1. An exhaust gas purification system for an internal combustion engine comprising:
a particulate filter arranged in an exhaust passage of an internal combustion engine,
a selective catalytic reduction catalyst that is arranged in a portion of the exhaust passage at the downstream side of said particulate filter;
a reducing agent supply device that supplies a reducing agent, which is ammonia or a precursor of ammonia, to a portion of the exhaust passage at the upstream side of said selective catalytic reduction catalyst; and
an EGR device that supplies a part of exhaust gas flowing through the exhaust passage to an intake passage as an EGR gas;
a first temperature detection unit that detects a temperature which is correlated with the temperature of said particulate filter;
a second temperature detection unit that detects a temperature which is correlated with the temperature of said selective catalytic reduction catalyst;
a detection unit that detects an amount of trapped PM which is an amount of PM trapped in said particulate filter; and
a control unit that controls the EGR device so as to increase the amount of EGR gas, when a detected value of said first temperature detection unit is equal to or higher than the lowest temperature at which particulate matter can be oxidized, and when the amount of trapped PM detected by said detection unit is smaller by a predetermined amount or more, with respect to the amount of trapped PM which becomes an execution condition of PM regeneration processing, and carries out NOx increasing processing which is processing to increase NOx discharged from the internal combustion engine, when the detected value of said first temperature detection unit belongs to a temperature range which is lower than the lowest temperature at which particulate matter can be oxidized, and in which an oxidation reduction reaction between the particulate matter trapped in the particulate filter and nitrogen dioxide which is a part of NOx contained in the exhaust gas is promoted, and when a detected value of the second temperature detection unit belongs to an NOx reduction window.
2. The exhaust gas purification system for an internal combustion engine in claim 1, wherein when the detected value of said first temperature detection unit is equal to or higher than the lowest temperature at which particulate matter can be oxidized, and when the amount of trapped PM detected by said detection unit is smaller by the predetermined amount or more with respect to the amount of trapped PM which becomes an execution condition of PM regeneration processing, said control unit controls said EGR device so as to increase the amount of EGR gas, on condition that the detected value of said second temperature detection unit is equal to or more than an upper limit value of said NOx reduction window.
3. The exhaust gas purification system for an internal combustion engine in claim 2, wherein said control unit decreases the amount of the reducing agent supplied from said reducing agent supply device in a period of time in which said EGR device is controlled so as to increase the amount of EGR gas.
4. The exhaust gas purification system for an internal combustion engine in claim 1, wherein said NOx increasing processing is processing to control said EGR device so as to decrease the amount of EGR gas.
5. The exhaust gas purification system for an internal combustion engine in claim 1, wherein
said internal combustion engine is an internal combustion engine of compression ignition type which is equipped with a fuel injection valve for injecting fuel into a cylinder; and
said NOx increasing processing is processing to advance fuel injection timing of said fuel injection valve.
6. The exhaust gas purification system for an internal combustion engine in claim 2, wherein said NOx increasing processing is processing to control said EGR device so as to decrease the amount of EGR gas.
7. The exhaust gas purification system for an internal combustion engine in claim 3, wherein said NOx increasing processing is processing to control said EGR device so as to decrease the amount of EGR gas.
8. The exhaust gas purification system for an internal combustion engine in claim 2, wherein
said internal combustion engine is an internal combustion engine of compression ignition type which is equipped with a fuel injection valve for injecting fuel into a cylinder; and
said NOx increasing processing is processing to advance fuel injection timing of said fuel injection valve.
9. The exhaust gas purification system for an internal combustion engine in claim 3, wherein
said internal combustion engine is an internal combustion engine of compression ignition type which is equipped with a fuel injection valve for injecting fuel into a cylinder; and
said NOx increasing processing is processing to advance fuel injection timing of said fuel injection valve.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A wire harness for communicably connecting a plurality of electronic devices which are mounted in a vehicle and an electronic control unit which controls the electronic devices, the wire harness comprising:
a standard connection circuit part which connects the electronic control unit and a standard electronic device which is mounted in the vehicle among the plurality of electronic devices; and
non-standard connection circuit part which connects the electronic control unit and non-standard electronic devices which are mounted in the vehicle among the plurality of electronic devices, wherein
the non-standard connection circuit part includes a communication connector which is provided to be connectable to one or more of the non-standard electronic devices, and a connection circuit which connects the communication connector to the electronic control unit, and
the communication connector is configured to perform multiplex communication which multiplexes communication of the one or more of the non-standard electronic devices which are connected to the communication connector and the electronic control unit, with the electronic control unit via the connection circuit, and
the multiplexed communications are received by the electronic control unit via one transmission line.
2. An electronic device control system which includes a plurality of electronic devices mounted in a vehicle, an electronic control unit which controls the plurality of electronic devices, and a wire harness which communicably connects the plurality of electronic devices and the electronic control unit, wherein
the wire harness comprises the wire harness as defined in claim 1,
the electronic control unit includes a standard electronic device control unit which controls the standard electronic devices, and a non-standard electronic device control unit which controls the non-standard electronic devices,
the standard electronic device control unit is connected with the standard electronic devices through the standard connection circuit part, and
the non-standard electronic device control unit is connected with the non-standard electronic devices through the non-standard connection circuit part.
3. The wire harness according to claim 1, wherein the standard electronic device is directly connected to the electronic control unit via the standard connection circuit part, and
the non-standard electronic devices are indirectly connected to the electronic control unit via the communication connector provided in the non-standard connection circuit part.
4. A wire harness for communicably connecting a plurality of electronic devices which are mounted in a vehicle and an electronic control unit which controls the electronic devices, the wire harness comprising:
a first connection circuit part which includes a first wiring path directly connecting the electronic control unit and at least one first electronic device which is mounted in the vehicle among the plurality of electronic devices; and
a second connection circuit part which includes a second wiring path indirectly connecting the electronic control unit and second electronic devices which are mounted in the vehicle among the plurality of electronic devices, wherein
the second connection circuit part includes a communication connector which is provided in the second wiring path to be connectable to one or more of the second electronic devices, wherein the second wiring path includes a connection circuit which connects the communication connector to the electronic control unit and a connection line which connects the communication connector to each of the second electronic devices, and
the communication connector is configured to perform multiplex communication which multiplexes communication of the second electronic devices with the electronic control unit via the connection circuit, and
the multiplexed communications are received by the electronic control unit via one transmission line.