Su Wanhua, Honorary Director of China Internal Combustion Engine Society, Academician of Chinese Academy of Engineering
In 2005, Volkswagen's diesel emissions scandal, followed by GM, BMW, Mercedes-Benz, Bosch and other car prices and suppliers have been involved in this storm, coupled with the recent global environmental pollution problems become increasingly serious, people can not help but start to doubt the car exhaust or Caused by the culprit of pollution? Subsequently, the vigorous new energy car curtain officially opened, with the continuous promotion of new energy vehicles, does it mean that the traditional internal combustion engine has come to the end? Electric vehicles can replace the traditional internal combustion engine in a short time The
In the October 25 "low-carbon car innovation" forum, from the Tianjin University of Chinese Academy of Engineering Su Wanhua preached: 'The future for a long time car internal combustion engine still dominate, this is my basic point of view . In addition, he believes that low-carbon emissions can not really be seen as new energy, 'new energy vehicles in the manufacturing process will cause a lot of environmental problems.' On the other hand, the internal combustion engine can use flexible fuel , Including fossil fuels, natural gas, biomass fuels, ethanol fuels, etc., its processing technology is mature, easy maintenance.
Internal combustion engine technology still has great potential
From the speech of the Academician Su Wanhua, he can see that he still has confidence in the development and potential of the internal combustion engine.He said that the internal combustion engine has many advantages, on the one hand, the internal combustion engine energy density is high, now the passenger car power in the laboratory can To 150kW / L. In addition, the thermal efficiency of the internal combustion engine is also high, the thermal efficiency of the gasoline engine can reach 45%, the thermal efficiency of the diesel engine close to 50% .On the other hand, the internal combustion engine can use flexible fuel, including fossil fuels, natural gas, Ethanol fuel, etc., with diverse sources, coupled with the internal combustion engine processing technology is mature, easy maintenance.
In addition to many advantages, the internal combustion engine still has the development of space and potential. 'The current focus of international engine research and development in improving thermal efficiency, effective thermal efficiency of 60% is the international goal of the internal combustion engine sector.' Su Wanhua said, 'the world's major countries are set It is an important driving force for the development of internal combustion engine technology.It can be said that the current harmful emissions have reached the level of nearly zero, the first decade is ultra-low emissions, ultra-low emissions, now Which is much lower than that of the ultra low emissions, and the main emissions of the internal combustion engine is reduced by about 90%, and the addition of the improved emission method for fuel trucks is very beneficial to reducing harmful emissions.
Innovative technology of internal combustion engine is endless
First, a new generation of advanced combustion technology, including the combustion of gasoline, dual fuel reactivity control or fuel mixture of different ways to control the reaction of the reaction, HCCI combustion, gasoline engine direct injection pressure, etc., reflecting the high The role of the promotion of thermal efficiency.
Second, the multi-variable control technology developed rapidly. Internal combustion engine in the end along this variable, controllable, intelligent development, and the rapid development of the last decade, including variable pressurization technology, variable valve Timing and lift technology, variable direct injection or double spray technology, variable compression technology.
Third, the boost miniaturization of the current new models are basically using a small booster technology. Passenger car market inside the 3-cylinder and 4-cylinder gasoline engine will account for 66%, 3-cylinder technology with 48V hybrid technology will save Cost effectiveness.Currently, the United States in the heavy car started with gasoline plus a range of hybrid, very promising.
Fourth, reduce the loss to improve efficiency. Losses can include exhaust losses, cooling losses, loss of the pump, loss of lubrication, etc., for these losses can be used to boost, compression ratio of waste heat utilization, and low dispersion technology to solve. Of the loss, we now use the variable frequency pump to solve.
Fifth, information, electrification, intelligent aspects of progress, mainly to improve the computing power of the car, in 2025 electronic products in the powertrain cost will increase by 15%, so in fact intelligent, electrification is not electric cars Patent, for the internal combustion engine car in fact we are also actively to the information, electrification, intelligent direction, and in fact has been a very successful results.
Internal combustion engine energy-saving emission reduction long way to go
'To accelerate the development of vehicle internal combustion engine technology is the national energy and environmental events in the world of internal combustion engines to improve energy efficiency and reduce carbon emissions as the goal, the new technology development speed, new technology emerging, China's internal combustion engine industry can not slack, To encourage the internal combustion engine industry innovation is the right path of China's auto industry to power. 'Su Wanhua said,' China's automotive internal combustion engine technology is developing rapidly, the results are excellent, we look forward to subversive, leading technology in China, that time we Can say that China is a car power.