can effectively increase the response speed of the turbine flow capacity, establish a supercharging pressure faster, and thus effectively improve the power.
The engine data is dazzling, its maximum power is 124KW, the turbine increases when the speed reaches 1000rpm, and the maximum torque of 285N.M can reach 1400rpm. The rising torque reaches 190N.M/L, and the comprehensive fuel consumption per 100km is 6.8L. .
Overall, the Great Wall 1.5GDIT and Changan's 1.5T engine have low speed and high torque characteristics, but the 1.5GDIT engine independently developed by Great Wall is equipped with CVVL continuously variable valve lift technology, which reaches 285NM peak at 1400rpm. Torque, higher than Changan's 250NM. This advantage can not only be used more easily in today's congested complex urban environment, fuel consumption is also as low as 100 kilometers, comprehensive fuel consumption of 6.8L, can achieve the highest fuel consumption of 8.4%. And BYD's data To be slightly inferior, the maximum torque can only reach 240Nm / 1750-3500rpm, it can be said that it is quite satisfactory. It is worth noting that BYD also has certain advantages in cooling circulation system and improving fuel efficiency.
Seeing here, we also have a recommendation goal in mind, that is the Great Wall. In order to avoid the lack of a few of our brothers' staff, we also investigated the engine data of the same-level joint venture car and found that the Great Wall engine also has certain advantages.
First, let's talk about Honda's four-cylinder turbocharged engine codenamed L15B. The 1.5T turbocharged engine from the Earth Dream series has a maximum power of 130kW and a maximum torque of 220Nm. This in-cylinder direct injection engine is also used. The technology related to flexible control of intake air - i-VTEC, compared to the eccentric shaft of the Great Wall and the CVVL technology of the rocker arm control lift, this engine uses an overhead double camshaft structure, which is equipped on the intake side. Variable valve timing system and two-stage valve lift adjustment mechanism. Looking at the complexity, we only need to understand that they use different means to control the engine intake, and then save fuel is enough.
Next, let's talk about the 1.5TEcotec of the General Group. The 1.5T four-cylinder turbocharged engine has a maximum power of 124kW/h and can output a maximum torque of 250Nm at 1700rpm-4400rpm. The cylinder head and exhaust manifold used by the universal 1.5TEcotec The tube and the Great Wall Motor 1.5GDIT engine use the same integrated design as the cylinder head integrated water-cooled exhaust manifold. The advantage of this integrated design is to increase engine stability and lightweight characteristics.
Compared with the joint venture, Great Wall Motor 1.5GDIT is technically comparable to these joint ventures. Different technologies have their own characteristics, but in the end, our consumers still look at the data. Compared with the data, the Great Wall has a maximum engine speed of 124kW/ The power of h is universally flush, and the maximum torque of 285N.m is far superior to Honda's 220N.m and GM 250NM. It is also very powerful.
Considering that Great Wall Motor is so powerful, we have studied the relevant technology of Great Wall Motor in particular, and found that Great Wall Motor has made a lot of technological innovations in this 1.5GDIT engine. You can take a look at the following comparison chart:
Through the comparison of the above figure, it is not difficult to find that the 1.5GDIT engine of the Great Wall has a great improvement in maximum horsepower, maximum power and maximum torque. It can be so significantly improved, and the advanced technology adopted by the new engine is inseparable. The most important of these is the optimization of the valve timing/lift system, which makes the engine intake more reasonable, and thus fully improves the fuel efficiency. In addition, the suspended central injection direct injector and the cylinder head are integrated with water-cooled exhaust. Two technologies of manifolding, which further reduce fuel consumption and further improve performance, make this engine even more powerful. It is no wonder that Great Wall Motor can achieve such results.
Overall, in the comparison of several domestic independent brand engines, the Great Wall engine has relatively low fuel consumption and high performance characteristics, and it is not too much compared with the joint venture brand. The new highlights after technological innovation are also based on reality. Instead of 'flower shelf'. We hope that the brothers can listen to my suggestion to use the Great Wall 1.5GDIT engine of 'China Heart', so I recommended the latest Harvard H6 of the Great Wall to the brothers, let the brothers take us to Qiu Mingshan, and over Wuling Hongguang, a generation of car gods.
