A study was made on a two-stroke-cycle spark ignition engine which was fueled with methanol containing water with a mixture ratio of 0, 10 and 20% by volume. Experiments were carried out at various ignition timings and excess air ratio under a constant delivery ratio and a constant speed. Ignition timing of MBT with neat methanol is about 30 degrees BTDC. With increasing water content ratio, the ignition duration which is a period from igniton point to specific burning weight ratio of 10% is increased. Consequently, the MBT is shifted to advanced timing. Even with 20% water content, the engine can run with about the same power level and efficiency at each MBT.
含水メタノール燃料を用いた小形二サイクルエンジン性能に及ぼす点火時期の影響
tjsmeb-v61n585p1942-1947.pdf
(491.86KB)
