Cummins Inc.

Cummins Engine Company, Inc.

Norman H Goris

Wayne A Eckerle

Tamas Rauznitz

John K Awad

Hemi Sagi

Kyle Lee Edwards

A rate tube measurement system for measuring injected fuel and a method thereof are disclosed. In one embodiment, the system includes a fixture assembly, a rate tube fluidically connected to the fixture assembly to receive fuel injected by the fuel injector during, a pressure sensor positioned upstream of the rate tube that is adapted to measure pressure changes in the injected fuel and provide a pressure output, a flow meter that measures flow of injected fuel and provides a flow output indicative of the measured fuel flow, and a computing device that processes the duration of actuation, the pressure output and the flow output to determine injection information such as fuel injection quantity, variation, and rate shape.

Rate tube measurement system

A real-time mass flow measurement system that accurately measures fuel mass delivered to each cylinder per stroke of an injection pump or a fuel injector in an internal combustion engine. In accordance with preferred embodiment of the present invention, the mass flow measurement system and method includes a fuel measuring device that measures fuel delivered by one of the plurality of fuel injectors or fuel pumps. The preferred embodiment also includes a fuel transfer circuit for directing fuel flow to the fuel measuring device and a plurality of fuel diverting devices positioned along the fuel transfer circuit for diverting fuel flow from the plurality of fuel injectors or pumps into the fuel transfer circuit and a fuel routing device positioned along the fuel transfer circuit for routing the diverted fuel flow to either the fuel measuring device or a fuel drain. The mass flow measurement system further includes a data acquisition system including a digital computer and a flow controller for controlling the fuel routing device. The digital computer includes a software program for receiving operator input data, controlling the fuel diverting devices and obtaining measurement data from the precision bore cylinder. The flow controller includes discrete logic components for generating signals to control the fuel routing valve thereby providing consistent timing control.

Real-time mass flow measurement

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Nashville, IN, United States of America

Norman H Goris