英语翻译The power take-off test will be made consisting of a two hour test at the maximum power specified by the manufacture with a 20 per cent increase in torque applied every five minutes for a period not exceeding one minute.If the engine does

英语翻译The power take-off test will be made consisting of a two hour test at the maximum power specified by the manufacture with a 20 per cent increase in torque applied every five minutes for a period not exceeding one minute.If the engine does
英语翻译
The power take-off test will be made consisting of a two hour test at the maximum power specified by the manufacture with a 20 per cent increase in torque applied every five minutes for a period not exceeding one minute.If the engine does not develop the 20 per cent increase in torque the intermittent overload shall be carried out at maximum engine torque.This fact shall be noted in the test report.In either case the maximum power take-off power reported for the two-hour test will be that specified by the manufacturer.
Non-mechanical coupling between engine and power take-off
This will be the case of a fluid or electrical power transmission system with its possible cooling component.The following test conditions and procedures shall apply.
In addition to those required under 4.1.4.1 above,a means shall be provided for measuring the temperature of any non-mechanical components which couple the engine to the power take-off system.
Test procedure
The governor control level being set for maximum power,the system shall be operated at maximum power take-off power for a period sufficient to establish stabilised conditions but not less than two hours.The power take-off system shall be considered stable when two consecutive temperature readings of the cooling device taken 10 minutes apart do not differ by more than 1度
The tractor shall then operate for a period of one hour.The maximum power quoted in the report shall be the average of minimum number of six readings to be evenly spread.If the power take-off or the engine speed deviates by more than 2 percent from the standard power take-off speed or calculated average speed respectively,the test shall be repeated.If the variation continues,the deviation shall be stated in the report.The temperature observed at the critical components of the system shall also be recorded.
A second one-hour test shall be made at the power take-off power level observed above and at the lowest engine speed which will maintain this power at the rated power take-off speed.
A third series of tests shall determine power take-off power at part loads with the governor control set as for the second test.Each test shall last at least 20 minutes and shall be made according to 4.1.1 above.
Performance at the belt or the belt pulley shaft
Test requirements
The tractor pulley shall be connected to that of the dynamometer bench by a belt.This belt shall be flexible and have appropriate power and torque transmission characteristics.Belt slip shall not exceed 2 percent and the necessary tension to obtain this condition shall be as small as possible.
The tests at the pulley shaft shall be conducted by directly coupling the tractor pulley to the dynamometer shaft.
All of the provisions for tests at the main power take-off sha apply to the belt tests and to the pulley shaft tests,with the exception of those at standard power take-off speed and for tractors unable to transmit the full engine power at the power take-off.
If the engine speed recommended by the manufacturer for tests at maximum power does not correspond to a standard belt speed,the operational characteristics of the engine at the speed corresponding to the standard belt speed shall be measured during the full load test.
Test results
The power,belt slip,hourly fuel consumption and specific fuel consumption in relation to engine speed shall be recorded,as in the main power take-off test.
Performance in a hot atmosphere
Test requirements

英语翻译The power take-off test will be made consisting of a two hour test at the maximum power specified by the manufacture with a 20 per cent increase in torque applied every five minutes for a period not exceeding one minute.If the engine does
希望给与最佳答案 谢谢和合作
起飞测试将包括在最大功率的制造与应用每五分钟为一个周期不超过一分钟的扭矩增加20％,在两个小时的测试.如果发动机不发展增加20％的扭矩间歇过载,应进行发动机的最大扭矩.在测试报告中应注意这一事实.在这两种情况下的最大功率,起飞功率两个小时的测试报告将是制造商指定的.

非机械起飞的引擎和动力之间的耦合
这将是其可能的冷却组件的流体或电力传输系统的情况下.下面的测试条件和程序应适用.

除了4.1.4.1上述规定的那些,应提供一种手段,用于测量温度的任何非机械部件的发动机的功率起飞系统耦合.

测试程序
级别设置为最大功率的调速器控制,系统应工作在最大功率起飞功率足够长的时间,建立稳定的条件,但不少于两小时.起飞的电源系统应被视为稳定时连续两次10分钟的冷却装置的温度读数相差不超过1度

然后操作拖拉机应为一小时的期间.在报告中引用的最大功率应的平均最低数量的六个读数均匀地涂抹.如果电源起飞或发动机转速偏差超过2％的标准电源起飞速度或计算平均速度分别,应重复测试.如果变化,偏差应在报告中表示.温度观测系统的重要组成部分,也应记录下来.

第二个1小时的测试应在电源起飞功率水平和最低的发动机速度,这将保持这种权力,在额定功率起飞速度.

第三个系列的测试将确定在部分负载的功率起飞功率的调速器设置为第二个测试.每次试验应持续至少20分钟,并应按照4.1.1以上.

在皮带或皮带轮轴的性能

试验要求.
拖拉机皮带轮应通过皮带连接到测功机板凳.这一带应是灵活的,并有适当的功率和扭矩传输特性.皮带打滑,不得超过2％,必要的张力,得到此条件下,应尽可能的小.