Abstract: A motor drive and method to control a motor in a fluid system. The method may comprise determining a pressure; determining a proportional error as a limited difference between the pressure and a pressure setpoint; determining an integral step as a limited proportional error; determining an integral error as a limited sum of the integral step and a preceding unbound integral error; determining an error as the product of the integral error, the proportional error, and a gain factor; and generating a control signal to cause the inverter to output a motor voltage to drive the motor and maintain the pressure about the pressure setpoint.

Abstract: A motor drive and method to control a motor in a fluid system. The method may comprise determining a pressure; determining a proportional error as a limited difference between the pressure and a pressure setpoint; determining an integral step as a limited proportional error; determining an integral error as a limited sum of the integral step and a preceding unbound integral error; determining an error as the product of the integral error, the proportional error, and a gain factor; and generating a control signal to cause the inverter to output a motor voltage to drive the motor and maintain the pressure about the pressure setpoint.

Abstract: A urea strainer includes a mesh for removing impurities from urea passing therethrough and heatable wires to heat the urea as it passes through the mesh. The urea is provided to an emission control system of a diesel engine.

Abstract: A motor vehicle cruise control in which the control gain is relatively high in the normal mode of operation and relatively low in the resume and acceleration modes of operation. In the normal mode of operation, a position command for an engine throttle actuator is retrieved from a high gain look-up table as a function of the vehicle speed error. In the resume and acceleration modes of operation, the position command is retrieved from a low gain look-up table as a function of the vehicle speed error. Changes in the position command at transitions between the low gain and high gain tables are eliminated through a suitable offset of the speed error used in the position command look-up, thereby assuring a smooth transition between the normal mode and the resume or acceleration modes.

Abstract: In a motor driven automotive cruise control system, the engine throttle is progressively released upon actuation of the vehicle service brakes to avoid objectionable pedal slap noise. The release is initiated by the electric motor, which drives the engine throttle toward its closed (rest) position while maintaining engagement of a clutch connected therebetween. If the duration of the brake actuation exceeds a reference interval sufficiently long as to indicate potentially significant braking effort, the clutch is immediately disengaged to return the throttle to its closed position without further delay. If the duration of the brake actuation is less than the reference interval, engagement of the clutch is maintained until the motor has returned the throttle to its closed position.