Cummins Emission Solutions Inc.

Cummins Inc.

Ralf Rohrmueller

Friedrich Johann Zapf

Joe V Hill

Masoud Ziabakhsh Deilami

Andreas Lannig

Jens Honeck

Jakob Stang

Thomas Kreser

Christian Geiss

Jonas Hofmann

Harald Breitenbach

Thomas Betz

Kay Schmidt

Tobias Fuchs

Sebastian Weidner

Julian Nicolas Aljoscha Raupp

A dosing module for an aftertreatment system includes: a housing; a dosing cartridge removably inserted in the housing, the dosing cartridge including a needle assembly; a cover coupled to the housing, the cover covering the dosing cartridge; an inlet port inserted in the housing, the inlet port configured to receive reductant and provide the reductant to the dosing cartridge; and a filter screw coupled to the inlet port such that the filter screw is interchangeable, the filter screw including a pin, the filter screw being compressible to provide compensation for fluid expansion.

Dosing module for use in aftertreatment systems for internal combustion engines

A controller for an exhaust aftertreatment system receives a pressure signal from a pressure sensor. The pressure sensor generates the pressure signal based on a pressure of treatment fluid in a downstream dosing module. The controller further determines a pressure measurement based on the pressure signal, determines a first injection amount based on the pressure measurement, and causes an upstream injector of an upstream dosing module to inject the treatment fluid according to the first injection amount. The controller further determines a second injection amount based on the pressure measurement and a resistance of a variable resistor and causes a downstream injector of a downstream dosing module to inject the treatment fluid according to the second injection amount.

Systems and methods for controlling a dosing module

An exhaust aftertreatment system includes a first decomposition chamber that receives exhaust and treatment fluid, a first dosing module that includes a first injector that injects the treatment fluid into the first decomposition chamber, and a second decomposition chamber disposed downstream of the first decomposition chamber and that receives the exhaust and the treatment fluid from the first decomposition chamber. The exhaust aftertreatment system further includes a second dosing module that includes a second injector that injects the treatment fluid into the second decomposition chamber and a pressure sensor that generates a pressure signal based on a pressure of the treatment fluid in the second dosing module. The exhaust aftertreatment system further includes a variable resistor selectively switchable between multiple resistances.

An aftertreatment system includes an inlet exhaust section, an outlet exhaust section, a first aftertreatment component, a first dosing module, and a second dosing module. The inlet exhaust section receives exhaust. The outlet exhaust section is in fluid communication with the inlet exhaust section. The first aftertreatment component receives the exhaust from the inlet exhaust section, treats the exhaust, and provides the exhaust to the outlet exhaust section. The first dosing module is positioned along the inlet exhaust section. The first dosing module is structured to selectively dose the exhaust with reductant. The second dosing module is positioned along the outlet exhaust section. The second dosing module is structured to selectively dose the exhaust with the reductant.

A filtration assembly structured to filter reductant includes an outer housing and an inner housing. The inner housing is positioned within the outer housing. The inner housing is structured to contain the reductant and operable between a first state in which the inner housing has a first volume and a second state in which the inner housing has a second volume that is larger than the first volume, the inner housing including an end face. The inner housing is separated from the outer housing by a gap when the inner housing is in the first state. A volume of the gap decreases as the inner housing transitions from the first state to the second state and increases as the inner housing transitions from the second state to the first state.

Filtration assembly for use in aftertreatment systems for internal combustion engines

An SCR exhaust gas aftertreatment device in which a urea-water solution is injected into an exhaust gas line is provided. At least one component of the device (e.g., a filter element) lies in an area of an internal space, and is bounded by an elastomer membrane that is embedded in a frost equalization foam. This prevents freezing damage even over a very long period of time and a large number of freezing cycles.

Growing community of inventors

Faulbach, Germany

Ralf Rohrmueller