Application analysis of electronic technology of t

  • Detail

Application analysis of automotive engine electronic technology

Application Analysis of automotive engine electronic technology Xie juanhang (Department of automotive engineering, Zhaoqing Polytechnic College of science and technology, Guangdong Zhaoqing 526114) exhibition, which significantly improves the power, economy, safety, stability and comfort of vehicles. This paper introduces the significance of engine electronic technology, analyzes the composition of engine electronic technology and the application of each engine electronic technology, and briefly expounds the development of automotive engine electronic technology

with the increasingly stringent requirements of society for automotive energy conservation, environmental protection and safety, and the increasing requirements of people for ride comfort and driving convenience, electronization, informatization, networking and intelligence have become the development trend of automotive products. Automotive electronic information technology has become an important symbol to measure the level of a country's automotive industry. Today's cars have entered the era of electronic control. The cost of electronic devices equipped on cars will account for an increasing proportion of the cost of the whole car. Computer technology and electronic technology are widely used in automobiles, and have penetrated into almost all automotive systems, greatly promoting the development of the automotive industry. Automotive engine electronic technology is one aspect of automotive electronic technology, and its development will drive the continuous progress of automotive electronic technology

1 significance of automotive engine electronic technology automotive electronic technology is generally considered to refer to the electronization, electronic information technology and related electronic technology applied in automobiles. Automotive engine electronic technology plays an important role in automotive electronic technology. In just a few decades, the engine has become the integration of high and new technology. No matter the fuel economy, power performance, exhaust emission level and so on, it is unmatched by any other power machinery. All this comes from the role of electronic technology

2 application of automotive engine electronic technology 21 electronic ignition device (ES) electronic ignition device is to adapt to the development of the rule of law direction of automotive emission regulations, fuel consumption regulations, maintenance regulations and so on as soon as possible; In order to meet the strict requirements of the reliability, ignition energy and complex ignition advance characteristics of the automotive ignition system, advanced electronic technology must be used to improve the control accuracy of the ignition time of the automotive engine. Due to the rapid development of electronic technology, it is now possible to manufacture various electronic components including transistors with high reliability, good performance and low price

there are many kinds of automotive electronic ignition devices being developed and applied at present: from the perspective of the main electronic components that control the primary current of the ignition coil, there are transistor ignition devices, silicon controlled ignition devices and integrated circuit ignition devices. It consists of microcomputer, sensor and its interface, actuator and other parts. The device can calculate and judge various parameters of the engine sent by the sensor, and then adjust the ignition time. This can save fuel and reduce air pollution. In addition, the new engine electronic control device also has adaptive control, intelligent control and self diagnostic operation

Allan Rasmussen, the senior project manager of Lego, who has achieved significant results in environmental protection, said the results

22 electronically controlled fuel injection devices on modern vehicles, mechanical or electromechanical hybrid fuel injection systems have been phased out, and electronically controlled fuel injection devices have become increasingly popular because of their superior performance. The electronic fuel injection device can automatically ensure that the engine always works in the best state, so that it can save fuel and purify air to the greatest extent under the condition of a certain power output. The system sends part of the exhaust gas discharged by the engine back to the intake manifold and enters the cylinder again together with the fresh mixture to inhibit the generation of harmful gases in the engine. The amount of recirculated exhaust gas is automatically controlled by the exhaust gas recirculation valve. For example, the method to control the opening or closing of EGR valve: electronic control of EGR valve

The principle of idle speed control is shown in. The function of idle speed control: to realize the rapid warm-up process after the engine is started; Automatically maintain the engine at idle speed and operate stably at the target speed. The main contents of idle speed control: control after starting, warm-up process control, load change control and deceleration control

25 intelligent variable valve timing technology (WT ―) system. This device improves the intake efficiency, realizes the full output of torque in the low and medium speed range, and ensures sufficient power performance under all working conditions. Another advantage is the light weight brought by the all aluminum alloy cylinder block, which not only reduces the mass, but also reduces the noise of the engine. The main purpose of the variable valve timing control mechanism is to improve the full load performance while maintaining the idling performance of the engine. This mechanism keeps the continuous opening angle of the inlet valve unchanged and changes the opening and closing time of the inlet valve to increase the amount of inflation

― corolla VVT-i system structure diagram in order to obtain the best air-fuel ratio of the engine and enable the engine to get different fuel supply at different speeds, Toyota's intelligent variable valve timing technology is quite representative

vvt - the system is composed of sensors, EC and camshaft hydraulic control valves, controllers, etc. EC stores the optimal valve timing parameter value, which is the main development direction of energy conservation of existing building exterior walls in China at present. The feedback information such as crankshaft position sensor, intake manifold air pressure sensor, throttle position sensor, water temperature sensor and camshaft position sensor is collected into EC and compared with the predetermined parameter value to calculate the correction parameters and send instructions to control the camshaft timing hydraulic control valve, The control valve controls the position of the oil tank valve well according to EC instructions, that is, to change the hydraulic flow, and select and transmit the signal instructions such as advance, lag and unchanged to different oil passages of VVT controller. The system structure is shown in

this evening, the electronic technology used in the engine part also includes: electric oil pump, generator output, cooling fan, engine displacement, throttle timing, secondary air injection, engine supercharging, oil vapor evaporation and system self diagnosis function. They are more or less used in different models. 3. With the development of Automotive engine electronic technology, people's requirements for automotive safety, environmental protection, comfort, entertainment and so on continue to improve, Automotive electronic technology has made new breakthroughs in function diversification, system integration, volume miniaturization, system networking and so on. Automotive electronics technology has entered the stage of optimizing the overall relationship between people, cars and the environment The development of automotive engine electronic technology has played a key role in improving the performance of the whole vehicle. The development trends of automotive engine electronic control technology in the future 141 mainly include: (1) sensor technology. With the development of automotive electronics, the higher the degree of automation, the greater the degree of dependence on sensors. The diversification of automotive sensors and the increase in the number of sensors used make the sensors develop towards multi-function, integration, intelligence and miniaturization; (2) Engine electronic control unit ECU electronic control unit EC is the core component of automotive electronic control system, and the function of microprocessor should be more powerful

BASF's new two-stage tail gas post-treatment system, for example: launch a new two-stage tail gas post-treatment system for BASF. BASF pioneered the integration of four components of diesel exhaust after treatment system: denitration catalyst, diesel oxidation catalyst (DOC) soot filter and selective catalytic reduction (SCR) system. These four components are integrated into two parts: diesel oxidation catalyst (DOC)/Greek combustion condition NOx absorber (1n) and the integration of selective catalytic reduction (SCR) system and soot filter substrate

4 conclusion as the heart of a car, the engine undoubtedly has a decisive impact on the performance of a car. All kinds of engine electronic technologies introduced above are carried out around the aspects of high environmental protection, high performance, low fuel consumption and high comfort. Coupled with the continuous rationalization of car buyers today, with the continuous development of electronic technology, automotive electronic technology has been widely used in various fields of cars, and the comprehensive performance has been greatly improved, making cars in safety, energy conservation, environmental protection Comfort and other aspects have made progress. With the development of electronic technology, automotive electronic technology has developed from single component electronization to assembly electronization, networking and intelligence. Environmental protection, safety, intelligence, integration and informatization are the general trend of the development of automotive electronic technology. We have reason to believe that almost all the latest technologies of modern engines are closely combined with electronic technology, which makes engines the soul of today's high-tech products

Copyright © 2011 JIN SHI