It is said that Honda's engine is good, why don't domestic cars just copy one?

When it comes to Honda, the first impression is the engine. Honda has a great engine. How good is it? It's called "buy an engine to send a car" in the car circle. Honda's most famous engine is 1.5 displacement Earth Dream series engine. 1.5L engine fascinated Honda Fit, and then developed 1.5T turbocharged engine. Honda 1.5T turbocharged engine has a maximum torque of 260Nm and a maximum power of 194Ps. This level is even better than the 2.0T engines of many car companies. Honda's 1.5T engine has now become. The research and development ability of self-owned brand cars is not good, but the cottage ability is absolutely first-class. Zotye imitates Porsche, and H6' s chassis imitates CRV. But why don't independent brand cars disassemble Honda engines, study imitation and remanufacture, and become their own engines? In fact, car companies with their own brands want to do the same. After all, disassembling other brands of engines and imitating manufacturing can save a lot of detours and greatly save the product development cycle. But after some research, we really don't have that ability!

Engine is the core component of automobile, and none of them contains all kinds of cutting-edge technologies. Maybe we can disassemble Honda's engine and design the dimensions of each part accurately according to the ratio of 1: 1. This is the shape of the engine. However, after the design of engine parts is completed, it is very difficult to select materials to ensure the machining accuracy and assembly accuracy of each part. If the material processing and manufacturing is not up to standard or the machining accuracy of parts is problematic, the engine developed by ourselves may have problems such as cylinder pulling and parts breaking.

At present, the core technology of the engine is electronic control, which involves fuel injection, air intake, ignition advance angle, timing control, oil lubrication and so on. In order to ensure the stability of the engine working process, the engine also has some special logic controls, such as low temperature cold start protection, overheating protection, WCC+UCC control, OBD diagnosis and so on. When the vehicle is running normally, the engine also has special torque control logic to prevent the engine or transmission from being damaged. The electronic control process of the engine is very complicated. If all the control logic is expressed in the form of Word, there may be tens of thousands of pages in the manual alone. How do independent brand car companies get such complicated logic control? Among the independent brands in China, some car companies are famous for their shanzhai. Although it is similar to some international brands in design, it has basically withdrawn from the mainstream camp due to quality problems.

The subject thought of copying other brands of engines, which reminded the hydrogen cloud chain of a joke. In the last century, a company imitated other planes, doubled all the parts of their planes and then assembled them. As a result, it is conceivable that this kind of plane can't fly at all, let alone have high performance. The same is true of car engines. The material, size, layout and micron-scale machining of each part are carefully calculated, rather than simply adding, subtracting, multiplying and dividing. Simple disassembly and reorganization can not achieve the original effect. The deeper reason is that China's material processing and structure are not as good as Japanese. For example, domestic lathes may not meet the design requirements, and the difference is huge. Therefore, the engine must adhere to the positive research and development, so as to accumulate experience and become better in repeated practice. A simple cottage cannot produce the same engine. For another example, Nissan sent a variable compression ratio engine to Tsinghua a few years ago, but so far no car company has adopted the same engine technology, and the gap can be imagined.