초록 ▼

A muffler responsive to exhaust flow rate is provided for an internal combustion engine. The muffler includes a body having a variable restrictor located downstream from an inlet port and upstream from an outlet port of the muffler. The variable restrictor includes a valving element with an operativ

A muffler responsive to exhaust flow rate is provided for an internal combustion engine. The muffler includes a body having a variable restrictor located downstream from an inlet port and upstream from an outlet port of the muffler. The variable restrictor includes a valving element with an operative position which varies as a function of engine exhaust flow rate to occlude exhaust gas flow. The variable restrictor is formed with a solid wall disposed about the valving element to define a constricting annular passageway having a cross section that varies with distance from the inlet port and from the outlet port. The passageway cross section for some mufflers will increase in a direction proceeding from the inlet port toward the outlet port, and will decrease proceeding in that same direction in other mufflers, depending upon the type of internal combustion engine employed.

대표청구항 ▼

An engine muffler responsive to exhaust flow rate for an internal combustion engine, comprising: a body forming an internal expansion chamber and having an inlet port and an exhaust port spaced apart from one another, to receive and to discharge exhaust gas stream, respectively, and a variable restr

An engine muffler responsive to exhaust flow rate for an internal combustion engine, comprising: a body forming an internal expansion chamber and having an inlet port and an exhaust port spaced apart from one another, to receive and to discharge exhaust gas stream, respectively, and a variable restrictor downstream from said inlet port and upstream from said outlet port, through which said exhaust gas stream must flow to reach said exhaust port, said variable restrictor including a valving element whose operative position can variably occlude said gas stream flow as a function of engine exhaust flow rate, and wherein said variable restrictor is formed with a solid wall disposed about said valving element to define a constricting annular passageway having a cross section that varies with distance from said inlet port and from said exhaust port.