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Service Manual Mitsubishi SQ-Series diesel engines
Version 08/2004
ENGLISH
PERFORMANCE TEST TESTING AND ADJUSTING
TESTING AND ADJUSTING
33 PERFORMANCE TEST
There are various performance test procedures, and
here the procedures for “Earth moving machinery
Engines, Part 1: Test code of net power (JIS D 0006-1)”
and “Earth moving machinery Engines, Part 2:
standard format of specifications and tests methods of
diesel engines (JIS D 0006-2)” are described. Other
test items may be required on application. Engine
performance is judged with integrated test results.
33.1 Engine Equipment Condition
Engine must be equipped with such standard
auxiliaries as cooling fan, air cleaner and alternator.
33.2 Tests and Their Purposes
1. Operation load test
Conduct this test to evaluate engine output,
torque, fuel consumption and governor perfor-
mance under various load conditions.
2. Continuous load test
Operate the engine continuously for 10 hours at
90% load (continuous load application) of nominal
net shaft output while engine speed is maintained
at revolutions corresponding to the nominal shaft
output. In this test, evaluate fuel consumption and
operating condition and confirm continuous engine
operation.
3. No-load minimum revolution test
Conduct this test to confirm that the engine can
operate stably at the specified no-load minimum
revolutions.
33.3 Other Inspections
During performance testing, inspect for leakage of
gases, coolant, lubricating oil, or fuel, and for noise or
hunting. Make adjustment, as needed.
33.4 Adjustment Engine Output
Diesel engine output is affected by atmospheric
pressure, temperature, and humidity. Therefore, the
engine output should be set for standard atmospheric
conditions.
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