초록 ▼

An O-ring test apparatus for a mass air flow sensor having a lift mechanism for lifting the mass air flow sensor and its production line carrier from the production line to a test location. In the test location, a clamping mechanism clamps the mass air flow sensor to the carrier compressing the O-ri

An O-ring test apparatus for a mass air flow sensor having a lift mechanism for lifting the mass air flow sensor and its production line carrier from the production line to a test location. In the test location, a clamping mechanism clamps the mass air flow sensor to the carrier compressing the O-ring. A seal mechanism blocks one end of an air flow passage provided in the production line carrier and connects an air inlet member to the other end. The air inlet member is connected by a manifold to a source of pressurized air through a solenoid valve. A pressure sensor connected to the manifold generates at least a first pressure signal in the manifold which rises to a pressure indicating that the O-ring is properly mounted on the mass air flow sensor. A control circuit activates the lift mechanism, the seal mechanism and the solenoid valve in a predetermined sequence and generates a fail signal in the absence of the first pressure signal when the solenoid value is open.

대표청구항 ▼

An O-ring test apparatus for a mass air flow sensor mounted on a production line carrier, the production line carrier having a top surface, a well provided in the top surface which receives the sensing head of the mass air flow sensor, and a transverse air flow passage connected to the well in which

An O-ring test apparatus for a mass air flow sensor mounted on a production line carrier, the production line carrier having a top surface, a well provided in the top surface which receives the sensing head of the mass air flow sensor, and a transverse air flow passage connected to the well in which is disposed the end of the sensing head, said mass air flow sensor having an O-ring sealingly engageable with the bottom of the well, said O-ring test apparatus comprising: a lift mechanism responsive to a first signal to lift said carrier with said mass air sensor mounted thereon from a production line to a test location and responsive to a second signal to return said carrier and said mass air flow sensor to said production line; a clamping mechanism responsive to said carrier being placed in said test position to clamp said mass air flow sensor to said top of said carrier compressing said O-ring; a seal mechanism responsive to a third signal to block one end of said air flow passage with a seal member and to connect an air input member to an opposite end of said air flow passage, said seal mechanism responsive to a fourth signal to unblock said one end of said air flow passage and disconnect said air input member from said other end of said air flow passage; an air manifold connecting said air input member to a source of pressurized air; a valve connected to said air manifold between said source of pressurized air and said carrier to control the air flow through said air manifold, said valve switchable to an open position in response to a fifth signal; a pressure sensor connected to said air manifold intermediate said valve and said carrier for generating at least a first pressure signal when the air pressure in said air manifold has a first predetermined value indicating the presence of an O-ring sealing the space between said mass air flow sensor and said bottom of said well; and an electronic control for generating said first, second, third, fourth and fifth signals in a predetermined sequence and responsive to said first pressure signal to return said carrier to said production line and for generating a failure signal in response to the absence of said pressure sensor to generate said first pressure signal.