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2017年 09月 05日
In the development of automatic driving competition, Google and other technology companies received a lot of attention. But a new study shows that these technology giants may be difficult to beat traditional car manufacturers and parts suppliers.In order to understand which companies are leading the development fit BMW Turbo for sale of automated vehicle technology, the German Cologne Institute of Economic Research has identified and analyzed 5839 patents over the past seven years.As we have seen in the table below, the traditional car manufacturers and parts suppliers - the German three strong - are leading automatic driving technology, rather than the technology companies we see.
2017年 06月 12日
Turbocharger technology seems to have been dominated by European depot for many years? Japan car factory stick to the natural aspiration field, conservative do not want to take a step until the two years before Toyota, Honda launched its own 1.5T and 2.0T engine? Do not forget, as early as 2011 Dongfeng Nissan launched TIIDA GTS, equipped with a 1.6T turbocharged MR16DDT engine, which is the Japanese depot in China's first turbocharged models. If you are a senior fan, to understand Nissan turbo history, know that Nissan has produced GTR R32, R33, R34 equipped with RB26DETT turbo engine, you will be completely reassuring Nissan. But a pair of looks good engine, wrong on a TIIDA body, the final outcome is to stop production. TIIDA GTS This pair of MR16DDT, is the first deputy of the Department of turbocharged machine, only in foreign equipment Juke small SUV, has been well received. Like VQ, the MR series engine is the dominant driver of Nissan and Renault small cars with 1.6L, 1.8L and 2.0L of gasoline engine displacement. MR16DDT and ordinary TIIDA MR16DE that there is a big difference, the displacement is also a small difference, not natural suction version of the plug-in turbine so simple. MR16DDT is more in the larger displacement of the MR18DE based on the narrowing of the development of the cylinder (bore 79.7mm), all of the two strokes are 81.1mm, are all aluminum alloy structure, and thicker cylinder can guarantee pressurization The durability of the machine. MR16DTT has a large number of new technologies, design ideas are different from the European car, Nissan more emphasis on the reliability and economy of the machine. Nissan called DIG-T (Direct Injection Gasoline Turbo-charged) turbocharged direct injection technology, fuel injection into the cylinder twice, although only low temperature start with stratified combustion function (this effect mainly to reduce emissions), and General SIDI the same role, but also can play a role in improving fuel economy. Although there is no variable lift technology, but MR16DDT has both intake and exhaust side of the "double variable valve timing" technology, this point even the GTR VR38DETT are not. But the same, MR16DDT uses the same engine technology as Nissan GTR, such as sodium-cooled exhaust valves, lightweight and low-friction internal design, nano-precision machining of the camshaft, honeycomb valve spring, etc., which reduce the engine interior Sports resistance play a key role, usually we said Nissan engine particularly "smooth" also derived from this. Even we have been worried about the issue of burning oil, Nissan has also been taken into account, through the piston to increase the special oil tank, the excess oil recovery, to avoid the oil into the cylinder burning out. Now TIIDA GTS has been discontinued, but then I have tried to drive Turbo Kit TIIDA GTS, what kind of experience will be? If you are accustomed to TIIDA has always been very quiet car environment, then the GTS will give you a different feeling, start the engine after the car will always be accompanied by "rumbling" low noise. 190 horsepower and 24.5kgm torque is not really covered, the speed of a pointer on the pull you crazy forward, then the same size of the domestic car, and only 6 generations of golf GTI to get it. In the past, the natural suction version of TIIDA torque concentrated in the low-emission release, the Electric Turbo speed after 3000rpm after the noise will increase, but the acceleration began to weaken, but TIIDA GTS is completely different, and other indicators after passing 4000rpm, power Still continue to come, it is easy to speed up to 180km / h. MR16DDT does have the tendency to adjust the movement, after the speed of 4000rpm, the pointer instantly climbed to the red line, if you use the 6MT manual block, shift slower will be busy. MR16DDT design ideas and the European depot is different, the Japanese relatively pure pursuit of the performance, the use of large turbines squeeze more powerful power, but Balanced Turbo it also led to the maximum torque of 24.5kgm postponed to 2400rpm release, how many will Low torsion is somewhat inadequate. But very pleased, normal driving when you are not easy to aware of this, the turbine involved in the work fairly smooth, hysteresis is there, but not obvious. By the way, there is no Infiniti ESQ this model, it is Nissan Juke for a vest, Infiniti specially prepared for the Chinese market models. So all of its performance, including NVH performance or Nissan level, of course, ESQ sales is bleak. Infiniti ESQ, it should be said that Nissan Juke also use this pair of MR16DTT 1.6L turbocharged, in the ESQ above the MR16DTT also deliberately increased power, output up to 147kW / 6000rpm and 250Nm / 2400-4800rpm, the data with a pair Excellent 2.0T engine is almost the same.
2017年 06月 12日
The car is always for human services, he can be said to be our second home. Modern people have a lot of definitions and needs for this home, so many people would like to ask is the car is not suitable for home, open high-speed stability and instability, encountered bumpy road Shu uncomfortable, turning the car roll Powerful This is due to the car chassis adjustment. Review, the chassis system generally includes suspension, steering system, brake system, body stability system. But to be honest, we bought about 20 million ordinary car chassis chassis technology are similar, as the main plant, a 200,000 car, all of his chassis procurement costs are mostly below 1.5W. It is conceivable Racing Rods that if the supply of various components as a chassis, how low the cost of control, so far the car front and rear bridge suppliers can make the profit rate to 12%, is the most expensive chassis, so The suppliers of the chassis parts are designed to be as simple as possible and easy to manufacture and develop. But there is one thing do not look at his form is very simple, but the built-in technology on the chassis comfort is to play a decisive role. That is the current car shock absorber, is a very non-profitable industry (the supplier's profit margin is only 5% or less) is very important. Can make you the most direct feeling that the car is uncomfortable gt15 turbo that is hanging. And the impact of the suspension system Shu comfortable core is the shock absorber, not a lot of keyboard car God said the suspension structure, we all spray the public with a car suspension (non-independent suspension), but as long as the shock absorber damping force to adjust to A particular value, the comfort of the lorry suspension can definitely be higher than the independent multi-link structure. Of course, the limit driving is certainly not, car gods do not need to take all kinds of evidence to prove that the multi-link car than the car clever. Thick with spring plate and spring is the former shock absorber, the industry called strut, fine after the shock absorber, the industry called shock. Your car is uncomfortable thanks to the shock absorber soft or hard. Soft or hard adjustment is the number of shock absorbers in the number of valves, shock absorber damping force is divided into six speeds in the force value, the shock absorber in the manufacturing process 100% monitoring the second speed and the fifth Speed ??damping force value, the production line will have a damping force detector. Two five speed were 0.13m / s and 0.52m / s. This is the German people in the study of the daily road traffic encountered in the ups and downs of the experience summed up to set the standard for more than 100 years. The shock absorber in this two or five speed is divided into two-speed recovery and two-speed compression, five-speed recovery and five-speed compression, represents the shock absorber piston movement of the two strokes (pumping and plug). The number and thickness of the diaphragm at the end of the shock absorber directly determine the recovery fit bmw e36 coilover kit of the 25 speed, the end of the valve end of the number and thickness of the valve directly determines the recovery of two or five speed. General German car shock absorber valve number is more, so the damping force is very large, the filter makes people feel very comfortable, Japanese car shock absorber partial light, but the life of the shock absorber and lightweight Structural design is his advantage, for the filter, the shock absorber is usually clean and neat, on behalf of the model of intellectual and Angkesai La, this design also caused most people think this car is very Britain. The car in a high speed over a pit, the tire down the first movement, your shock absorber relative to do a stretch movement, and then leave the pit, your tire up movement, your shock absorber on the relative to do a compression movement The You will certainly say that time LV, this broken road, scared to death your father. However, there is no shock absorber filter the pit, then you roll over or overturned, and quickly knelt down to see the shock absorber for your father! Keke, this stretch is a stroke of the trip, the trip has a very complex mystery, these mysteries let you sincerely praise, this car really comfortable ah, at 6 kinds of speed under the tensile and compression force value and tone School, is the secret of each supplier's own technology. By the German system as the representative Audi a6 1.8 Turbocharger of the Zifu's saxophone shock absorber, the advantage lies in the design of the valve and the structure, making the shock absorber performance is very high, especially in the filter is excellent, you can create a driving sense of high, But because of the complex structure of many shock absorbers, its durability and durability is not as good as the opponent, on behalf of models: Volkswagen series (Sachs contracted the north and south 80% of the models of the shock absorber), BMW X1, BMW 5 Series, Mercedes-Benz V212 and W204, Buick Werang. In the end: the shock absorber is not wearing parts, but because of the deterioration of road conditions in China, our car at high speed, a minute or even may do more than 200 itinerary, shock absorber in the oil temperature will gradually increase , If the long time to go non-pavement and maintain a certain speed, is not conducive to the use of a long time shock absorber. Therefore, as practitioners, personally think that the car in the 60,000 km need to make a replacement to the shock absorber, to maintain a good vehicle comfort and working conditions.
2017年 05月 19日
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2017年 05月 19日
Now the hybrid electric vehicles, pure electric vehicles to flourish, and the state of the car emissions requirements more stringent conditions, the traditional internal combustion engine power system will be how to develop it? The future development of the traditional power system, Dieter Tsai Che replied that the internal combustion engine will still be an important member of the future car power system. Because the Daimler Group plans to 2025, the overall sales of electric vehicles reached 15% to 25%, so by 2025 when there are still 75% to 85% of the models will use internal combustion engine. So the traditional internal combustion engine is still the mainstream. The future of Daimler's internal combustion engine, towards the Turbocharger, modular production, attention to the direction of thermal efficiency. The resurrection inline 6-cylinder engine is an example. In the view of Dieter Tsai Che, cylinder direct injection + turbo + modularization is the future development trend of internal combustion engine. The invention of the internal combustion engine originated in 1886, Karl Bentz and Gottlieb Daimler's invention. Has been 131 years of history. When Carl Bentz invented the internal combustion engine displacement 984cc, the maximum horsepower 0.7ps / 400rpm. 15km per hour can be exercised. With the passage of time, greater horsepower, faster speed, has become the goal of various manufacturers to develop internal combustion engine. So the engine displacement is growing, to 1910, the world's first breakthrough speed of 200km / h speed of the car, equipped with Mercedes-Benz is the development of the engine. The reduction in engine displacement starts from the French GP tournament. The beginning is to improve the efficiency of the engine, then gradually become part of the rules of the game. Was first led by the French Peugeot racing, was equipped with a 7.6-liter displacement engine Peugeot in speed over 14.1 liters of displacement of Fiat. But to say that the engine displacement reduction, have to say the United States. After Europe, the United States became a major producer of automobile production in the world and established a superpower status after World War II. In the oil crisis, Germany, Japan and other auto companies have introduced cheap, small cars into the US market. In the process, there are security problems and environmental problems. In the safe recall, led by Ralph Nader, the earliest contributed to and improve the car recall system. At the environmental level, in 1970, the United States adopted a ban on decommissioning of internal combustion engine emissions. Internal combustion engine is facing a new transformation, followed by Honda will be introduced to meet the new emission regulations CVCC low pollution engine. And in the first generation of Civic, proud to write the CVCC letter on the hood. In the process, there are security problems and environmental problems. In the safe recall, led by Ralph Nader, the earliest contributed to and improve the car recall system. At the environmental level, in 1970, the United States adopted a ban on decommissioning of internal combustion engine emissions. Internal combustion engine is facing a new transformation, followed by Honda will be introduced to meet the new emission regulations CVCC low pollution engine. And in the first generation of Civic, proud to write the CVCC letter on the hood. Although the beginning of the 21st century, there have been direct injection of fuel into the cylinder direct injection technology, gasoline engines and diesel engines have made a good application. But the history of fuel injection device has been more than 100 years. In 1898, Germany DMF (Deutsch Motoren Fabrik) company began to study, in 1937, the aircraft used in the engine fuel injection system, so the technology used in the car, it took a long time. The earliest in-cylinder direct injection engine is Bosch and Gutbrod joint research and development of the cylinder direct injection two-stroke gasoline engine, the maximum power of about 28 horsepower, the maximum torque of 58 Nm, mounted on the Guliath GP700 models. Guliath GP700 for most people is the museum's cultural relics, or simply have not heard of. Then the Mercedes-Benz 300SL, which is now available in 1954, may be more representative, and it is also one of the early models equipped with a direct-injection gasoline engine. But was subject to technical restrictions, and not widely used and promoted. Direct application of the direct injection system is popular from the public Audi. Called the FSI Turbocharger engine has now been widely used. Direct injection system and turbocharger system to achieve a small displacement, high power. Since 2007, most of the world's auto companies have adopted this approach. Direct injection method because the cylinder knock stronger, is conducive to improving fuel efficiency and reduce emissions. Followed by Volkswagen Blue Motion. BMW's Blue Efficiency, Mercedes-Benz Blue Tec, etc., European car manufacturers to direct injection to give a high expectations. As the fuel direct injection and turbocharger use, the original need for 12-cylinder engine to the outbreak of power, and now eight cylinders is enough. Of course, in the super sports car and high-end brands still exist 12-cylinder engine. However, according to the market reaction, in the early 21st century, the US 8-cylinder car engine market share of 45%, now down to 15%. While the 4-cylinder car's share increased to 70%. Reduce the displacement while enhancing the power, consumers can spend less than before the cost to enjoy the pleasure of the sports car. Even Ferrari is gradually using V-8-cylinder engine, and give up the continued use of V12 engine. The future of ultra-running era, V8 will become the mainstream. However, direct injection engine also has its drawbacks. Injector direct injection system structure, the injector directly fixed to the cylinder fuel injection, although driven by high pressure pump, the fuel atomization capacity is better, but because the fuel directly into the high temperature state of the cylinder, leaving Fuel vaporization time is very short, which also for the discharge of more particles to create the conditions. So the use of in-cylinder direct injection technology than the Exhaust Manifold jet engine emissions of particles to be higher concentration. In other words, the two cars of the same level, equipped with direct injection engine in the emission than the use of manifold jet engine emissions of more particles. Causing environmental pollution. So the Japanese brand development of direct injection engine is relatively late, and more focused on hybrid electric vehicle technology. Volkswagen introduced the concept of modular platform in fact also involves the power system, the current well-known MQB module child platform although there are body manufacturing. However, in the field of powertrain, Volkswagen has a petrol engine MOB (modular gasoline engine system) platform and diesel engine MDB (modular diesel engine system) platform. In the third generation of the public EA888 engine, the public uses a dual injection system, in short, when the low load conditions, the manifold nozzle in the cylinder intake stroke fuel injection, the mixture into the cylinder, and then with the compression stroke Cylinder injector fuel injection, in order to achieve stratified combustion; high load conditions, only in the compression stroke in-cylinder direct injection. In this way, not only can improve the efficiency of the engine, but also to avoid the above mentioned in the low load conditions due to excessive oxygen emissions caused by the problem. But there are still media reports that the use o f dual-jet third-generation EA888 engine still has nitrogen oxides (NOx) and particulate matter (PM) emissions are too high problems. In fact, any host factory is not the perfect engine, but they have a more perfect engine, the new machines are to reduce fuel consumption, reduce emissions, improve durability and other aspects, in line with policies and regulations at the same time, also Throw consumers to enjoy the convenience of science and technology.
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