Various aspects of the present disclosure are directed to a test bench and methods for carrying out a test run on a test bench. In one example embodiment, a test run method includes: connecting a test object to a load machine, specifying a target torque for a torque controller by a test bench automation unit according to the test run, adjusting an actual torque of the load machine by the torque controller, specifying a test object control variable for the test object by a test object controller, determining an actual rotational speed of the load machine, determining at least one deviation of at least one attribute of the actual rotational speed from at least one threshold value, and based on the at least one deviation, and determining at least one additive torque correction value and superimposing the at least one additive torque correction value on the target torque.

Disclosed is a method for estimating a level of corrosion of an injector of an engine, the engine including a reference injector and at least one other injector, each injector including a tip in fluidic communication with a combustion chamber specific to each of the injectors, the respective combustion chamber of each injector also being in fluidic communication with an exhaust system of the engine. The method includes: while the engine is stopped, inhibiting a propagation of the gases from the exhaust system toward the tip of the reference injector; determining a static flow rate of an injector and a static flow rate of the reference injector; and estimating a level of corrosion of the injector by comparing the static flow rate of the injector with the static flow rate of the reference injector.

An internal combustion engine for neutron diffraction analysis is provided. The engine includes an elongated piston chamber formed from an aluminum alloy to ensure maximum neutron visibility into the combustion chamber. An elongated piston assembly reciprocates within the elongated piston chamber, the piston assembly including an upper piston joined to a lower piston. The upper piston and the lower piston are hollow, thereby reducing the reciprocating mass and increasing neutron access to the combustion chamber. The upper piston is lubricated with a neutron-transparent fluorocarbon lubricant such as perfluoropolyether (PFPE), while the lower piston and the crankcase are lubricated with hydrocarbon lubricant. The engine enables 3D and time-resolved measurements of strain, stress, and temperature, as well as phase transformation, texture, and microstructure.

An engine oil filler cap for monitoring an internal combustion engine comprises: a processor; and a sensor module comprising a pressure sensor configured to sense crankcase pressure of the internal combustion engine and to output data representative of the sensed crankcase pressure to the processor. The engine oil filler cap is configured to provide a housing for the processor. The processor is configured to determine a value representative of the firing frequency of the internal combustion engine based on the output data.

A diagnosis apparatus is applied to an in-line three-cylinder internal combustion engine, and includes a diagnosing unit and an angular acceleration derivation unit. The diagnosing unit is configured to execute a diagnosis process for diagnosing whether there is a compression leak in any one of cylinders while the internal combustion engine is in steady operation. The angular acceleration derivation unit is configured to derive an angular acceleration of a crankshaft of the internal combustion engine. The diagnosing unit is configured to, in the diagnosis process, when an amount of change in the angular acceleration per a predetermined period during an expansion stroke of any one of the cylinders is less than or equal to a threshold amount of change, diagnose that there is a compression leak in the any one of the cylinders.

A fuel control system obtains a measured amount of fuel consumed by an engine and one or more corresponding operating parameters of the engine and determines a fuel consumption modeled amount based at least in part on a fuel consumption model of the engine and the one or more operating parameters. The fuel consumption model associates different amounts of fuel that, when supplied to the engine, generate corresponding designated outputs of the engine. The system also determines one or more differentials between the measured amount of fuel and the modeled amount and, responsive to the one or more of the differentials exceeding a threshold value, the system identifies one or more components of the powered system that contribute or cause the one or more differentials and/or changes an amount of fuel supplied to the engine according to the fuel consumption model to obtain a desired output of the engine.

The purpose of the present invention is to provide a device for controlling a dynamometer of a test system, wherein the device is capable of controlling shaft torque to a prescribed target torque while minimizing low-frequency-range resonance caused by viscous drag of a test piece. This test system is provided with a dynamometer joined to an engine via a coupling shaft, an inverter for supplying electric power to the dynamometer, a shaft torque meter for detecting the shaft torque produced in the coupling shaft, and a dynamometer-controlling device 6 for generating a torque-current command signal T2 that is sent to the inverter and is generated on the basis of a shaft torque detection signal T12 from the shaft torque meter. The dynamometer-controlling device 6 is provided with an integrator 62 for integrating the difference between the shaft torque detection signal 12 and a shaft torque command signal T12ref, and a phase lead compensator 63 for accepting an output signal from the integrator 62 as an input and performing a phase lead compensation process that uses constants (a1, b1) that are dependent on the viscous drag of the test piece. An output signal from the phase lead compensator 63 is used to generate the torque-current command signal T2.

In this control apparatus design method, a feedback control system comprises a generalization plant including a nominal plant N representing the input/output characteristic of an object to be controlled and a fluctuation unit Δ for making at least one model parameter included in the nominal plant N fluctuate, and a controller for applying input to the generalization plant P on the basis of output from the generalization plant P. The controller is designed so as to satisfy a prescribed design condition. The nominal plant N comprises a nominal value multiplication unit for multiplying an input signal η by a nominal value for the model parameter and an addition unit for adding a fluctuation output signal from the fluctuation unit Δ and an output signal from the nominal value multiplication unit. Further, the fluctuation unit Δ generates the fluctuation output signal using a mapping Δp obtained from a Cayley transform of unbounded complex fluctuation Δg.

A pressure sensing system and method for an engine of an aircraft include a transceiver assembly coupled to a portion of the engine, and a pressure sensor assembly coupled to a fan blade of the engine. The transceiver assembly is configured to transmit a first signal at a first frequency and a second signal at a second frequency that differs from the first frequency. The pressure sensor assembly is configured to receive the first signal and the second signal and transmit a third signal at a third frequency that is a difference between the first frequency of the first signal and the second frequency of the second signal. The transceiver assembly is configured to receive the third signal at the third frequency. A pressure in relation to the engine is determined based on the third signal.

Disclosed is a method and a system for stimulating and communicating with floral objects. The system includes a base unit for communicating with the floral objects to read and stimulating physical and biological properties, and an electronic circuitry configured to be placed in reach of the floral objects. The electronic circuitry is capacitively coupled to the base unit and the floral objects. The base unit is able to create and communicate stimulated patterns to stimulate growth, biological properties of the floral object. The base unit generates stimulated pattern on receiving information and data from the electronic circuitry.