CPC F04D 25/028 (2013.01) [F04D 27/004 (2013.01); F04D 27/007 (2013.01); F04D 29/063 (2013.01); B64D 13/06 (2013.01)] | 26 Claims |
1. An apparatus for use with a vehicle, the apparatus comprising:
a fluid channel to convey a fluid;
a compressor fluidly coupled to the fluid channel;
a gearbox operatively coupled to the compressor with a shaft, the gearbox to control the compressor via the shaft with a first gear ratio and a second gear ratio different from the first gear ratio to vary a flow rate of fluid in the fluid channel; and
clutches to vary the gearbox between the first gear ratio and the second gear ratio.
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