(Keywords: Huawei DriveONE motor, oil-cooled electric drive, special 1.5T for extended range, 100 kilometers of fuel consumption estimate)
号 M7 is a medium-sized SUV produced by Selice Automobile. The body length is more than 5 meters and adopts a three-row 2-2-2 seat layout, which can meet the current car needs of many members' families. The Huawei motor and Huawei Hongmeng HarmonyOS cockpit are highly concerned. So where does the AITO号 come from? It has something to do with Huawei 号. Is the extended range 1.5T generator it is equipped with high fuel consumption? Comparing the ideal L9 technology of another extended-range electric vehicle, we will analyze it in detail below.
A source of AITO brand and its relationship with Huawei
In December 2021, at Huawei's new product launch conference, a new car brand - AITO. In fact, long before the birth of the QQ, Huawei launched a cooperative model with the brand Selis, a subsidiary of Xiaokang Group. The new brand Selis, which is equivalent to the improved product of the early model Selis SF5 , also entered Huawei's smart selection channel for sales. In fact, this is not "Silis manufactured for Huawei" or "Huawei's car manufacturing".
Silis' full name is JinkangSilis. The company can be traced back to the popular Dongfeng Xiaokang Van in 2006. It was jointly ventured by Dongfeng Group and Yu'an Group. It was in the van market with Wuling Zhiguang and Chang'an Star . After Xiaokang Van became popular, the company directly renamed it to Dongfeng Xiaokang Auto , and JinkangSilis is a new energy vehicle company established by Dongfeng Xiaokang Auto. How about the extended-range 1.5T engine equipped with
?
wenjie M7 is equipped with a dedicated engine for extended-range cars code-named H15RT. Many people will compare the extended-range car with the SF5. In fact, the two cars are completely different from the power level. The early SF5 directly transplanted the 1.5T four-cylinder engine from another car of Xiaokang Automobile, Dongfeng Fengguang 580, with the code name SFG15TA. As the engine of a fuel vehicle, if it is directly used for extended-range power generation, the efficiency is not high. Maintaining a constant high speed also means high fuel consumption.
H15RT is an improved version of the 1.5T of the fuel vehicle. It is newly equipped with DVVT intake valve and exhaust valve variable timing technology, and adjusts the switching time of the intake valve at any time. If the intake valve is delayed during the engine operation, or the intake valve is opened in advance, it can bring about Miller cycle effect, reduce the temperature of the engine cylinder at the end of compression, and reduce the chance of knocking . Therefore, the compression ratio can be improved as much as possible. The compression ratio of H15RT is as high as 15:1. The increase in the compression ratio means an increase in thermal efficiency. The thermal efficiency of this engine (generator) reaches 41%.
Miller cycle and Atkinson cycle are the same principle. The turbocharged is generally called Miller, and the naturally aspirated one is called Atkinson. It is common on Japanese hybrid vehicles such as Toyota . The advantages of these two cycles are high thermal efficiency and fuel saving, but the problem is also obvious, that is, the engine power is reduced, and the high compression ratio means that high-grade gasoline is required. The M7 must add gasoline above No. 95, and if 92 is added, it may cause a knock.
How much electricity is generated by a box of oil and how much fuel consumption is? Compared with the maximum power of L9
90kw, it is obviously impossible to directly push an SUV with a body of more than 5 meters. However, when used as a generator, it is relatively fuel-efficient at a constant speed, with a power generation efficiency of 3.13 degrees/liter. At the same time, the vehicle has a kinetic energy recovery system. A box of oil in 54 liters can generate 173 degrees of electricity. Combined with the original 40 degrees of ternary lithium battery, the M7 is equivalent to an electric vehicle with a 213 degree battery. It has a range of 135 kilometers without a range extender. Although the fuel cost is higher than the electricity cost of direct charging, it brings a range of more than 1,000 kilometers, which is also the biggest advantage of an extended range electric vehicle.
compared with the ideal L9 24.3 degrees of power consumption per 100 kilometers, the M7 dual motor version consumes lower power consumption, at 24 degrees per 100 kilometers. If the battery is exhausted, needs 7.66L of oil per 100 kilometers, which is worthy of recognition for SUVs with a comprehensive torque of 660Nm.
Practicality
-6-seat car space
M7 has a length of 5.02 meters, which is much longer than the 4.77 meters of the M5. However, the wheelbase of the two vehicles is close, and the growing part is mainly in the rear suspension, which is the third row space. The 2+2+2 seat layout allows a channel in the middle of the second row, which can be more convenient to the third row. If there is no one sitting in the third row, the second row can also be suspended and lifted 30 degrees. Long-distance travel is like a recliner.
Driving a traditional medium-sized SUV requires a good acceleration experience and high-speed overtaking is easy. It requires a large displacement engine with a torque of 660Nm, and at least a 3.0T engine. The fuel consumption per 100 kilometers is more than 10L. The engine equipped with the M7 is only used to generate electricity and the speed is constant. We have calculated that the fuel consumption per 100 kilometers is 7.66L.
On the M5, the front motor is the AC asynchronous motor created by Dongfeng Power Drive Company, and the rear motor is Huawei DriveONE permanent magnet synchronous. The AC asynchronous motor has a large torque. The 720Nm comprehensive torque brings 4.8 seconds of acceleration time of 100 kilometers, but it is easy to overheat. Therefore, on the M7, both front and rear are replaced with DriveONE permanent magnet synchronous motors, with oil-cooled. Although the torque has been reduced, the output is more stable, and 660Nm is completely sufficient.
Charging time/smart
Huawei HarmonyOS cockpit is a highlight of the world M7. Not only does this platform provide the possibility for using more in-car APPs, it also combines hardware manufacturers such as seats, holographic screens, and in-car skylights to bring a smarter and more integrated user experience. Just like smart home, the entire cockpit is more intelligent and provides OTA upgrades. In terms of charging
, although the M7 has not announced the fast and slow charging time at present, it is equipped with the same 40-degree battery as M5. The fast charging (80% battery) time of M5 is 45 minutes, and slow charging is 5 hours. It is expected that M7 will be close to it.
Car Selection Detective Views : By optimizing the problems existing in old products, the new M7 basically throws out the problems existing in the previous two models, and the balance between fuel consumption, power and stability is reached. The price of 319,800-379,800 is also lower than that of the ideal L9, forming differentiated competition. What do you think the price of M7 in the world? Welcome to discuss.
#Ask the world whose cake M7 has moved#
