首页> 外军国防科技报告 >Investigation of the Effects of Air-Conditioning System on the Temperature and Speed of Automobile Engine Using Paired T-Test and Regression Analysis
【2h】

Investigation of the Effects of Air-Conditioning System on the Temperature and Speed of Automobile Engine Using Paired T-Test and Regression Analysis

机译:用配对T检验和回归分析研究空调系统对汽车发动机温度和速度的影响

代理获取
代理获取并翻译 | 示例

摘要

This study investigated the effect of air-conditioning system on the tem-perature and speed of automobile engine before and after the air-conditioning system was put to use, while the vehicle was at static position. A 16-valve Nissan engine was used for this study, the engine was first run for 20 minutes before the data are collected. In the first case, the temperatures (℃) of the engine were taken in the interval o,f 10 minutes before and after the air-conditioning system is run and in the second case, the speeds of the engine were taken under the same conditions. The research hypothesis was formulated for 20 observations to argue that neither temperature nor speed of the engine changes when the air-conditioning system is put on and Paired t-Test statistics were used. The obtained result of t-statistics analysis for temperature and speed were -4.0329 and -5.51832 respectively. These results when compared to their critical values at 5 percent significant level, t-Statcritical < -1.73 for temperature and speed, were discovered to be at the rejection region which indicates that the null hypothesis (Ht0 and Hs0) in each case is rejected and accept that the air-conditioning system changes the temperature of the engine. Also, changes in speed requirements of the engine are not immediate and it could be as a result of an increase in fuel consump-tion due to more load on the engine. The regression correlation coefficients of 0.999996066 and 0.999653453 were obtained for the temperatures and speeds respectively with their R2 values, 0.999992132 and 0.999307027. The coefficients in the analysis were used to formulate the regression equations; T2 = 135.640 1.025t 0.496T1 and N2 = 634.005 3.824t 0.270N1 which can be used to forecast the temperatures and speeds of the engine during air-conditioning usage giving the initial parameters.
机译:本研究探讨了在汽车处于静止位置时,在使用空调系统前后,空调系统对汽车发动机的温度和速度的影响。本研究使用16气门日产发动机,该发动机首先运行20分钟,然后再收集数据。在第一种情况下,发动机温度是在空调系统运行前后10分钟的间隔内进行测量的;在第二种情况下,发动机温度是在相同条件下进行的。研究假设是针对20个观察结果而制定的,它们认为在安装空调系统并使用配对t检验统计数据时,发动机的温度或速度均不会改变。温度和速度t统计分析的结果分别为-4.0329和-5.51832。与在5%显着水平的临界值(温度和速度的t-Statcritical <-1.73)相比,这些结果被发现在拒绝区域,这表明在每种情况下均拒绝了原假设(Ht0和Hs0),并且接受空调系统会改变发动机的温度。同样,发动机转速要求的变化不是立即发生的,这可能是由于发动机上的更多负荷导致燃油消耗增加的结果。获得的温度和速度的回归相关系数分别为0.999996066和0.999653453,其R2值分别为0.999992132和0.999307027。分析中的系数用于制定回归方程; T2 = 135.640 1.025t 0.496T1,N2 = 634.005 3.824t 0.270N1,可用于预测空调使用期间发动机的温度和速度,并提供初始参数。

著录项

代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号