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Showing 1 to 20 of 30 for “"crankshaft"”.
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Collision Analysis of the Reversible Crankshaft Mechanism in a Convertible Refrigeration Compressor
… compressor when the direction of rotation of the crankshaft is reversed. The linkage accomplishes this by reducing the throw of one cylinder to zero. Of interest are the conditions to which this linkage is subjected when the direction of rotation is again reversed, causing the compressor to return …
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A comparison of the stresses in the crankshaft of an internal combustion engine as determined by using electrical resistance strain gages and by analytical methods
… with which the analytical methods used in crankshaft design would predict the actual operating stresses in the crankshaft of an internal combustion engine, electrical resistance strain gauges were applied to the accessible parts of the crankshaft of a single-cylinder gasoline engine to …
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An Efficient Knapsack-Based Approach for Calculating the Worst-Case Demand of AVR Tasks
… are real-time tasks that are released when the crankshaft arrives at certain positions in its path of rotation. This makes the rate of release of these jobs a function of the crankshaft's angular speed and acceleration. In addition, several properties of the engine triggered tasks like the …
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Modellazione e simulazione di sistemi meccanici ad elevato numero di gradi di libertà mediante metodi non convenzionali e sistemi CAD
… of the diesel 1900 cc engine with an optimized crankshaft, that employ a special steel, 300M, and that is verified for the aircraft requirements. Another version with an augmented stroke and with a total displacement of 2500 cc has been examined; the result is a 30% engine heavier. The last …
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Fault diagnosis and prediction in reciprocating air compressors by quantifying operating parameters
… which are based on the machine construction, crankshaft dynamics, and load torque measurements, are presented to determine the machine parameters. A personal computer based system used to measure the quantities necessary to solve for the machine parameters and the quantities used to compare …
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Preliminary design of twin-cylinder engines
… and moments for each angular position of the crankshaft. Different configurations of single-cylinder and twin-cylinder engines (including in-line or boxer, in-phase or out-of-phase motion of the piston) are considered. All of these configurations are characterized by their own set of forces …
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Multi-fuel operation of modern engines; on board fuel identification
… based on the measurement of the instantaneous crankshaft speed and engine dynamics could be a convenient solution.</p> <p>Several such methods have been elaborated at the Center for Automotive Research (CAR) in the Mechanical Engineering Department at Wayne State University. Each of these …
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Development of an efficient 3-D CFD software to simulate and visualize the scavenging of a two-stroke engine
… engine with moving piston and rotating crankshaft. Due to the high temperature in the cylinder after combustion, a temperature dependent treatment of the material constants is necessary. <br>Adaptive local time-stepping and dynamic local mesh adaption, as well as parallelization of the …
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Modeling of piston pin lubrication in internal combustion engines
… the linear force on the piston to rotate the crankshaft that is the eventual power outlet of the engine. The interfaces between the piston pin and the pin bore as well as the connecting rod small end are one of the most heavily loaded tribo pairs in engines. Piston pin seizure still occurs …
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Two-stroke linear engine
… The elimination of the connecting rod and crankshaft can improve the efficiency of the engine significantly and the reduced weight and cost are added advantages. A linear, crankless, internal combustion engine prototype has been developed for electrical power generation in combination with …
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Intricate dynamics and hydrodynamic frictional losses of the piston-ring assembly in internal combustion engines
… considers the interconnected motions of the crankshaft, the connecting-rod, the piston (both primary and secondary motions), and the ring-pack using a multi-body dynamic approach. Curved beam Finite Element method for Timoshenko beams was used to account for the longitudinal and in-plane …
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Engine lubrication oil aeration
… that separates the oil sump from the rotating crankshaft, were tested. Testing revealed that within the tolerance of the Air-X machine, the extent of the windage tray open area has no significant affect on the aeration level.
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An investigation of the structurally induced acoustic field in a car passenger compartment
… with the second order component of the engine crankshaft out of balance forces. This limits the frequency range of interest to below 200 Hz. Firstly, the acoustic modes of a Rover Metro passenger compartment are predicted using the finite element method. A new method for the experimental …
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Enhanced engine efficiency through subsystem lubricant viscosity investigations
… the predominantly hydrodynamic nature of the crankshaft bearings and piston assembly. A split lubrication configuration addressed this, using a 15W-40 oil in the cylinder head, and a 1OW-30 oil in the crankcase, yielding 6% lower overall friction and 3% higher mechanical efficiency over the …
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Heat Engine Driven by Shape Memory Alloys: Prototyping and Design
… of a set of SMA wires stretched between two crankshafts, synchronized to rotate in the same direction. Cranks on the first crankshaft are slightly longer than cranks on the second. During operation, the engine is positioned between two distinct thermal reservoirs such that half of its wires …
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Engine modelling for virtual mapping. Development of a physics based cycle-by-cycle virtual engine that can be used for cyclic engine mapping applications, engine flow modelling, ECU calibration, real-time engine control or vehicle simulation studies.
… engines starting by a complete dynamics crankshaft mechanism model which forms the base of the complete engine model. This system is modelled taking into account the possibility of a piston pin offset on the mechanism. The derived Valvetrain model is capable of representing a variable …
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High-speed video observation and on-line measurements of oil aeration in an internal combustion engine
… Oil droplets were observed to depart the crankshaft at approximately the tangential velocity, pass through drainage gaps in the windage tray, and strike the free surface of the oil. The rhythmic pulsation of oil droplets on the free surface caused the surface to slosh at the frequency of …
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Shaking and Balance of a Convertible One- and Two-Cylinder Reciprocating Compressor
… of angle, force, and torque for balancing of the crankshaft to achieve objective (3) is determined.
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An Experimental Study of Two-Stroke Cyclic Variation and a Prototype Component Design for Controlled Auto Ignition.
… the cylinder pressure to a resolution of one crankshaft degree for hundreds of consecutive cycles on a contemporary 2-stroke engine under the sub optimal running conditions. This will provide data with a depth and detail not currently available to the author in the academic literature. In …
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Dynamic modelling of compression ring conformability in high performance engines
… is then translated to rotation through the crankshaft to generate work. During combustion the gasses will try to move past the piston and into the crankcase, to deter this from occurring piston rings are introduced. Thus rings are designed to be in tight contact to the cylinder wall, and is …
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