Introduction to Internal Combustion Engines

Internal combustion engine supercharging: turbocharger vs. pressure wave compressor. Performance comparison

“…This results in more air and fuel entering each cylinder during each cycle. This added air and fuel creates more power during combustion, and the net power output of the engine is increased [3,5].…”

“…A gasoline unit has be chosen due to low torque at low revs. The aim of this paper is to demonstrate that the pressure wave supercharger is way better than turbocharger, at low rev operation [3,7].…”

“…This direct contact action inside the PWS results in energy transfer in such short time that the PWS can respond quickly according to the different engine working conditions, hence there is no so-called 'turbo lag' problem like turbo charger [3,5]. Furthermore, this unique direct contact may also cause internal exhaust gas recirculation (EGR) usefully for reducing the NO x emission [4,5,10].…”

“…Meanwhile, there are other attractive advantages, such as large torque at small engine speeds and less soot during acceleration. All these good characteristics make the PWS suitable for automobile engines whose loads vary a lot [3,11,12].…”

“…It is followed by the Stirling engine, gas turbine and gas machine (Figure 1). Although the electric engine has an efficiency of 85%, this does not compensate the losses of the electrical energy build-up [2,3].…”