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D6201-19 – Standard Test Method Technical Guide
📐 Scope and Significance
ASTM D6201-19a provides a standardized dynamometer test procedure for evaluating intake valve deposit (IVD) formation in unleaded spark-ignition engine fuels. Under the jurisdiction of Subcommittee D02.A0.01, it utilizes a Ford Ranger 2.3 L four-cylinder engine to assess the deposit control performance of fuels and additives.
| 🔧 Parameter | 📏 Specification |
|---|---|
| Test Engine | Ford Ranger 2.3 L I-4 |
| Unit System | SI Units (Standard) |
| Calibration Authority | ASTM Test Monitoring Center (TMC) |
| Designation | D6201 − 19a |
⚠️ TMC Information Letters: Users must obtain recent Information Letters from the TMC to ensure compliance with the latest hardware changes and procedural modifications.
⚙️ Engine Prep and Test Procedure
The method mandates strict preparation of the test stand, engine block, and cylinder head (Sections 6.2-6.3). The fuel supply system (Section 6.2.5) and engine control calibration (Section 6.2.6) are critical. The test cycle applies specific speed and load sequences designed to replicate deposit-forming conditions while periodic measurements verify operational conformance.
| ⚙️ Procedure Step | 📐 Key Requirement |
|---|---|
| Engine Build-Up | New parts per Section 6.3.2 |
| Calibration | Test Stand & Instrumentation (Section 11) |
| Test Fuel | Reference Fuel per Section 9 |