More and more enterprises are competing for vehicle sensors. Recently, Sony announced that it has officially launched the image sensor business for vehicle cameras, and three-dimensional sensor technologies such as “millimeter wave radar” which measures the distance between vehicles and obstacles through radio waves and “lidar” which uses lasers have also emerged.

In the era of automatic driving, the sensor is known as the “eye of the car” as the core component. With the development of a variety of sensor technologies, electronic, automatic and networked vehicles are popular among consumers. The R & D and innovation of automotive electronic technology has made revolutionary progress in the aspects of power performance, economy, safety and comfort. Of course, the comfortable driving environment is not only confined to the car, but also the public’s environmental awareness is constantly improving, which makes the demand for automotive gas sensors in the entire automotive industry rising.

As the information source of automobile electronic control system, vehicle gas sensor is the key component of automobile exhaust after treatment system. It directly or indirectly determines the control level of automobile emission, which is helpful for automobile energy saving and environmental protection, reducing emission pollution and improving energy efficiency. With the rapid development of automotive electronics, automation and networking, automotive gas sensors are facing a period of rapid development opportunities.

The number accounts for more than 50%, and the development space of vehicle gas sensor is large

Sensors play an important role in national economy, national sustainable development strategy and national defense construction. As one of the types of sensors, automotive sensors also play a key role in related fields, and the industry development is widely concerned.

The number accounts for more than 50%, and the development space of vehicle gas sensor is large

Since entering the 21st century, the rapid development of automotive electronics, automation and networking has provided an opportunity for the development of automotive sensors. An Liqiang, chief chief chief engineer of electronic control integration of Guangxi Yuchai Machinery Co., Ltd., said in an interview with China Electronics News that after the electronic control of automobile engines, the number of sensors applied to engines has gradually increased from 2-3 in the original mechanical engines to more than 30 in the current 6 engines, with an increase rate of more than 10 times.

There are many kinds of vehicle sensors, and vehicle gas sensor is one of the most important parts. Amway introduced that among the sensors used in engines, the number of automotive gas sensors accounts for more than 50%, with 5-6 types. At present, only the commonly used pressure MEMS sensors have a market scale of 70 billion yuan.

The “working task” of vehicle gas sensor in automobile engine can not be ignored. Li Daming, general manager of Zhuoping intelligent technology Wuxi Co., Ltd., told reporters that automotive gas sensors are mainly used in automotive internal combustion engines, responsible for the accurate collection of gas temperature, pressure, flow, component concentration and other information of various parts of the engine.

Vehicle gas sensors also have great achievements in the field of environmental protection, and gradually become an important driver of energy conservation and emission reduction. Sun Weilong, general manager of Xi’an Chuanglian Electric Technology (Group) Co., Ltd., pointed out that automobile exhaust contains oxygen (O2), nitrogen oxides (NOx), particulate matter (PM), carbon monoxide (CO), carbon dioxide (CO2), hydrocarbons (HC) and other different gases. Therefore, specific sensors are needed to detect different gases to improve the quality of automobile fuel It can improve the combustion efficiency and energy conversion rate, and reduce the polluting exhaust emissions. At present, the gas sensors used in automobiles mainly include oxygen sensor, nitrogen oxide sensor, ammonia sensor, particulate matter sensor, and hydrogen (H2) sensor for new energy vehicles.

China’s automobile industry has increasingly strict requirements for energy saving and emission reduction. As a powerful booster of automotive energy saving and emission reduction, the market demand of automotive gas sensors is increasing. Jian Jiawen, vice chairman of the solid state ion branch of China Silicate Society and professor of Ningbo University, said that up to now, according to incomplete statistics, nearly 100 enterprises of all sizes have participated in the layout of automotive gas sensors in China. The product technology level has developed rapidly, and the gap with foreign countries has been narrowing.

Innovation and R & D have made initial progress, and technical weaknesses still need to be tackled

Vehicle gas sensor is a master of many disciplines, with high technology content and difficult research and development. On the whole, foreign manufacturers almost monopolize the domestic automotive gas sensor market, and China’s related products still rely on imports. At present, gas sensors for main engine plants in China are mainly provided by several foreign-funded enterprises, such as the mainland, Bosch, Delphi, Sensata, etc., which not only increases the assembly cost of main engine plants, but also hinders the improvement of domestic automobile electronization and intellectualization level, as well as the promotion and popularization of energy-saving and emission reduction technology.

In the aspect of vehicle sensor technology research and development, there are still some weak points in our country, and some technologies are far behind the advanced level of foreign countries. Jian Jiawen told reporters that the principle and design technology of automotive gas sensors are at the same level at home and abroad, but the level of manufacturing and testing technology between domestic enterprises and foreign companies is quite different. Li Ming is in the leading position in the research and development of automotive gas sensors, especially in the field of gas sensors.

Although domestic R & D work has made some achievements, domestic enterprises still need to continuously improve their technical strength, especially to strengthen the research on core chips, materials, processes and other aspects of technology. Amway told reporters that from the perspective of relevant technology development and application, in recent years, some ordinary non intelligent pressure, temperature and speed sensors have basically realized localized production, but high-tech intelligent complex sensors (such as nitrogen oxygen sensor, intelligent high temperature sensor and intelligent flow sensor) still rely on imports.

Compared with foreign enterprises, domestic vehicle gas sensor enterprises also have deficiencies in market share and production scale. Jian Jiawen pointed out that at this stage, the production scale of related products of domestic enterprises is too small. “As the largest domestic manufacturer, the annual output of automotive gas sensors is only about 2 million. In contrast, the annual output of foreign enterprises can reach tens of millions, and the gap between domestic enterprises and foreign enterprises in terms of production scale is obvious. ” He said.

At present, the domestic vehicle gas sensors are mainly sold in the aftermarket, but the front is less. Jian Jiawen said that the technical gap in product precision, consistency and stability, and the lack of localization driving force of domestic automobile engine and vehicle enterprises are the main reasons for the difficulty in front loading and matching of products.

The advantages of foreign vehicle gas sensor enterprises are also reflected in the product management system. Li Daming told reporters that foreign automotive products have strict quality system requirements and high entry threshold, so domestic enterprises still need to strengthen product quality management.

Finding the right breakthrough, industry university research urgently needs linkage

How to achieve a breakthrough in the field of automotive gas sensors? Industry insiders have said that there are “breakthroughs” in raw materials, technologies, processes and policies.

In terms of core technology research and development, the relevant state departments need to give more support to it. Amway said that relevant departments should invest professional resources scientifically and reasonably, conduct systematic research and development for the industry, and further promote the industry university research model.

Domestic enterprises still need to increase investment in production technology and intelligent manufacturing. Li Daming stressed that only through large-scale R & D investment in the industry based on independent intellectual property rights can domestic manufacturers improve the quality of their products. In addition, the accuracy, consistency and stability of products should be improved. “The products produced should meet the requirements of automobile level reliability and ensure the reliable operation of products in extreme environment.” He said.

Policy guidance is very important for industrial development. Li Daming said that relevant departments should standardize the management of the industry to ensure the orderly and healthy development of the industry. “It is suggested that quality inspection and supervision should be implemented for sensor products such as nitrogen oxygen sensors, which have a direct impact on engine emissions, and enterprises should be guided to standardize operation, so as to continuously improve product quality.” Li Daming said.

New energy vehicle is one of the important fields of new infrastructure. It will get rapid development at present and in the future, which brings more development opportunities for automotive gas sensor industry. Jian Jiawen pointed out that the development of new energy vehicle industry has given birth to the demand for gas sensors. For example, hydrogen vehicles need to use a large number of hydrogen sensors to meet the safety needs. In the process of using lithium battery, hydrogen fluoride gas will be released due to the rise of temperature. Therefore, the detection of hydrogen fluoride gas can monitor the safety status of lithium battery, and hydrogen fluoride gas sensor arises at the historic moment.

Sensors made of new materials can also be used in new energy vehicles. Wen Zhaoyin, chairman of the solid state ion Council of China Silicate Society and researcher of Shanghai Institute of silicate, Chinese Academy of Sciences, said: “the large-scale use of solid-state batteries made of solid-state ion conductive materials can bring vigorous development power to vehicles. All kinds of sensors made of solid ionic conductive materials can provide strong support for the safety, energy saving and environmental protection of new energy vehicles. “

Facing the opportunity of industrial development, domestic enterprises should keep rational. Jian Jiawen believes that domestic enterprises should be based on the traditional automotive sensor market, carefully judge the future trend and market capacity, and rationally arrange the development and production of various sensors for new energy vehicles to meet the market demand.

Editor in charge: Tzh

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