In air standard cycle analysis of IC engines, which of the following statements is correct?

In air standard cycle analysis of IC engines, which of the following statements is correct?

Right Answer is:

There are no intake or exhaust processes.

SOLUTION

There are three standard cycles that are used to perform analysis of IC engine:

  1. Constant volume combustion (Otto) cycle
  2. Constant pressure combustion (Diesel) cycle
  3. Combination of constant volume and constant pressure combustion (Dual) cycle

One procedure is to employ an air-standard analysis having the following elements:

  1. A fixed amount of air modeled as an ideal gas is the working fluid.
  2. The combustion process is replaced by a heat transfer from an external source.
  3. There are no intake and exhaust processes because they are replaced by heat addition and heat rejection processes. The cycle is completed by a constant-volume heat transfer process taking place while the piston is at the bottom dead center position.
  4. All processes are internally reversible.
  5. In addition, in a cold air-standard analysis, the specific heats are assumed constant at their ambient temperature values.
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