中文摘要：

针对汽车防盗，该文开发了一种密码控制的油路阀防盗系统，油路控制阀安装在汽车点火器处，密码控制器则安装在驾驶室内的操作台上。利用该控制系统，任何人进入车辆后，都必须输入正确的密码才能打开安装在油泵与汽车点火系统之间的油路控制阀，接通油路后，才能启动汽车发动机。在密码控制器中，设计了报警模块，当输入密码错误超过规定的次数后，控制器启动报警系统并同时锁定键盘。为了避免汽车意外熄火油路阀关闭切断油路以及密码控制器掉电而需要重新输入密码的麻烦，控制器的存储单元能记忆步进电机的当前位置并保持阀芯的当前开口，便于驾驶员快速重启发动机。最后利用摩托车发动机进行了实验研究，实验结果表明该密码控制油路阀系统具有很好的防盗作用。

英文摘要：

An oil valve and password controller for ear anti-theft （PCCAT） has been developed in this research. The oil valve is equipped near the fire system of car and the PCCAT is installed on the operational platform in the car. With the valve and the PCCAT, everyone who wants to drive the car must correctly input the password to open the valve installed between the oil pump and the fire system of the car to make the oil pipe connecting firstly, and then,to start the car engine. It also designed an alarm module in the PCCAT for car to start the alarm system and lock the keyboard when wrongly inputs password over the limited times. In order to avoid being abnormally powered off of the PCCAT and being cut off mistakenly the oil pipe,the PCCAT memory unit can remember and keep the position of the step motor, which could help drivers to avoid inputting password again to restart the engine quickly after engine flameout. At last, it carried out experiments with a motorcycle engine, and the experimental results proved that the PCCAT had better effects for car anti-theft.