公开(公告)号：US5904902A

公开(公告)日：1999-05-18

申请号：US744235

申请日：1996-11-05

申请人： Hiroki Matuoka ,  Masaaki Tanaka ,  Shigemitu Iisaka ,  Michio Furuhashi ,  Toshinari Nagai ,  Tadayuki Nagai ,  Takashi Kawai ,  Kenji Harima ,  Yuuichi Gotou

发明人： Hiroki Matuoka ,  Masaaki Tanaka ,  Shigemitu Iisaka ,  Michio Furuhashi ,  Toshinari Nagai ,  Tadayuki Nagai ,  Takashi Kawai ,  Kenji Harima ,  Yuuichi Gotou

IPC分类号： F02P5/15 ,  F01N3/20 ,  F01N3/24 ,  F01N9/00 ,  F01N13/02 ,  F02D41/04 ,  F01N3/10

CPC分类号： F01N3/20 ,  F01N13/0097 ,  F01N3/2013 ,  F01N3/2026 ,  F01N9/00 ,  Y02T10/26 ,  Y02T10/47

摘要： An exhaust purifier for an internal combustion engine is capable of properly heating a catalyst in consideration of a deterioration with time and manufacturing variation in an electric heater that heats the catalyst.The exhaust purifier has the catalyst 4 disposed in an exhaust pipe, the electric heater for forcibly heating the catalyst 4, a power source for supplying power to the heater, an estimate unit for estimating the temperature that the catalyst 4 will reach, a comparator for providing the difference between the estimated temperature and a target temperature, and an operation controller for controlling the operating conditions of the engine according to the temperature difference. The estimate unit measures the voltage and current of the heater, calculates the resistance or power of the heater according to the voltage and current, and estimates the temperature. The operation controller adjusts the quantity of intake air and ignition timing, or adjusts ignition timing and then the quantity of intake air to maintain an engine speed, or, if a battery 6 is abnormal, adjusts the quantity of intake air and ignition timing to increase the temperature of exhaust gas.

摘要翻译： 考虑到加热催化剂的电加热器的时间劣化和制造变化，用于内燃机的排气净化器能够适当地加热催化剂。 排气净化器具有设置在排气管中的催化剂4，用于强制加热催化剂4的电加热器，用于向加热器供电的电源，用于估计催化剂4将达到的温度的估计单元， 提供估计温度和目标温度之间的差异;以及操作控制器，用于根据温度差来控制发动机的运行状况。 估计单元测量加热器的电压和电流，根据电压和电流计算加热器的电阻或功率，并估算温度。 操作控制器调节进气量和点火正时，或者调整点火正时，然后调节进气量以保持发动机转速，或者如果电池6异常，则调节进气量和点火正时增加 废气温度。

公开(公告)号：US5814283A

公开(公告)日：1998-09-29

申请号：US744229

申请日：1996-11-05

申请人： Hiroki Matuoka ,  Masaaki Tanaka ,  Shigemitu Iisaka ,  Michio Furuhashi ,  Toshinari Nagai ,  Tadayuki Nagai ,  Takashi Kawai ,  Kenji Harima ,  Yuuichi Gotou

发明人： Hiroki Matuoka ,  Masaaki Tanaka ,  Shigemitu Iisaka ,  Michio Furuhashi ,  Toshinari Nagai ,  Tadayuki Nagai ,  Takashi Kawai ,  Kenji Harima ,  Yuuichi Gotou

IPC分类号： F01N3/20 ,  F01N3/22 ,  F01N3/30 ,  F01N9/00 ,  F01N13/02 ,  B01D53/34 ,  G05D7/00

CPC分类号： F01N3/222 ,  F01N13/009 ,  F01N3/2013 ,  F01N3/2053 ,  F01N3/22 ,  F01N9/00 ,  Y02T10/26 ,  Y02T10/47

摘要： An exhaust purifier of an internal combustion engine supplies secondary air into an exhaust pipe without cooling nor inactivating an electrically heated catalyst (EHC) that is active. The exhaust purifier includes the EHC 3 disposed in the exhaust pipe 2, a main catalyst 4 disposed in the exhaust pipe 2 downstream from the EHC 3, and a unit for supplying secondary air into the exhaust pipe 2. The secondary air supply unit has a main path 10 for supplying secondary air into a space defined in the exhaust pipe 2 between the EHC 3 and the main catalyst 4 when it is determined that the main catalyst 4 is active. The secondary air supply unit may additionally have a second path 9 for supplying secondary air into the exhaust pipe 2 on the upstream side of the EHC 3 when it is determined that the EHC 3 is active, so that the secondary air may pass through the EHC 3 and reach the main catalyst 4.

摘要翻译： 内燃机的排气净化器将二次空气供给到排气管中，而不会冷却也不致使活化的电加热催化剂（EHC）失活。 排气净化器包括设置在排气管2中的EHC 3，设置在EHC 3下游的排气管2中的主催化剂4和用于向排气管2供给二次空气的单元。二次空气供给单元具有 当确定主催化剂4是活性的时，主路径10用于在EHC 3和主催化剂4之间的排气管2中限定的空间中供应二次空气。 二次空气供给单元还可以具有第二路径9，用于在确定EHC 3有效时，在EHC 3的上游侧向排气管2供给二次空气，从而二次空气可以通过EHC 3到达主催化剂4。