The society entered the information network time， the people no longer satisfy to the automobile request one kind of riding instead of walking tool， hoped the automobile is the life and the operating region one kind extends， on automobile on elephant in own office and family same work and At the same time， the automobile computerization also day by day rapidly develops， was considered is in an automobile technological development advancement revolution， the automobile computerization degree is weighs by regarding as the modern automobile level the important But along with the computer technology， the communication technology， the integrated circuit technology rapid development， take the numeral field bus as representative's scene measuring appliance， the equipment massive applications， a tedious scene segment bed sheet succinct field bus network replaces， the signaling quality also greatly enhances， the automobile also starts to march into the network In the near ten years， the user regarding automobile comfortableness， the security as well as the environmental protection and so on each performance request enhances In order to meet the need which these increase day by day， on the automobile the computer controls the electronic electric appliance equipment sharp growth， causes the automobile (is specially passenger vehicle) designs the electric appliance line arrangement to be more and more In addition， because because on the automobile each kind of electronic electric appliance meets the point insertion quantity along with it sharp increase， in the automobile travel process meets the point insertion the breakdown to create on the automobile the electronic electric appliance equipment malfunction question to be more and more In order to solve the above problem， very many new vehicle types (are specially upscale vehicle type) in the development starts widely to apply the computer network This article introduced the computer network technology in the automobile the application basic principle， elaborated the networking in the automobile interior and exterior application situation， introduced the automobile interior network characteristic and the automobile interior network standard， with emphasis narrated the control confined network CAN principal characteristic and the According to the automobile driving quality function influence division， may the automobile electronic products induction be two kinds: One kind is the automobile electronic control， including engine， chassis， automobile body electronic One kind is the vehicle carries the automobile electronic installation， including the automobile information system， the guidance system， the automobile sound and the television entertainment system， the vehicle carries the communications system， the surfer equipment and so Keywords: automotive， computer networks， local area network control， network standards
Airbag works A typical air bag system consists of two components: collision detection ignition device (or sensor)， air bag gas generator (or air bag) When the sensor activated switch， the control circuit is in working condition began and by the detection circuit to determine whether he has the collision If the signals from two sensors simultaneously， then the role will be to start the Generator and battery as the car in front is usually easy to damage the site， therefore， airbag control system are equipped with their own power to ensure that the role In determining the conditions of cast right after the airbag， the control circuit current will be sent to ignition， by rapid transient heating， the propellant containing sodium nitride In the near-explosive chemical reaction occurs rapidly at the same time， will produce much sound to nitrogen-based gas， the balloon inflated to the full state， and by a strong impact， air bags can be washed on the steering wheel cover and open fully expanded to protect the drivers head from At the same time in the process of burning propellant， ignition assy in cooled metal mesh cover can be rapid expansion of the gas， then a small balloon may be well designed exhaust vents to play gradually buffering function and to avoid the body continues hinder the move of sight after the Need of special note is the only sensor to meet certain conditions it will Airbag sensor there are many， in part， or leveraged by pendulum switch， there is the spring loaded wheel-style， in addition to products with mercury But whatever type of sensor switch， must have sufficient impact force to make switch start， while the impact force must come from the positive direction C Usually the impact force is about equal to the speed of 25-50 km around the results generated by the collision When the car by this high-speed collision， installed in the vehicle front collision sensors and the central fitted in the car safety sensors can detect the sudden deceleration speed， and this signal is passed to the airbag system， the rapid control of the computer， the computer through the analysis confirmed only after we set off airbags electric hot bag of firearms， so that a rapid expansion of air It has been calculated to be formal airbags a car crash in 01 seconds after the start of work within the microprocessor， 03 seconds， ignition start， 05 seconds， high pressure gas into air bags， 08 seconds out balloon inflated balloon within 11 seconds completely swollen， at the moment， the drivers will hit the air Visible， open or not with the impact airbag angle and impact velocity have the general turn in the car， minor collisions， side impact or rear collision， the airbags will not open， such as upgraded version of the Santana 2000 car around the front less than 30 degrees are only open when the airbag Another point， in terms of impact velocity Duiyu， airbag system in the determination of the reduction of striking speed of the vehicle is， therefore， in security， collision experiment， generally are not so Che straight Di Yi Dong and can not hit the Qiangshang Bianxing
