Cummins Engine Company, Inc.

Cummins Emission Solutions Inc.

Simpson International (uk) Ltd.

Alan H Zhao

Jinqian Gong

Jeffrey Diwakar Abraham

Premjee Sasidharan

Thomas E Reinhart

Kwadwo O Owusu

Swapnali Gujar

Kapil Rajkumar Dhanwani

Thomas C Smith, Jr

Paul A Hayes

Charles E Long

Dennis R Tibbetts

Jeffrey D Saueressig

Mark A Zen Ruffinen

Kwin R Abram

A method executed by at least one server, comprising: receiving, from a first monitored system comprising an internal combustion engine and a first sensor, a first signal associated with a first occurrence and a second occurrence of an internal combustion engine event and first measurement data of the first sensor; determining a first measurement from the first measurement data and a second measurement from the first measurement data based on the first and second occurrences, respectively; determining a reference measurement; determining a first reference deviation; determining a second reference deviation; after determining the first reference deviation is less than a first reference threshold and the second reference deviation is less than a second reference threshold, determining a measurement deviation; comparing the measurement deviation to a measurement threshold; and after determining the measurement deviation satisfies the measurement threshold, determining a first exhibited useful life of the first sensor.

Systems and methods for determining exhibited useful life of sensors in monitored systems

At least one server comprising at least one processor coupled to at least one memory storing instructions. The server can receive a first signal from a first monitored system comprising an internal combustion engine and a first sensor, the first signal associated with a first occurrence of an internal combustion engine event, a second occurrence of the internal combustion engine event, and first measurement data of the first sensor. The server can determine a first measurement from the first measurement data. The server can determine a second measurement from the first measurement data. The server can determine a measurement deviation between the first measurement and the second measurement. The server can compare the measurement deviation to a stored measurement threshold. The server can determine a first exhibited useful life of the first sensor based on the measurement deviation and at least one of the first measurement or the second measurement.

An improved torsional vibration isolator assembly for an engine is provided which includes a non-linear spring device which effectively minimizes the transmission of torsional vibrations to the engine's gear train throughout all engine operating frequencies and conditions while limiting relative movement between the engine's crankshaft and crank gear so as to maintain timing error within acceptable limits. The improved torsional vibration isolator is designed to absorb torsional vibrations transmitted from the crankshaft so as to substantially isolate the entire engine gear train, including the crank gear, from the torsional vibrations throughout all engine operating conditions and frequencies, including at and below the natural frequency, i.e. crank resonance, of the crankshaft. The crank gear isolator includes resilient elements positioned in cavities formed between engaging projections formed on inner and outer rings of the assembly. The resilient elements and cavities are sized to create an expansion volume which is filled by the deforming resilient element during operation to limit further relative movement. The assembly may include a torsional vibration damper for dampening torsional vibrations transmitted from the crankshaft, especially during crankshaft resonance.

Crankshaft gear torsional vibration isolator assembly for an engine

An improved engine gear drive train arrangement is provided which effectively minimizes the crankshaft torsional vibrations at the location of the gear train, for engines with a front gear train. A flywheel is resiliently connected to the rear end portion of the crankshaft so as to resiliently connect a driven unit to the crankshaft. An extra inertial device is connected to the front end portion of the crankshaft and includes an inertia so selected as to cause a nodal point of the first torsional vibration mode of the crankshaft to be located in the vicinity of the crank gear to minimize the amplitude of torsional deflection of the crankshaft at the crank gear. Also, the device for resiliently connecting the flywheel to the rear end portion of the crankshaft may include resilient members positioned in cavities formed by engaging rings. The nodal point of the first torsional mode of the crankshaft is optimally positioned close to the crank gear by selecting an inertia for the rear mounted flywheel, an optimum inertia for the front mounted inertial device and a resilient material for the flywheel connecting device having the appropriate stiffness, so that the combination of these features achieves the desired nodal point positioning for a given engine or application.

Engine drive train having a front gear train with improved torsional

A fuel system vibration damper. A damper is affixed to the fuel system drive gear in order to counteract torsional vibration produced in the fuel system drive gear by the fuel system, such as a fuel injection system or a fuel pump. The damper additionally dampens the response of the entire fuel system drive train, thereby reducing engine noise due to gear rattle.

Fuel system vibration damper

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Columbus, IN, United States of America

Alan H Zhao