专业汽车英语翻译 姜大班长求帮忙。刚才剩下的

专业汽车英语翻译 姜大班长求帮忙。刚才剩下的
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
These tests must be made at a temperature regulated to =2. The tractor is coupled to a dynamometer bench as in the power take-off tests.
During the tests the following temperatures are taken:water temperature at the cylinder block before the thermostat or, in the case of an air-cooled engine, temperature at the point prepared by the engine manufacturer to hold the temperature sensing device;air temperature at the coooling system inlet; engine oil temperature; air temperature at the air cleaner inlet; fuel temperature.

Test procedure
A first series of tests takes place with the governor control lever set for maximum power at the rated speed of the engine
The temperature of the cooling system and of the engine oil, at maximum engine power and under stable conditions, are recorded as a function of the ambient temperature which will be taken as being the temperature of the air entering the cooling system.
Before taking readings, all temperatures must be stabilised. The ambient temperature limit for running the tractor is the temperature at which the engine achieves its temperature limit in running, determined either by the boiling of the cooling water or by obtaining the maximum temperature at the insertion point of the safety thermostat specified by the manufacturer, or yet again by obtaining the maximum temperature fixed by the manufacturer gor the engine oil.
The approximate value of the ambient temperature limit is worked out graphically by extrapolating the engine temperature curves(cooling system or oil temperature).

Test results
The power loss is determined in the same way, being expressed as a percentage of maximum power obtained in the main power take-off tests. If the power take-off speed at maximum power is more than 25 per cent greater than at standard speed, the test shall be repeated at that speed.