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Piwoslaw
aero guerrilla

Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,547

Svietlana II - '13 Peugeot 308SW e-HDI 6sp
90 day: 58.1 mpg (US)
Thanks: 1,065
Thanked 642 Times in 402 Posts
1.9 TDI ALH 90hp:

From:

That blog has some really nice info, in fact it's probably the most comprehensive source of automotive info I've seen on the Polish Web recently. It gives a link to a German book with a few charts (Ottomotoren mit Direkteinspritzung: Verfahren, Systeme, Entwicklung, Potenzial, pp. 198-201), which are OK except that they don't have power curves.
Quote:
 However, those charts do not have the power curves. They can be drawn using other values, the mean useful pressure and speed. For engine power based on useful medium pressure, we use the formula *: N = V * p * n/120 N - Power V - engine displacement p - the average usable pressure (bmep) n - rotational speed For example, 12 bar at 2000 r / min for the 1.9 TDI. We must replace those units with SI: 1.9 l = 1.9 * 10 ^ (-3) m ^ 3 12 bar = 12 * 10 ^ 5 Pa 1.9 * 10 ^ (-3) [m ^ 3] * 12 * 10 ^ 5 [Pa] * 2000 [r / min] / 120 = 38 000 [W] = 38 [kW] / 0.7355 [hp / kW] = 51 [HP] * For two-cycle engine: N = V * p * n/60