DIESEL ENGINE
EXHAUST SMOKE EMISSIONS
FUEL TECHNOLOGY RECOMMENDED TEST PROCEDURE
|
Introduction
The purpose of this bulletin is to detail a recommended
procedure for smoke emissions testing on mobile equipment, using the Bosch Smoke Meter
(with ETD 020.00 sampling pump and ETD 020.50 evaluating instrument).
|
Procedure
| 1. |
The engine should be in reasonable mechanical condition, with no
mechanical defects that may interfere with test results. New or rebuilt engines should be
run in for not less than 240 kilometres. |
| 2. |
Any orifice which would permit air to be drawn into the exhaust system
should be blocked. |
| 3. |
The engine should be run up to within normal operating temperatures prior
to, and maintained during the test. |
| 4. |
Ensure cold starting devices are not, and cannot be, brought into
operation during normal engine operation. |
| 5. |
For the test to be valid in accordance with ADR 30/00
clause 30:3.1.6, the factor F shall be between the range  . Calculate by: |
| Where: T = |
the absolute temperature of the inlet air, measured within
150 mm ± 10 mm of the point of entry to the engine
system, expressed in degrees Kelvin. |
| H = |
the atmospheric pressure expressed in KPa.
|
Treated Test
| 1. |
Prior to the treated test the engine should be operated on the FTC
catalyst treated fuel for a conditioning period of approximately 200-300 hours. From
previous experience it has been observed that during the early stages of using FTC
catalyst treated fuel, the soot emissions tend to increase prior to reducing. A possible
explanation for this trend is that an attrition process takes place on exiting soot
particulates which accumulate in the engine while being operated on untreated fuel. |
| 2. |
The treated test should be carried out in the same manner
as per the base tests.
|
Evaluation
Evaluation of the darkened filter paper disks with the
diesel smoke evaluator, should be carried out according to the manufacturer’s
operating instructions.
|
General Comments
| 1. |
The aforementioned procedure has been compiled to maintain
general conformity (where practical) with the Australian Design Rule ADR30/00 diesel
engine exhaust smoke emissions (currently under review), and the Bosch smoke meter
operating instructions. |
| 2. |
Consideration should also be given to any vehicle
manufacturers operational requirements or limitations. |
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