Automotive electronic products can be divided into two categories: one is on-board automotive electronic devices, such as car audio, which are not directly related to the performance of the car itself and belong to the added value of the car; The other is automobile electronic control system, such as electronic fuel injection system, anti lock braking control (ABS) system, electronic control suspension system, etc., which directly affect the performance of automobile.

As far as automotive electronic devices are concerned, there is a good development foundation in China at present. The key in the future is to further form an economic scale to reduce costs and improve competitiveness in the global market. The automotive electronic control system has the characteristics of large investment, long development cycle and great technical difficulty. Although some enterprises in China have engaged in technology R & D, it has not yet formed industrialization, so this industry has not developed.

Due to the gap in China's automotive electronic control system, a large number of automotive electronic control modules rely on imports, and the profits are earned by foreign manufacturers. For example, when foreign manufacturers supply a set of generator control system to a domestic minibus (BUN), the profit is 1000-300 yuan. If China produces 10000 minibuses, foreign manufacturers can earn 10-30 million profits. Therefore, it is imperative to carry out the independent development of automotive electronic control system.

Develop relevant electronic control system based on market demand

Because the automotive electronic control system contains a wide range of contents, which systems to start with is also a matter of concern. Domestic enterprises should choose the products to be developed according to the requirements of relevant policies and regulations, so that the products developed can have huge market prospects. Specifically, domestic enterprises can develop relevant automotive electronic control systems according to the government's requirements for automotive environmental protection, safety and energy saving. As required by the State Environmental Protection Administration, from September 1, 2004, China's gasoline vehicles must meet the emission standard equivalent to Europe II, which indicates that there is a wide market space for the electronically controlled fuel injection system of automobile engines conforming to Europe II. At present, the closed-loop control of air-fuel ratio through electronic fuel injection and three-way catalytic converter exhaust post-treatment are the most effective measures to reduce the emission pollution of gasoline engine. Therefore, the independent development of the system will have a huge market prospect.

If the future domestic laws and regulations require the ex factory vehicles to be equipped with ABS, airbag and other equipment, this market will follow.

The development of system control software is feasible

In the independent development of automotive electronic control system, Professor Yuan believes that we should focus on the development of system control software, because the experience accumulation and talent training over the years have made us have the development ability of system control software. At the same time, the development of hardware system also makes the circuit design simpler and provides higher and higher reliability.

Taking the electronic fuel injection system of automobile engine as an example, it is composed of sensor, single chip microcomputer and actuator (such as fuel injector, ignition coil, etc.).

In the past, the sensor had to "talk" with the single chip microcomputer through the conditioning circuit, and then "talk" with the actuator through the power integrated circuit. After these years of development, sensors and power integrated circuits are developing towards intelligence. The three parts can be "talked" directly. The circuit is becoming simpler and simpler, and the reliability is guaranteed by the hardware supplier. Therefore, we can focus on the independent development of system control software.

The control software is used to determine the emission performance of vehicles. The stricter the emission limit requirements are, the more difficult the software development is. The control software that meets the European II emission standard is much simpler than the control software that meets the European III emission standard, and the algorithms required by this system control software are all we can master.

The independent development of automotive electronic control system requires the synchronous development of electronics and machinery. In order to realize industrialization, the involved enterprises should pay attention to the close cooperation with the vehicle factory.