The uploaded image contains a set of mathematical and engineering questions related to a diesel engine's efficiency, output power, and cylinder gas volume. Let me analyze each question and provide explanations:

k) Mikä on tyypillinen dieselmoottorin hyötysuhde?

The efficiency of a diesel engine typically varies, but the question mentions using "parhaimmillaan" 40%. In real-life conditions, the efficiency usually falls below 30% due to non-optimal operational conditions.

l) Hyötysuhteella laskettuna, mikä on hyötyteho renkailla? (16.2 kW)

To calculate the effective power delivered to the wheels based on efficiency:

1. Formula:
   $P_{\text{renkailla}} = P_{\text{moottori}} \cdot \text{hyötysuhde}$

2. Given:

   • Total output power $P_{\text{moottori}}$ = 16.2 kW
   • Efficiency ($\eta$) = assumed 30% (or 0.3 in decimal form)

3. Substitution:
   $P_{\text{renkailla}} = 16.2 \, \text{kW} \cdot 0.3 = 4.86 \, \text{kW}$

The power at the wheels is 4.86 kW.

m) Mikä on sylinterin kaasutilavuus, kun mäntä on alhaalla?

1. Formula:
   $V_{\text{sylinteri}} = \frac{V_{\text{iskutilavuus}}}{\text{Sylinterien lukumäärä}}$

2. Given:

   • Total displacement $V_{\text{iskutilavuus}}$ = 1364 cm³
   • Number of cylinders = 4

3. Substitution:
   $V_{\text{sylinteri}} = \frac{1364 \, \text{cm}^3}{4} = 341 \, \text{cm}^3$

The gas volume for one cylinder is 341 cm³.

Let me know if you'd like detailed explanations for any step! 😊

Related Questions:

1. How is the efficiency of a diesel engine compared to a gasoline engine, and why?
2. If the engine's efficiency dropped to 25%, what would the power delivered to the wheels become?
3. How does cylinder gas volume affect engine compression ratio and performance?
4. What factors cause the real efficiency of diesel engines to drop below their theoretical value?
5. How would the output power at the wheels change if the engine's efficiency increased to 40%?

Tip:

When calculating efficiency, always consider losses in the system (e.g., thermal, mechanical) to ensure realistic estimates.