Question 44Motor Plants - Assistant Engineer70% to pass
The pressure-volume diagrams illustrated are of four internal combustion engine cycles. Which one represents the theoretical diesel cycle? Illustration MO-0102
AI Explanation
The correct answer is B.
The pressure-volume diagram in option B represents the theoretical diesel cycle, which is characterized by constant-pressure combustion. This is in contrast to the constant-volume combustion of the Otto cycle (gasoline engines), which is represented by the diagrams in options A, C, and D.
The diesel cycle is the ideal thermodynamic cycle for compression-ignition, internal combustion engines, which is the operating principle of diesel engines. The constant-pressure combustion during the power stroke is a key feature that distinguishes the diesel cycle from other engine cycles.
Related Questions
#42 The average pressure exerted on a piston during each power stroke is termed_______________.#43 Most practical diesel engines today operate on a cycle which is a combination of the Diesel and Otto cycles. In this process, compression ignition _______________.#45 If point #1 in the diagram shown is the beginning of gas compression, which of the cycles listed is being illustrated? Illustration MO-0036 #46 The minimum fuel oil delivery pressure required for efficient injection depends primarily on the_______________.#47 Fuel injection systems are designed to primarily meter fuel, atomize fuel, and_______________.