| 摘要 |
PURPOSE:To enable the driving of the engine, by closing the part of between a water jacket as a cooling water circulation circuit thereof and a heat riser with a bolt to maintain the engine at the stage immediately after the start thereof as a low temperature. CONSTITUTION:A heat riser 13 as hot water heating path is connected to a water jacket 8 which forms a cooling water circulation circuit in a colling water circulation system W. The heat riser 13 is formed in a lower side wall of an intake manifold 3. When testing the engine performance at a low temperature thereof, the water jacket 8 as the part between a cooling water circulation circyuit of the engine and the heat riser 13 are closed with a bolt 18. Moreover, one end of a pipe 16 is removed from an outflow port 15 while being closed. Then, a desired measuring device is mounted to the engine at a stable low temperature state under a desired atmospheric temperature and thereafter, the engine is started at a desired time. |
