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A FORK IN THE ROAD: WHERE DID THE COMPRESSION GO?
| 题名： | A FORK IN THE ROAD: WHERE DID THE COMPRESSION GO? |
| 正文语种： | eng |
| 作者： | BRANDON STECKLER |
| 摘要： | Using specialized tooling to locate engine mechanical faults is tricky at first, but when there is more than one issue, it can seem like an impossible technique to master, especially for a novice. This case came from great friends of mine at Black Hills Tire in Rapid City, South Dakota. They were faced with a 2014 Ram ProMaster van with a 3.6L V6 engine. The vehicle came to the shop with an overheating concern and a loss of antifreeze from the cooling system, but no visible leaks were present. Quick to grab their Pico lab scope, current probe, and delta sensor, they cranked the engine over several times while obtaining starter current (for relative compression), and pressure pulse data from the cooling system reservoir (Figure 1). This data indicates a few important pieces of information pertaining to the health of each of the cylinders, which cylinder is faulted, and most importantly, at what area of the cylinder the fault is occurring. |
| 出版年： | 2023 |
| 期刊名称： | Motor age |
| 卷： | 142 |
| 期： | 4 |
| 页码： | 43-45 |
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