Cummins Emission Solutions Inc.

Cummins IP, Inc.

Srinivasa Varadan Rajagopalan

Andrew Morgan Myer

Srivardhan Chandrapati

Shu Zhang

Mugdha Naik

George L Muntean

Stephen M Holl

John K Heichelbech

Wei Huang

Xin Jin

According to one embodiment, a diesel exhaust fluid purging system includes a metering valve with a supply port and a delivery port. The purging system also includes a pump assembly that is fluidly connected to the supply port of the metering valve. The pump assembly includes a pump and a single supply line that is fluidly connectable with a diesel exhaust fluid source. The purging system further includes an injection assembly that is fluidly connected to the delivery port of the metering valve. The injection assembly includes an air supply line that is fluidly connectable with an air supply source. Additionally, the purging system includes a controller in electrical communication with the metering valve, the pump assembly, and the injection assembly. The controller is configured to purge the pump assembly of residual diesel exhaust fluid using air from the air supply line.

Pump purge for urea dosing system

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

Ann Arbor, MI, United States of America

Srinivasa Varadan Rajagopalan