Caterpillar Inc.

Satya Ramakrishna Manda Venkata Naga

Kevin L Martin

Andrew Michael Denis

Paul Arthur Zwart

Jayaraman Krishnapura Venkataraghavan

James Harris Mutti

Shivsinh Hitendrasinh Parmar

Purna Chander Nalla

Yongxiang Li

Abhinash Reddy Konatham

A nozzle including a first end and a second end. The first end includes at least a first inlet and a second inlet and the second end includes a plurality of outlets. An exterior surface extends from the first end to the second end of the nozzle. A plurality of vanes are disposed on the exterior surface and extend from the first end to the second end of the nozzle. A plurality of channels form along the exterior surface of the nozzle.

Reductant nozzle with helical channel design

A nozzle including a first channel, a second channel annularly disposed around the first channel, and a plurality of third channels fluidly connected to the second channel. The nozzle includes an interior cavity having a first inlet fluidly connected to the first channel and a plurality of second inlets. Individual second inlets of the plurality of second inlets fluidly connect to individual third channels of the plurality of third channels. The interior cavity includes an outlet and an impinging surface located opposite the first inlet.

Reductant nozzle with radial air injection

A nozzle including an interior cavity, a structure disposed within the interior cavity, a first channel fluidly connected to the interior cavity, one or more second channels fluidly connected to the interior cavity, and one or more outlets coupled to the interior cavity. The structure includes a bottom impinging surface that is at least partially concave, one or more legs that support the bottom impinging surface, and a top surface located opposite the bottom impinging surface.

Reductant nozzle with concave impinging surface

A nozzle including an exterior surface extending between a first end and a second end of the nozzle. The exterior surface including spray outlets disposed at the second end. An interior cavity is disposed interior to the exterior surface. A first channel and a second channel fluidly connect to the interior cavity. One or more third channels fluidly connect between the interior cavity and an individual spray outlet of the spray outlets. The one or more third channels rotate about a longitudinal axis of the nozzle and angle in a direction away from the longitudinal axis of the nozzle.

Reductant nozzle with swirling spray pattern

A reductant dosing system is disclosed as having a pump, and suction, discharge, and return passages. The system may also have a return valve, an air passage, and an air valve. The system may additionally have an air passage pressure sensor, a discharge passage pressure sensor, and a controller. The controller may be configured to calculate a first average pressure inside the discharge passage while the pump is off, the air valve is open, and the return valve is closed; and calculate a second average pressure inside the discharge passage while the pump is off, the air valve is open, and the return valve is open. The controller may also be configured to determine a pressure drop inside the discharge passage based on the first and second average pressures, and to determine that priming is successful based on the pressure drop and pressures of the discharge and air passages.

Air-assist dosing system having priming detection

A mixer is disclosed for use in a fluid injection system. The mixer may have an impingement floor oriented generally perpendicular to an intended fluid injection direction and generally parallel with a flow direction. The mixer may also have a first side wall connected along a lengthwise edge of the impingement floor and generally parallel with the flow direction, and a second side wall connected along an opposing lengthwise edge of the impingement floor and generally parallel with the flow direction. The mixer may further have at least one shelf extending between the first and second side walls and generally parallel with the flow direction. The at least one shelf may have a plurality of vanes protruding toward and away from the impingement floor that promotes mixing of an injected fluid.

Growing community of inventors

Dunlap, IL, United States of America

Satya Ramakrishna Manda Venkata Naga