عنوان مقاله
مشتق گیری از شرایط با ویژگی قبل از قفل شدن بر اساس روش نظارت بر سیستم کلاچ در گیربکس اتوماتیک
فهرست مطالب
مقدمه
روش نظارت بر وضعیت کلاج بر اساس ویژگی های قبل از قفل شدگی
توسعه نظری
نتایج تجربی و بحث
نتیجه گیری
بخشی از مقاله
عملکرد و اساس کار
اصطکاک مرطوب یا کلاج مرطوب در قطعات مکانیکی است که انتقال قدرت در طول عملیات موتور به چرخ ها را داشته و بر اساس اصطکاک بر روی سطوح لغزنده می باشند. روغن کاری کلاج توسط یک سیال در انتقال اتوماتیک است که توسط یک تابعATF است که به عنوان یک روان کننده خنک کننده و تمییز کننده سطوح بوده و عملکرد نرم و صافی را بوجود می آورد. با این حال، حضورATF در کلاج ضریب اصطکاک را کاهش می دهد .
کلمات کلیدی:
On the derivation of the pre-lockup feature based condition monitoring method for automatic transmission clutches Agusmian Partogi Ompusunggu n Flanders0 Mechatronics Technology Centre (FMTC), Celestijnenlaan 300D, 3001 Heverlee, Belgium article info Article history: Received 5 May 2013 Received in revised form 24 November 2013 Accepted 27 December 2013 Available online 21 January 2014 Keywords: Wet friction clutches Automatic transmissions Condition monitoring Engagement duration Slip distance abstract This paper discusses how a qualitative understanding on the physics of failure can lead to a theoretical derivation of effective features that are useful for condition monitoring of wet friction clutches. The physical relationships between the features and the mean coefficient of friction (COF) which can be seen as the representation of the degradation level of a wet friction clutch are theoretically derived. In order to assess the accuracy of the theoretical relationships, Pearson0 s correlation coefficient is applied to experimental data obtained from accelerated life tests on some commercial paper-based wet friction clutches using a fully instrumented SAE#2 setup. The analyses on the experimental data reveal that the theoretical predictions are plausible. & 2014 Elsevier Ltd. All rights reserved. 1. Introduction Vehicles have become indispensable utilities in our modern society. Designs of vehicles have evolved from basic transportation utilities into advanced modern vehicles that can satisfy the increasing demands of the society for safety, driving comfort, high energy efficiency, low cost, high power capacity, etc. In a vehicle, a transmission system is one of the key devices that is responsible to accomplish the aforementioned requirements. A transmission system is defined as a device having the function to transfer power from the engine to the wheels, via the axles. The increasing sophistication of modern vehicles is also accompanied by the growing complexity of the transmission system. In recent years, original equipment manufacturers (OEMs) have launched different types of transmission on the automotive market which can be, in general, classified into two main groups, namely (i) manual systems and (ii) semi or fully automatic system. A manual system consists of traditional Manual Transmission (MT), while the automatic system can be of different types, such as traditional Automatic Transmission (AT), Automated Manual Transmission (AMT), Continuously Variable Transmission (CVT), and Power Shift Transmission/Dual Clutch Transmission (DCT). As is obvious from its name, an automatic system is a transmission that shifts power or speed by itself, while the manual system involves the driver to do so. Fig. 1 shows the annual sales ratios of manual and automatic systems with respect to the total annual sale of all transmissions from the years 2001 till 2015 [1,2]. The trends reveal that the drivers0 perspective has changed since the last decade. It is also obvious from the figure that the global economic recession occurring in 2008 and 2009 impacted the customers0 response on the selection of the transmission, which seemed to be only temporarily. Vehicles with manual
