초록 ▼

An air supply and exhaust control system for an internal combustion engine comprises at least first and second turbosuperchargers, an operation prohibiting portion for prohibiting the second turbosupercharger from working as occasion demands, an exhaust gas flow detecting portion, an air supply cont

An air supply and exhaust control system for an internal combustion engine comprises at least first and second turbosuperchargers, an operation prohibiting portion for prohibiting the second turbosupercharger from working as occasion demands, an exhaust gas flow detecting portion, an air supply control portion for causing the operation prohibiting portion to prohibit the second turbosupercharger from working when a detection output from the exhaust gas flow detecting portion indicates that the exhaust gas flow is less than a first predetermined value, an exhaust gas discharging device connected to an exhaust passage in possession of variable exhaust resistance for discharging the exhaust gas, an exhaust resistance changing portion for changing the variable exhaust resistance, and an exhaust control portion for controlling the exhaust resistance changing portion to set the variable exhaust resistance to be relatively small when the detection output from the exhaust gas flow detecting portion indicates that the exhaust gas flow is more than a second predetermined value which is smaller than the first predetermined value and to be relatively large when the detection output from the exhaust gas flow detecting portion indicates that the exhaust gas flow is equal to or less than the second predetermined value.

대표청구항 ▼

An air supply and exhaust control system for an internal combustion engine comprising: a plurality of superchargers including at least first and second turbosuperchargers having respective turbines disposed in portions of an exhaust passage connected with the engine in parallel with each other and r

An air supply and exhaust control system for an internal combustion engine comprising: a plurality of superchargers including at least first and second turbosuperchargers having respective turbines disposed in portions of an exhaust passage connected with the engine in parallel with each other and respective blowers disposed in an intake passage connected with the engine, operation prohibiting means including an exhaust cutoff valve provided in the portion of the exhaust passage wherein the turbine of said second turbosupercharger is disposed for closing the portion of the exhaust passage so as to prohibit the second turbosupercharger from working as occasion demands, exhaust gas flow determining means for generating an output signal corresponding to an exhaust gas flow amount in the exhaust passage, air supply control means for controlling said operation prohibiting means to prohibit said second turbosupercharger from working when the detection output obtained from said exhaust gas flow detecting means indicates that the exhaust gas flow is less than a first predetermined value, exhaust gas discharging means connected to a portion of the exhaust passage downstream of the turbine of said first turbosupercharger having a variable exhaust resistance for discharging the exhaust gas from the exhaust passage, exhaust resistance changing means for changing the variable exhaust resistance of said exhaust gas discharging means, and exhaust control means for controlling said exhaust resistance changing means to set the variable exhaust resistance of said exhaust gas discharging means to be relatively large when the detection output obtained from said exhaust gas flow detecting means indicates that the exhaust gas flow is less than a second predetermined value which is smaller than said first predetermined value and to be relatively small when the detection output obtained from said exhaust gas flow detecting means indicates that the exhaust gas flow is equal to or more than the second predetermined value.