Research Article
The Effect of Injection Timings on Performance and Emissions of Compressed Natural-Gas Direct Injection Engine
Table 1
Engine specifications.
| | Parameter | Value | Unit |
| | Number of cylinders | 4 | — | | Type | Inline | — | | Capacity | 1596 |
cm3 | | Bore | 76 | mm | | Stroke | 88 | mm | | Connecting rod length | 131 | mm | | Crank radius | 44 | mm | | Compression ratio | 14 | — | | Intake valve opening | 12 | bTDC | | Intake valve closing | 48 | aBDC | | Exhaust valve opening | 45 | bBDC | | Exhaust valve closing | 10 | aTDC | | Maximum intake valve lift | 8.1 | mm | | Maximum exhaust valve lift | 7.5 | mm |
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