Achieving Balanced Design of Transmission Gears for Bending Life, Contact Life and NVH for Agricultural Tractor Applications
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As one of the most fuel-efficient diesel locomotives in the world,HXN3diesel locomotive can track more wagons with less fuel and lower emission.But the substantial noise and of HXN3locomotive cab will provide less crew comfort,more equipment and manufacturing cost.The paper will analysis the vibration of the cab,and optimize the vibration isolation system.
Diesel locomotive
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Harshness
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A new 1.6 | diesel engine has been launched to enhance the competitive power of Hyundai/Kia Motors’ C-segment vehicles. This engine provides 84.6 kW of maximum power, 255 Nm of torque over a wide engine speed range and has a homologated fuel consumption of 4.7 l/100 km. In parallel to these achievements, noise, vibration and harshness (NVH) characteristics were optimised by both collaborated structural analysis of the powertrain and refined calibration of the injection parameters.
Harshness
Powertrain
Engine power
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The NVH performances of JETTA convertible-fuel car using gasoline or LPG as fuel were experimentally investigated. The vibration levels of the engine block and the driver seat as well as the interior noise level of the car and under the engine hood were measured under the constant speed as well as the uniform acceleration of the car and uniform acceleration of the engine with the standing car respectively. The test results showed that at constant speed the engine block vibration of the engine using LPG is lower than that using gasoline, but the noise level of LPG fuel is higher than gasoline. When the car is accelerating, the noise level corresponding gasoline is higher than LPG at low engine speeds, but the result is reversed at high engine speeds.
Convertible
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Presently, there is a tremendous pressure on the automotive OEMs to help reduce environmental pollution by reducing the tail pipe emissions. One of the major challenges faced by the Indian automotive OEMs, while meeting the upcoming BSVI emission regulations is the increase in product complexity and cost due to the addition of components such as urea tank, DPF and other miscellaneous engine components. It is seen in the recent past that, Indian government is making favorable moves in promoting the Electric Mobility and so most of the OEMs are presently working on converting their IC Engine powered vehicle platforms to Battery Powered vehicles. The present work focusses on experimental Noise Vibration and Harshness (NVH) studies on electric powered and IC Engine powered passenger vehicles. Though, there is a significant reduction in forcing functions in the Electric Vehicle (EV) due to the elimination of many sub-systems namely, IC Engine, multispeed transmission, intake and exhaust systems and center bearings, elimination of IC engine will expose the passengers to many of the secondary noises that were previously masked but will now annoy the occupant. The major noise sources in EV are motor noise, wind noise, tire/road noise, HVAC noise, battery cooling noise, squeaks & rattles, ancillary system noises and other unknow noise sources that were not apparent in the IC engine powered vehicles. In the present work, a comparative study (IC Engine versus EV) on the vehicle level NVH characteristics is performed and the strategies for EV - NVH reduction are discussed. A Methodology for "NVH Target Setting "while Converting IC Engine Powered Vehicle to EV is proposed.
Harshness
Original equipment manufacturer
Powertrain
Automotive engine
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The aim of the paper is to assess the impact of engine power and shifting mode on the parameters of a tractor used in transport operation. To meet the objective, measurements were performed with three tractors of the Case IH product line with different maximum power and with the same trailer and load that crossed a track with 21,8 km of distance. The record files saved following values: altitude, time of trip, tractor velocity, hour fuel consumption, engine speed, actual engine torque, fuel temperature, and position. The measurement results clearly show the unsuitability of aggregation of a tractor in higher performance category, resulting in the increase in its fuel consumption does not increase performance. To improve the utilization of powerful tractors, it is necessary to reduce their weight and aggregate them with more axles on the trailers in order to better use the potential power caused by possibility of more load.
Tractor
Engine power
Trailer
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The authors of this paper determined in a field measurement how the change of the tractor engine power in a tractor-trailer combination affects the diesel fuel consumption related to the unit of transport output (l/tkm) and the transport performance (t/h) in the conditions of a mountainous region. Transport combinations (tractor - trailer) were compared that were formed by a tipping trailer connected to three tractors with different engine powers when passing allong a route with the gradient of 0°-5.5°. It is obvious from the results of these measurements that the diesel fuel consumption differed by up to 27% in individual combinations. The lowest specific consumption on the measured route was found in the combination with the tractor with the engine rated power of 50 kW (0.037 to 0.077 l/tkm), the highest consumption with the tractor with the rated engine power of 114 kW (0.056 to 0.093 l/tkm). The lowest transport performance on the measured route was found in the combination with the tractor with the engine rated power of 63 kW (19.37 t/h), the highest performance with the tractor with the rated engine power of 114 kW (43.42 t/h).
Tractor
Trailer
Engine power
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Attempts to solve the problem of transmitting high engine power to the drawbar have resulted in a variety of tractor designs. Measured rates of work on two- and four-wheel drive tractors and a tracklayer showed that while the four-wheel drive had the highest output, the tracklayer was more efficient for heavy draught operation. The two-wheel drive machine has a higher rolling resistance than the four-wheel drive and methods of measuring rolling resistance are described. The paper discusses the reasons that different performances are obtained from two- and four-wheel drive vehicles of the same engine power, and highlights some of the advantages to be gained. Previous theoretical work on two- and four-wheel drive tractor performance and on transmissions for four-wheel drive is also discussed, together with practical limitations on tyre size for operation under certain conditions. A small survey to measure tyre and track wear is described and a method is suggested of relating tyre wear to work done by quoting tyre costs per gallon of fuel used. The paper concludes with a few comments on soil compaction.
Tractor
Drivetrain
Engine power
Gear ratio
Rolling resistance
Gallon (US)
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Бұл зерттеужұмысындaКaно моделітурaлы жәнеоғaн қaтыстытолықмәліметберілгенжәнеуниверситетстуденттерінебaғыттaлғaн қолдaнбaлы (кейстік)зерттеужүргізілген.АхметЯссaуи университетініңстуденттеріүшін Кaно моделіқолдaнылғaн, олaрдың жоғaры білімберусaпaсынa қоятынмaңыздытaлaптaры, яғнисaпaлық қaжеттіліктері,олaрдың мaңыздылығытурaлы жәнесaпaлық қaжеттіліктерінеқaтыстыөз университетінқaлaй бaғaлaйтындығытурaлы сұрaқтaр қойылғaн. Осы зерттеудіңмaқсaты АхметЯсaуи университетіндетуризмменеджментіжәнеқaржы бaкaлaвриaт бaғдaрлaмaлaрыныңсaпaсынa қaтыстыстуденттердіңқaжеттіліктерінaнықтaу, студенттердіңқaнaғaттaну, қaнaғaттaнбaу дәрежелерінбелгілеу,білімберусaпaсын aнықтaу мен жетілдіружолдaрын тaлдaу болыптaбылaды. Осы мaқсaтқaжетуүшін, ең aлдыменКaно сaуaлнaмaсы түзіліп,116 студенткеқолдaнылдыжәнебілімберугежәнеоның сaпaсынa қaтыстыстуденттердіңтaлaптaры мен қaжеттіліктерітоптықжұмыстaрaрқылыaнықтaлды. Екіншіден,бұл aнықтaлғaн тaлaптaр мен қaжеттіліктерКaно бaғaлaу кестесіменжіктелді.Осылaйшa, сaпa тaлaптaры төрт сaнaтқa бөлінді:болуытиіс, бір өлшемді,тaртымдыжәнебейтaрaп.Соңындa,қaнaғaттaну мен қaнaғaттaнбaудың мәндеріесептелдіжәнестуденттердіңқaнaғaттaну мен қaнaғaттaнбaу деңгейлерінжоғaрылaту мен төмендетудеосытaлaптaр мен қaжеттіліктердіңрөліaйқын aнықтaлды.Түйінсөздер:сaпa, сaпaлық қaжеттіліктер,білімберусaпaсы, Кaно моделі.
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Abstract This chapter describes the plethora of noise, vibration, and harshness ( NVH ) concerns in vehicular drivetrain systems. With a trend toward compact lightweight lightly damped drivetrain systems, such phenomena are likely to exacerbate. Significant NVH concerns such as transmission rattle, driveline clonk, and clutch in‐cycle whoop are described and methods of measurement and modeling are described. These NVH phenomena are regarded as refinement quality issues by vehicle customers, thus a concern to the automobile industry. Various methods of palliation are also discussed.
Harshness
Drivetrain
Powertrain
Manual transmission
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