Otto cycle is a constant ________ cycle.

Explanation

Explanation: The air-standard-Otto cycle is the idealized cycle for the spark-ignition internal combustion engines. The Otto cycle 1-2-3-4 consists of the following four processes: Process 1-2: Reversible adiabatic compression of air Process 2-3: Heat addition at constant volume Process 3-4: Reversible adiabatic expansion of air Process 4-1: Heat rejection at constant volume Important Points Otto Cycle Constant volume heat rejection. Constant volume heat addition. Carnot Cycle Constant temperature heat rejection. Constant temperature heat rejection. Diesel Cycle Constant pressure heat addition. Constant volume heat rejection. Dual Cycle Constant volume and constant pressure heat addition Constant volume heat rejection