FIELD: transport engineering.
SUBSTANCE: invention relates to vehicles powered by internal combustion engines. According to proposed method, noise and vibrations generated by engine are suppressed by forming compensating signal with resolving noise and vibrations into series of harmonic components of different frequency, and at damping provision is made for reduction of outer and inner noise generated by vehicle engine, taking into account coherent radiation of low frequency noise by free cuts of air intake branch pipe of air cleaner and tail pipe of exhaust system muffler. Compensating signal with amplitude equivalent to amplitude of suppressed noise and with counterphase is radiated into damping zones close to free cuts of air intake branch pipe and tail pipe, and noise and vibration pickups are installed in zones of minimum influence of external factor and at distance not exceeding 1/10λ from determined undesirable sources of aerodynamic or structural noise where λ is noise wavelength. Noise and vibration damping is carried out additionally in engine compartment and passenger compartment using noise and vibration absorbing and noise and vibration isolating materials for this purpose. Invention contains description of device aimed at reducing noise of vehicle powered by internal combustion engine.
EFFECT: improved noise damping.
6 cl, 4 dwg
