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Numerical simulation models of high pressure common rail fuel system were established, the influences of nozzle hole diameter and nozzle hole number on injection rate were studied by means of these models. The research results show that software simulation technology is an effective method for simulation calculation and optimization design for high pressure common rail fuel system(HPCRFS) and comparison...
Geometry model, as a mapping on physical space to calculating space, is a foundation of numerical simulating. Aiming at a complicated object, reverse engineering technology was applied to model cylinder head. Using Pro/Engineering modeling software, inlet port, outlet port, up water jacket and bottom water jacket geometry bodies were modeled one by one. Finally, by Boolean calculation, a cylinder...
The At-Speed Current testing (IDDA) is adopted to detect faults for analogue circuits in this paper. The scheme of IDDA for analogue circuits is proposed that an input vector pair (V0,V1) repeats k times is applied to circuits under test enable a low-cost ATE or a waveform sensor to measure the average current or the current waveform. And a fault localization method for analogue circuits based on...
The universal test bench for diesel hydraulic governor using hardware-in-loop simulation technology is established. The problems of common in use, variable-speed drive, simulation model, data acquisition and analyzing are solved. The structure of the test bench, along with the hardware and software meeting the requirement of deterministic real-time performance are introduced. Some experimental results...
In this paper, the control methods of common rail pressure by regulating rate of entering flow are studied. The control circuit and solenoid valve are trial-manufactured. The pressure of common rail controlled by trial-manufactured solenoid valve are tested in test-bed. The results show that The opening time of Trial-manufactured solenoid valve is 1.1 ms, and its closing time is 0.9 ms. it can satisfy...
Long-playing, the simulation of the high-capacity lead-acid battery is very difficult. Basing on the particular research upon the characteristic of the submarine battery discharge process, at the same time in view of the electrochemistry mechanism complexity of the lead-acid battery, a new algorithm which is the integration of the improved BP neural network algorithm by adding the item of the momentum...
The configuration and working principle of dual pressure common rail system (DPCRS) were introduced. In order to promote the performance of the DPCRS, a magnetostrictive actuator was designed. The finite element model of the actuator's magnetic field was built up, the influence of control rod material on the distributing of the magnetic field was calculated, then experiment study was done. The results...
The simulation of the submarine battery charge process is an important part of the submarine battery modeling, which is especially a firm foundation for the further optimization usage of the modules of the whole submarine power system. In this paper, the modeling strategy of the submarine battery charge process is discussed in detail firstly, in succession an integrated algorithm in which both the...
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