| 摘要 |
The present invention pertains to a low pressure rotary spherical air pump for supplying fresh air to an internal combustion exhaust stream to complete combustion of unburned fuel in the exhaust manifold prior to discharge of the exhaust gases in the atmosphere. The spherical air pump comprises front, center and rear pistons rotatably mounted in a spherical chamber with the front and rear pistons pivotally connected to the edges of the center piston by radially extending pins which are mounted in suitable bearing supports on the pistons. The axes of the pins are perpendicular to each other and converge at the center of the sphere and the axes of the forward and rear pistons also converge at the center of the sphere and are disposed at an angle other than 180 DEG with respect to each other so as to cause the center piston to oscillate as it rotates with the front and rear pistons. The spherical housing is provided with improved inlet and discharge ports which enable the spherical air pump to draw in, compress and discharge substantially the total displaceable volume of the pump of each revolution. Also, the front and rear pistons are provided with cylindrical seal areas to seal between such pistons and the surrounding housing.
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