GB/T 9487-2008Diesel engines - Exhaust gas measurement under free acceleration (English PDF)

2.1

In the case of the diesel engine with the flywheel and other rotating inertia, low idle (no load minimum speed), the sudden rapid high idle speed (no load most High speed) acceleration operation conditions.

2.2

Diesel engine exhaust smoke free acceleration maximum operating conditions when measured.

3.1 Test conditions

3.1.1 Diesel exhaust smoke free acceleration should be measured at the engine test bench.

3.1.2 The engine shall be disengaged with the dynamometer, and shall be equipped with a power unit and supporting inertia substantially equivalent rotating member. Allows the use of the clutch Allows the engine and dynamometer disengaged, the inertia of the portion of the clutch as long as the engine is running along together does not exceed the total inertia of the engine 25%. It agreed by the parties, allowing the test in the case of the engine and dynamometer phase junctions.

3.1.3 Engine test carried attachments must comply with the relevant standards or engine manufacturer's technical documentation.

3.1.4 before the test, the diesel engine allows the technical documentation specified by the manufacturer were run-in.

3.1.5 test diesel fuel injection pump limiter should be fixed at rated power required oil position, and should ensure that the engine can reach The specified maximum load speed. Different environmental conditions and standard atmospheric conditions during the test if, in accordance with relevant permit amendment provisions of the standard calibration work Rates and adjust the fuel injection pump limiter position.

3.1.6 test, the diesel engine should be specified in the instructions diesel and oil grades. Quality diesel fuel and oil should be consistent with national standards regulations set. Smoke containing diesel fuel additives are not allowed.

3.1.7 test diesel engine exhaust pipe to minimize the elbow and shaped pipe, the exhaust pipe surface should be finishing. Should ensure that the entire exhaust pipe Paul exhaust is not diluted. Exhaust system backpressure shall not exceed the engine manufacturer's technical documentation specified limits.

3.1.8 should be carried out sampling and exhaust smoke measurements on diesel engine exhaust manifold or the extension tube, the installation location should meet the sampling probe attached Record A. 3.2 requirements. May not set any sensor might interfere with installation of the exhaust flow in the exhaust pipe of the sampling probe.

Diesel exhaust smoke test if there are two separate exhaust outlet pipe, it should be merged into a two outlet pipe exhaust manifold after Measurement. But also it allows the two separate exhaust pipe exhaust smoke measurements were, then, should take the larger value as a measure of smoke The amount of results.

3.2 Measuring Instruments

Smoke Opacimeter should be specified in Appendix A of the free acceleration measuring diesel exhaust smoke.