Patent ID: 7025572

Claim:
A compressor, which is driven by a driving power source, comprising: a housing; a pump mechanism housed in the housing for drawing and disengaging fluid; a pump work altering mechanism attached to the housing for altering pump work of the pump mechanism; and an electric circuit unit attached on the housing and including: a sensor for detecting a signal indicating pump torque of the pump mechanism; a torque operating circuit for processing the detected signal of the sensor and outputting an operated signal; a control circuit for controlling the pump work via the pump work altering mechanism; and a communication circuit for communicating with both a control device, which is disposed separately from the compressor, and the torque operating circuit, wherein the communication circuit communicates with the control device for transmitting the operated signal of the torque operating circuit and receiving a command signal to control the pump mechanism via the pump work altering mechanism, and the control circuit controls the pump work via the pump work altering mechanism based on the operated signal of the torque operating circuit, and wherein the communication circuit communicates according to a vehicle data communication protocol.