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首页> 外文期刊>Journal of Mechanical Science and Technology >Fuel injection characteristic measurements under a transient injector driving condition using an injector driving algorithm
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Fuel injection characteristic measurements under a transient injector driving condition using an injector driving algorithm

机译：使用喷射器驱动算法在瞬态喷射器驱动条件下燃料喷射特性测量

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A new experimental system was developed to measure the cumulative injected fuel mass (CIFM) according to the driving time during the operation of a gasoline injector in an actual vehicle driving condition. An algorithm was developed to calculate the fuel injection timing and injection duration based on engine speed, crank position, and intake air mass data. The intake air mass and engine speed under the vehicle driving conditions were simulated using a computer. In this study, phase I of the FTP-75 mode was used as the vehicle driving mode. GT-Suite (R) was used as the computer simulation software. The engine part load data, an automatic transmission shift map, torque converter data and various vehicle specifications were used as input data for the GT-Suite (R) simulation. The computer simulation time interval is 0.05 seconds. An injector drive signal corresponding to the fuel injection amount and timing calculated by the developed algorithm was generated in a FPGA DAQ system. The drive signal from the FPGA DAQ is supplied to the base terminal of the transistor to switch the injector drive voltage source to control the fuel injection. The real-time measurement of the CIFM was done using load cells, dynamic strain amplifiers, and the FPGA DAQ system. The CIFM was measured at intervals of 0.05 seconds using an experimental apparatus developed when the vehicle was driven in the FTP-75 mode. A low-pass filter was used to remove the noise due to the impact force of the fuel jet on the load cell when measuring the CIFM. Twenty-eight repetitive measurements were conducted for an uncertainty analysis of the measurement data. A normal distribution was used as the error function. The deviation % distribution from the average CIFM value was evaluated at the 95 % confidence level. The deviation % from the average CIFM value was 3 % at 50 seconds after the start of phase I of the FTP-75 mode and converged to 0.2 % at 512 seconds.
机译：开发了一种新的实验系统，以根据实际车辆驾驶条件的汽油喷射器的操作期间测量累积注入的燃料质量（CIFM）。开发了一种算法，用于基于发动机速度，曲柄位置和进气空气质量数据来计算燃料喷射正时和喷射持续时间。使用计算机模拟车辆驾驶条件下的进气质量和发动机速度。在该研究中，FTP-75模式的阶段I用作车辆驱动模式。 GT-Suite（R）用作计算机仿真软件。发动机部件负载数据，自动变速器移位图，转矩转换器数据和各种车辆规格用作GT-Suite（R）仿真的输入数据。计算机模拟时间间隔为0.05秒。对应于由开发算法计算的燃料喷射量和定时对应的喷射器驱动信号在FPGA DAQ系统中产生。来自FPGA DAQ的驱动信号被提供给晶体管的基端以切换喷射器驱动电压源以控制燃料喷射。使用负载电池，动态应变放大器和FPGA DAQ系统进行CIFM的实时测量。使用当在FTP-75模式下驱动时，使用实验装置以0.05秒的间隔测量CIFM。在测量CIFM时，使用低通滤波器去除由于燃料射流上的燃料喷射的冲击力而导致的噪声。进行了二十八次重复测量，以进行测量数据的不确定性分析。将正态分布用作误差功能。从平均CIFM值的偏差％分布在95％的置信水平上进行评估。在FTP-75模式的阶段I开始后50秒，平均CIFM值的偏差％为3％，并在512秒时融合到0.2％。

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