Why do most temperature control valves in diesel engine closed freshwater cooling systems vary the flow of jacket water through the cooler instead of through the engine?
• Closed freshwater cooling systems in diesel engines and how jacket water circulates • Effects of changing flow rate through engine jackets on temperature distribution • Purpose of controlling flow through the cooler (heat exchanger) instead of through the engine
• Think about what could happen inside the cylinder block and heads if water flow speed in the jackets is frequently increased or decreased. • Which option describes a realistic engineering concern about metal temperatures and engine life, not just cooler performance? • If you keep engine jacket flow nearly constant, what is safer or more stable about the engine’s operating conditions?
• Which choice directly relates to temperature distribution in the engine block and heads? • Which options talk about problems in the cooler rather than in the engine itself—are those as critical? • Ask: If I were the designer, would I want frequent flow changes inside the engine jackets, or would I prefer most of the adjustment to happen in the cooler circuit? Why?
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