Performance Test (Jis Standard); Engine Equipment Condition; Test Items And Purposes; Operation Load Test - Mitsubishi Heavy Industries SL Series Service Manual

3. Performance test (JIS standard)

The following describes the procedures specified in "Earth
moving machinery - Engines - Part 1: Test code of net
power (JIS D0006-1)" and "Earth moving machinery -
Engines - Part 2: Standard format of specifications and
testing methods of diesel engines (JIS D0006-2)."
Other test items may be required in some applications. All
test results should be evaluated comprehensively in order to
determine the engine performance.

3.1 Engine equipment condition

The engine must be equipped with standard auxiliary
devices such as cooling fan, air cleaner and alternator.

3.2 Test items and purposes

3.2.1

Operation load test

Conduct this test to evaluate the engine output, torque, fuel
consumption rate and governor performance under various
load conditions.
3.2.2

Continuous load test

Operate the engine continuously for 10 hours at 90% load
(continuous load application) of nominal net brake power
while the engine speed is maintained at revolutions
corresponding to the nominal brake power. In this test,
evaluate the fuel consumption rate and operating condition,
and confirm that the engine is capable of continuous
operation.
3.2.3

Low idle test

Conduct this test to confirm that the engine can operate
stably at the specified low idle speed.
3.3 Other inspections
Check for gas, coolant and oil leaks; abnormal odors; and
hunting. Make adjustment as needed.

3.4 Engine output adjustment

Diesel engine output is affected by atmospheric pressure,
temperature and humidity.
calculations must be performed to obtain the value of engine
output under the standard atmospheric conditions.
3.4.1

Standard atmospheric conditions:

Base temperature: 298 K (25°C) [77°F]
Total pressure: 100 kPa (750 mmHg)
Dry pressure: 99 kPa (743 mmHg)
Therefore, correction
ADJUSTMENT AND OPERATION
13-9