A two-dimensional technique for the quantitative determination of the fuel-air ratio in hydrogen fuelled engines has been developed. The technique is based on the spontaneous Raman scattering of the hydrogen molecules (Stokes Q-branch) and the simultaneous measurement of the pressure inside the combustion chamber. From these data the local partial pressure of the hydrogen and, therefore, the fuel air ratio can be calculated. This method was applied in a single cylinder direct injection research engine in order to prove the applicability of this technique under real engine conditions. The measurements inside the side chamber of the engine show a fast mixing process of the compressed air and the injected hydrogen (6 MPa injection pressure) independent of the injection timing.
Quantitative time resolved 2-D fuel-air ratio measurements in a hydrogen direct injection SI engine using spontaneous Raman scattering
Quantitative zeitaufgelöste 2D Messungen des Treibstoff/Luft Verhältnises in einem Ottomotor mit Wasserstoffdirekteinspritzung mit Verwendung spontaner Raman-Streuung
1996
9 Seiten, 12 Bilder, 3 Tabellen, 39 Quellen
Conference paper
English
British Library Conference Proceedings | 2000
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SAE Technical Papers | 2000
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