Gas/air mixer for injecting fuel gas into the intake air stream of an i.c. engine

摘要

The gas/air mixer (1) includes an intake air passage (5) which has a combination of radial holes (15) and radial tubes (17) arranged so that the gas is injected into the air stream. The gas passage (7) contains gas which is at a higher pressure than the intake air. The gas flows around an annulus (13) which distributes the gas to all the radial holes (15) and radial tubes (17). The size of the intake air passage (5), the number and size of the radial holes (17), and the number, size and length of the radial tubes (15) can be varied in any combination to achieve adequate gas/air mixing for the particular engine application. This combination can even include a device that contains all radial holes, Fig.2 or all radial tubes (Fig.3). The distance that the gas is injected into the air stream is small at the radial holes (15) and larger at the radial tubes (17).