1 – a sharp change in the position of the accelerator pedal by the driver
2 – engine crankshaft speed curve without active shock absorber
3 – crankshaft speed curve of the engine with active shock absorber
When the accelerator pedal is pressed or released sharply, the amount of fuel injected should change rapidly, which should lead to an equally rapid change in the engine crankshaft speed. These sudden changes in load lead to the generation of oscillations, which are based on oscillations from the engine crankshaft speed.
The active damper reduces these periodic fluctuations in engine speed by varying the amount of fuel injected at a rate that corresponds to engine speed: when the accelerator pedal is pressed sharply, less fuel is injected, and when the pedal is released sharply, more fuel is injected. This effectively reduces momentary surges in engine speed.