Razvoj naprave za kalibracijo tlačnega tipala za motorje z notranjim zgorevanjem

KRAGELJ, SIMON (author), Miljavec, Damijan (mentor)

V magistrskem delu je opisan razvoj naprave za kalibracijo tlačnega tipala, integriranega v svečki za hladen zagon dizelskega motorja (PSG). Magistrska naloga vključuje analizo signala naboja, generiranega na piezo elementu, ki se prek integriranega vezja z mikroprocesorjem in kompenzacijskim algoritmom pretvarja v izhodni napetostni signal, sorazmeren tlaku v valju motorja. Predstavljena je problematika delovnega okolja tipala, ki bistveno oteži doseganje zahtevane natančnosti, in potrebe po zagotavljanju velike količine izdelkov, kar dopušča le zelo kratke čase izdelave. Da bi dosegli ustrezno natančnost, moramo podrobno poznati odziv tipala na tlačne, temperaturne, vibracijske in druge dejavnike. V ta namen smo izhajali iz preizkusov na motorju, tako da smo signal iz PSG-ja primerjali z referenčnim tlačnim tipalom.

• Language: Slovenian
• Keywords: Tipalo tlaka, kalibracija, tlačni pulzi, analiza, svečka PSG, dizelski motor, ASIC
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2019
• PID: 20.500.12556/RUL-108585
• Publication date in RUL: 08.07.2019

Secondary language

• Language: English
• Title: Development of calibration device for pressure sensor in internal combustion engines

Abstract

The thesis describes the development of a calibration device for a pressure sensor integrated in a glow plug for diesel engine cold start (PSG). The work involves analyzing the signal from a charge generated on a piezo element that is converted to an output voltage signal proportional to the pressure in the cylinder of a motor using an integrated circuit with a microprocessor and a compensation algorithm. The problems of the sensors working environment are presented, which significantly impedes the achievement of the required accuracy, while at the same time it is necessary to provide large quantities of products, which allows only very short production times. To achieve proper accuracy, a detailed knowledge of the response of the sensor to pressure, temperature, vibration and other factors is required. For this purpose, we proceeded from tests on the engine, so that the signal from PSG was compared with the reference pressure sensor.

• Keywords: Pressure sensor, calibration, pressure pulses, analysis, PSG glow plug, diesel engine, ASIC