SOLENOID VALVE DRIVE MECHANISM

• Main Authors: YUKAWA HOSHO, KADOWAKI CHIKA, SHIRAKI KATSUYOSHI
• Format: Patent
• Language: English
• Published: 15.06.2006
• Subjects: ACTUATING-FLOATS; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COCKS; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; TAPS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

PROBLEM TO BE SOLVED: To provide a solenoid valve drive mechanism surely detecting load short circuit of a solenoid composing a solenoid valve. SOLUTION: Count is started at detection timing of rising edge of energizing signal Pi or peak drive signal Pj2 (turn on of transistors Ti, Tj2) and is stopped at detection timing of a drop edge of peak drive signal Pj2 (turn off of the transistor Tj2). Consequently, a count value corresponding to rise time t1 from start of energizing the solenoid Li to achievement of peak value Ia in energizing current Id is obtained. Since as inductance of energizing route including the solenoid Li gets lower, rise and drop of wave form of energizing current Id flowing in the solenoid Li get earlier, load short circuit (drop of inductance) can be detected from change of the count value (rise time t1). COPYRIGHT: (C)2006,JPO&NCIPI