As environmental pollution, energy crisis and other global issues have become increasingly prominent, low-emission alternative fuel vehicles, electric cars and hybrid vehicles, energy-saving economy cars have emerged. They have their own outstanding advantages, but also the corresponding limitations. The compressed air powered cars (Air-powered Vehicle) is the use of high pressure compressed air acting, to promote expansion in the engine cylinder piston acting foreign output power to drive the vehicle. Not only facilitate the compressed air source, and it has a simple structure, low cost, clean and green, so many advantages; can achieve zero emissions, is a true environmentally-friendly vehicle.
This topic will LF162MK converted into a jet of compressed air by the electronic control system to control the solenoid valve pneumatic engine. Conducted based on ATmcga16 of pneumatic engine control system design, the electronic control system with flexible, fast and accurate, able to achieve real-time measurement of the pneumatic engine sensor and actuator control as well as on your PC real-time monitoring.
A pneumatic engine control system design of the overall program
Pneumatic engine control system design, including hardware and software design of two parts, the system complete the following tasks: real-time acquisition of the condition of the engine parameters: fast and accurate calculation of the characteristic parameters; real-time control solenoid valve jet timing and jet volume; to achieve real-time data communication .
Pneumatic engine control system design from the system monitoring and control capabilities, needs, according to the following requirements to design: Select the appropriate signal acquisition, use reasonable sensor to accurately reflect the state of the engine parameters; the appropriate choice of the control chip low-power high-performance components, to simplify the circuit to improve the control accuracy; modular design approach; system with anti-vibration and anti-jamming performance; drive module has good reliability and load capacity; adapt to the actual working environment of the vehicle engine.
2 pneumatic engine electronic control unit hardware design
The electronic control unit (ECU) is the core of the entire pneumatic engine control system. By the micro-control system modules, and components of the input signal processing module, the implementation of the power output and communication modules. ECU to complete the main tasks are: real-time processing of sensor data acquisition, and data collected by the A / D conversion, filtering and shaping amplified, converted into the microcontroller can read the standard signal; control worked out by mathematical calculations and logical judgment command-driven actuator (high-speed solenoid valve), the accurate control of the jet timing, and air; CAN bus real-time communications tasks, enabling the engine to maintain optimal running condition. Pneumatic engine electronic control systems architecture shown in Figure 1, including the ATmega16, signal processing circuits, power driver circuitry, communication circuits and
Sensors and actuators, respectively, completed the real-time detection, control and monitoring functions of the pneumatic engine. |
