Cummins Emission Solutions Inc.

Xin Jin

Srivardhan Chandrapati

Shu Zhang

Mugdha Naik

Yongquan Chai

Deepu Chandy

James Houghtell

Stephen M Holl

John K Heichelbech

Andrew Morgan Myer

Srinivasa Varadan Rajagopalan

A reductant delivery system is provided for delivery of reductant to an engine exhaust aftertreatment system that is heated during cold temperature conditions. A heat exchange fluid flows through a heat exchange circuit that provides a flow path from the heat source to the doser, from the doser to the reductant storage tank, and from the reductant storage tank to the heat source. A control valve controls the flow of the heat exchange fluid in the heat exchange circuit so that at least one heat exchange cycle includes a circulation period that increases the temperature of the reductant in the doser and storage tank and a termination period where circulation is stopped until reductant temperature in the doser reaches a lower limit.

Systems and techniques for heating urea injection systems

An example system includes a diaphragm pump having a suction port and a discharge port, a urea suction line fluidly coupling a urea supply to the suction port, and a urea discharge line fluidly coupled to the discharge port. A recirculation line fluidly couples the urea discharge line to the urea suction line, and has a flow regulator operationally coupled thereto. A controller is configured to interpret a prime loss condition of the diaphragm pump, and to provide a flow regulator command in response to the prime loss condition.

Diaphragm pump system having re-priming capabilities

Growing community of inventors

Columbus, IN, United States of America

Xin Jin