SPEED CHANGE SHOCK REDUCING DEVICE FOR VEHICLE ON WHICH AUTOMATIC TRANSMISSION IS MOUNTED

摘要

PURPOSE:To reduce a speed change shock tending to increases as engine output increases by making ignition timing of the engine different from the normal one in speed change operation of an automatic transmission so as to reduce the engine output. CONSTITUTION:Since a solenoid 18b is energized in speed change operation, a solenoid valve 18 is opened. Thus, a vacuum diaphragm 14 has a chamber 14a introduced the atmospheric pressure from an air filter 9 in the speed change so that a rotational angle theta of a breaker base 13 is made zero. Thus, ignition timing of the engine is delayed to the extremity in which engine running does not yet produce any troubles so that the output of the engine is reduced and a speed change shock can be reduced.