Air pump for internal combustion engine
View Patent ↗A motor and a pump in an air pump pressurizing a fuel vapor passage of a fuel vapor purge system, are disposed in a case which is partitioned into a chamber accommodating the motor and a chamber accommodating the pump, to transmit a driving force of the motor to the pump by a magnetic coupling.
1. An air pump for an internal combustion engine comprising:
a motor;
a pump driven by said motor;
an airtight structure sealing in airtight said motor from said pump, wherein said airtight structure comprises:
a case accommodating said motor and said pump; and
a partition wall partitioning said case into a space accommodating said motor and a space accommodating said pump; and
a non-contact joint transmitting power from said motor to said pump.
2. An air pump for an internal combustion engine according to claim 1 , wherein said non-contact joint is a magnetic coupling.
3. An air pump for an internal combustion engine according to claim 2 , wherein said magnetic coupling comprises a disk shaped magnet attached to an output shaft of said motor and a disk shaped magnet attached to a rotation shaft of said pump, which are disposed opposite to each other via said partition wall.