මේ ගැන සාකච්ඡා කරමු
Is it more efficient to run at high rpm with little throttle or low rpm with more throttle?
Quick answer the latter (Petrol engines).
Running at high rpm with litttle throttle - pumping losses are high, compression is low, more firings per kilometre means less efficiency compared to 2.
Running at low rpm and wider throttle - compared with 1 above pumping losses lower as wider throttle is used, greater cylinder fill so higher compression and better use of fuel, less firings per kilometre means less fuel being used to overcome friction.
Is it more efficient to run at high rpm with little throttle or low rpm with more throttle?
Quick answer the latter (Petrol engines).
Running at high rpm with litttle throttle - pumping losses are high, compression is low, more firings per kilometre means less efficiency compared to 2.
Running at low rpm and wider throttle - compared with 1 above pumping losses lower as wider throttle is used, greater cylinder fill so higher compression and better use of fuel, less firings per kilometre means less fuel being used to overcome friction.
