Mixed/dual cycle

[1] Heat is added partly at constant volume (isochoric) and partly at constant pressure (isobaric),[2] the significance of which is that more time is available for the fuel to completely combust.

Because of lagging characteristics of fuel this cycle is invariably used for Diesel and hot spot ignition engines.

It consists of two adiabatic and two constant volume and one constant pressure processes.

The dual cycle consists of following operations:

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