The provided calculation methodology enables the evaluation of how disconnected cylinders affect engine power, overall efficiency, and fuel consumption. The study establishes that disconnecting cylinders leads to a proportional decrease in engine power. This means that an engine generating 154,5 kW power reduces to 113,4 kW with two disabled cylinders and goes down to 70,3 kW when four cylinders are disconnected. Reducing fuel consumption is especially notable at idle, showing a 27% drop after disabling half of the cylinders. However, fuel efficiency declines as the engine load increases until it reaches zero at the engine load factor. Discrepancies between the experimental and calculated data on fuel consumption and power are minimal, at around 7-8% during maximum load. Diesel engines have the potential to improve efficiency by shutting down certain cylinders, but the actual fuel savings depend on several factors, including the number of active cylinders, engine configuration, load, and mechanical losses incurred by the shutdown cylinders. A method for analyzing additional energy losses in the engine caused by forced and natural vibrations of motor-transmission systems in wheeled vehicles has been improved. The analysis utilizes the Meander function in the context of harmonic moment and Fourier series. This text describes a method for determining the power of mechanical losses and energy for pumping strokes, while considering changes in the temperature regime in disconnected engine cylinders at increased torque irregularity. It also determines the permissible number of disconnected cylinders, taking into account their effect on power and reliability of wheeled machines. This paper presents a method for evaluating the dependability of fundamental engine components in the context of increased torque irregularity resulting from the disconnection of some cylinders.

effective engine power, power change, engine, wheeled vehicle, cylinder shutdown, fuel consumption

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