| 摘要 |
<p>The invention concerns a method for determining combustion noise level (D3Ppil1, D3Ppal1) generated by an injection engine based on pressure measurements. Said method consists in: equipping the engine with a pressure sensor delivering a signal representing the pressure in at least one combustion chamber; applying a derivation process to the signal derived from the pressure sensor to form a signal (GP1) representing a pressure gradient in said combustion chamber; determining said noise level by evaluating the difference (D3Ppil1, D3Ppal1) between the value of the gradient at the local maximum (Mpil1, Mpal1) following an injection, and the gradient value during said injection (Ipil1, Ipal1). The invention is applicable to injection diesel engines.</p> |
