Patent ID: 8342150

Claim:
A service pack, comprising: an air compressor configured to output a compressed air to drive operation of at least one pneumatic tool; an engine configured to drive the air compressor; and a controller configured to sense a load on the air compressor, wherein the controller is configured to: selectively change an operating speed of the engine to a modified speed in response to a sensed feedback indicating a change in the load on the air compressor, the modified speed is proportional to the load, the modified speed is increased before the compressed air reaches a lower pressure threshold; and selectively change an operating state of the air compressor between engaged and disengaged states while the engine is operating at least partially based on the sensed feedback, wherein the controller is configured to progressively decrease the operating speed of the engine and subsequently change the operating state of the air compressor from the engaged state to the disengaged state in response to progressive decreases in the load, and the controller is configured to change the operating state of the air compressor from the disengaged state to the engaged state and subsequently progressively increase the operating speed of the engine in response to progressive increases in the load.