https://chejiahao.autohome.com.cn/info/12203357
Translated from Chinese by Bing:
It's heavenly! Chery Aero Engine officially matched with CA42 general aviation fixed wing and passed the airworthiness verification
2023-02-17 10:09
Yesterday, the first domestic civil aviation piston engine with the flight test was successfully completed, in order to ensure that the engine has enough safety and reliability in flight, the flight test is divided into multiple altitude points for testing, with a long preparation cycle, many limiting factors, difficult operation and other characteristics, aiming to verify the AEC2.0L engine in the air compression ignition capacity and re-starting ability, and the AEC2.0L aviation piston engine is not a little familiar? That's right, this is the aviation version of the SQRD4D20 diesel engine that the author first exposed.
The picture above is the AEC2.0L aero engine picture and basic parameters released by Diamond Aero Engine on the day of the test flight, in fact, it has been exposed once before, there is not much mystery, but the significance is very significant, the main thing to overcome is a series of software and hardware key technology bottleneck problems.
As for the parameters of the engine itself, let's take a look at the relevant data officially released by Chery last year, of course, the above picture mainly allows you to see a full picture first, mainly the words "aero engine" at the top, which is quite important, and the model in Chery is SQRD4D20 type, In Diamond Aviation Power Company, it is called AEC2.0L (Chery Holding Group has shares in the company), so everyone will naturally understand, as for another horizontally opposed engine as the main Anhui Hangrui is Chery out of a group of technical personnel to engage in a separate aviation company, you can understand it as a descendant and a concubine, joke, in fact, the latter is now quite prominent, a variety of domestic UAVs are purchased in large quantities.
According to the data from last year's exhibition board, the aero engine is an in-line four-cylinder, 16-valve, double overhead camshaft, high-pressure common rail and turbocharging; At the beginning, it was mentioned that the DA42/40 fixed-wing aircraft matched with Diamond Airlines, but now I know that the DA42 is officially a domestically produced model called CA42.
The picture above is the domestic CA42 general aviation model matched with the AEC2.0L aero engine test flight, and the domestic model of the general aviation aircraft equipped with the domestic civil aviation piston engine has been successfully realized, which is the first time in China that the "double domestic" match is made.
When it comes to technical highlights, first of all, the single-cylinder of the high-pressure common rail direct injection system independently and accurately corrects the amount of fuel injection, improves the working uniformity of each cylinder, reduces vibration, and the high-pressure (4.0) is stronger than the turbocharger to adapt to high altitude, and the performance at an altitude of 10,000ft has no attenuation.
Secondly, the use of compacted graphite cast iron, high-strength aluminum alloy and other materials to reduce the weight of the engine, improve the cruising range, lubrication pipeline, oil pan and valve chamber cover camshaft bearing cover highly integrated design, also to reduce weight.
The resulting net weight of the whole machine is 151 kg, this is not a car engine, do not apply the weight of the engine of the car to analogy, pay attention to the displacement is 2122mL, fortunately this is an aero engine, otherwise according to the model of the car engine to analyze there must be an error, at the beginning of the author to see the SQRD4D20 model of the first reaction is 2.0L displacement, now it seems that this is not the case, the actual displacement is larger.
The rated power is 132Kw/3887rpm, the size of the whole machine is 603/848/568mm, not big or small, and the ordinary car engine is almost the same, of course, taking into account the narrow power compartment design, or different from the appearance layout of the ordinary fuel engine, in fact, if you look carefully at the CA42 engine shell and the DA42 engine shell, you can find that the air intake has been different, after all, the powertrain is completely different.
Another significant significance is reflected in the successful completion of the airworthiness certificate test in this short sentence, in fact, it has been tested before, the significance of this test flight is actually double, one is the pure domestic CA42 fixed-wing aircraft itself, the other is the matching of the domestic engine, the most important thing is that the piston aero engine is aimed at the field of civil aviation, compared to the main unmanned field of Hangrui, the meaning of the two is naturally not the same, as long as it involves "people", the airworthiness certificate is a threshold, Therefore, the airworthiness certification test of air restart is particularly important.
Now you can see the importance of internal combustion technology, right? It is not that new energy models are popular, and internal combustion technology is declining, which is not the case at all, on the contrary, it is also promising in other fields (aviation, ships, etc., especially the latter, and now Hangrui Aviation Power has also begun to set foot in the field of inland waterway ships), at least at this stage, there is still a long time before the official exit.
In fact, the new energy technology route, especially the pure electric mileage has not been greatly improved, the route represented by hybrid technology still needs the blessing of internal combustion technology, which is why Chery is still insisting on the development of the fourth/fifth generation engine, fuel saving is not a single choice, but a two-way choice, through all levels of technology improvement and iteration to continuously improve, just rely on the infinite increase of the drive motor and battery pack to solve the problem, you might as well directly make a simple and reliable pure electric model finished.
WA between CAAC and EASA on Diamond Aircraft Industries.pdf