| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: no-contact switch system of internal combustion engine (ICE) electric starter of vehicle consists in electric starter motor (1), clutch (12), ignition key (11), reducing gear (7), electromagnetic clutch (8), battery (14), main (2) and subsidiary (4) thyristors, capacitor (3), resistor (5), switch (10) with spring (15), pulse source (9), bypass diode (6) and pulse transformers (16, 17). Electric starter motor switching is performed by sending of positive pulse to main thyristor control electrode. Note that main thyristor (2) is unlocked and battery (14) voltage is sent to electric starter motor (1) and electromagnetic clutch (8). Capacitor (3) is charged through main thyristor (2) and resistor (5). To switch electric starter motor (1) off positive pulse is sent to subsidiary thyristor (4) control electrode through transformer (17). Note that subsidiary thyristor (4) is unlocked and charged capacitor (3) voltage is fed to main thyristor (2) that is locked and the current in electric starter motor (1) circuit is interrupted. Then capacitor (3) charging subsidiary thyristor (4) is locked by itself. ^ EFFECT: elimination of mechanical contact at electric starter motor switching. ^ 1 dwg |
