公开(公告)号：JPH06229232A

公开(公告)日：1994-08-16

申请号：JP1560293

申请日：1993-02-02

Applicant: TOYOTA MOTOR CORP

Inventor： TAKESHIMA SHINICHI ,  TANAKA TOSHIAKI ,  IGUCHI SATORU

IPC: F01N3/10 ,  F01N3/08 ,  F01N3/18 ,  F01N3/24 ,  F01N13/02 ,  F02D41/02

Abstract: PURPOSE:To inhibit SOX from being absorbed by an NOX absorbent while preventing an NOX absorbent from being poisoned by sulfur. CONSTITUTION:An NOX absorbent 19 for absorbing NOX when the air-fuel ratio of inflow exhaust gas being lean, and for discharging absorbed NOX when the density of oxygen in the exhaust gas being decreased, is located in an engine exhaust passage, and an SOX absorbent 18 for absorbing SOX when the air-fuel ratio of inflow exhaust gas being lean, and for discharging absorbed SOX when it is rich is located in the engine exhaust passage, upstream of the NOX absorbent 19. The air-fuel ratio of the exhaust gas flowing into the SOX absorbent and the NOX absorbent 19 is at first enriched up to a first rich degree, and then is maintained in a rich condition having a degree lower than the first rich degree rich when SOX is discharged from the SOX absorbent and NOX is to be discharged from the NOX absorbent 19.

公开(公告)号：JPH06229230A

公开(公告)日：1994-08-16

申请号：JP1649993

申请日：1993-02-03

Applicant: TOYOTA MOTOR CORP

Inventor： TAKESHIMA SHINICHI ,  TANAKA TOSHIAKI ,  IGUCHI SATORU

IPC: F01N3/08 ,  F01N3/24 ,  F01N13/02 ,  F02D41/04

Abstract: PURPOSE:To inhibit emission of NOX discharged from NOX absorbent, into the atmosphere while preventing the NOX absorbent from being poisoned by sulfur. CONSTITUTION:An NOX absorbent 19 for absorbing NOX in a lean condition and for discharging absorbed NOX in a rich condition is located in an engine exhaust passage, and an SOX absorbent 18 carrying metal having an oxidization- reduction function, for absorbing SOX in a lean condition and for discharging absorbed SOX in a rich condition is located in the engine exhaust gas passage, upstream of the NOX absorbent 19. Means for obtaining a degree of richness adapted to be decreased by the reaction of oxidization-reduction in the SOX absorbent 18 when the air-fuel ratio is set in a rich condition is provided. The degree of rich when the SOX being discharged from the SOX absorbent 18 and NOX 19 being to be discharged from the NOX absorbent 19 is increased by a degree of richness decreased by the reaction of oxidization-reduction.

公开(公告)号：JPH0610725A

公开(公告)日：1994-01-18

申请号：JP19021492

申请日：1992-06-25

Applicant: TOYOTA MOTOR CORP

Inventor： TAKESHIMA SHINICHI ,  TANAKA TOSHIAKI ,  IGUCHI SATORU ,  KATO KENJI ,  KIHARA TETSUO

IPC: F01N3/08 ,  F02D41/02 ,  F02D41/04

Abstract: PURPOSE:To generate the exhaust atmosphere required for the regeneration of catalyst neither too much nor too less by detecting the temperature of NO absorbing and decomposing catalyst arranged in an exhaust passage, and deciding the re-generation time of the catalyst, and changing the exhaust atmosphere in response to the temperature of the catalyst at the time of decision. CONSTITUTION:NOx absorbing and decomposing catalyst 6 for absorbing NOx under the oxidation atmosphere and decomposing NO under the reduction atmosphere is arranged in an exhaust passage 4 of an internal combustion engine 2, which can perform the lean combustion. At this stage, a temperature sensor 10 is provided in the exhaust passage 4 in the upstream side of the catalyst 6 to detect the temperature of the catalyst 6 and the exhaust. A load sensor 12 and. an engine speed sensor 14 are provided to detect the operation condition of the internal combustion engine 2. Furthermore, each detecting signal from each sensor 10, 12, 14 is input to an ECU 8. The ECU 8 decides the re-generation time of the catalyst 6 on the basis of each detecting signal, and controls the drive of an electronic control type fuel injection valve 16 in response to this decision. Air-fuel ratio and further the exhaust atmosphere are thereby changed.

公开(公告)号：JPS62174520A

公开(公告)日：1987-07-31

申请号：JP1373486

申请日：1986-01-27

Applicant: TOYOTA MOTOR CORP

Inventor： HAYASHI KOTARO ,  TANAKA TOSHIAKI

IPC: F01N3/08 ,  F01N3/18 ,  F02B3/06

Abstract: PURPOSE:To prevent the deterioration of an adsorption agent at the time of shifting from a high load condition to an idling condition by providing the adsorption agent in the bypass passage of an exhaust pipe and opening a control valve at the inlet thereof in a predetermined time after detecting the idling condition. CONSTITUTION:An adsorption agent 28 is provided in the bypass passage 26 of an exhaust pipe 22 and the branch part thereof is fitted with a bypass valve 32. The inlet of a connection pipe 30 between the downstream of the adsorption agent 28 in the bypass pipe 26 and an intake pipe 16 is provided with a regenerative valve 34, and an introduction valve 38 is provided at the junction of a secondary intake valve 36 in the upstream of the adsorption agent 28 and the bypass pipe 26. A control device 50 is inputted with signals for opening a throttle valve 21 and the number of engine revolutions. In the predetermined delay of time, said device 50 after judging an engine to be in an idling condition, opens a bypass valve 32, the regenerative valve 34 closes the connection pipe 30 and the introduction valve 38 closes the secondary intake pipe 36. Consequently, even when an engine condition has shifted from a high load to an idling state, exhaust gases flow toward the adsorption agent 28 after a drop in the temperature thereof, and the deterioration of said agent 28 can be prevented.

公开(公告)号：JPS62159715A

公开(公告)日：1987-07-15

申请号：JP128086

申请日：1986-01-09

Applicant: TOYOTA MOTOR CORP

Inventor： HAYASHI KOTARO ,  IMAMURA YOSHIHIKO ,  TANAKA TOSHIAKI

IPC: F01N3/08 ,  F01N3/02 ,  F01N3/18 ,  F02B3/06

Abstract: PURPOSE:To reduce the emission of nitrogen oxides, by providing an adsorbent for adsorbing a malodorous component in an exhaust gas in a bypass pipe branched from an exhaust pipe, and recirculating a part of the exhaust gas to a suction side. CONSTITUTION:A bypass pipe 26 is connected to an exhaust pipe 22, and an odor adsorbent 28 such as active carbon is provided in the bypass pipe 26. A connection pipe 30 is provided to connect the bypass pipe 26 at a position downstream of the adsorbent 28 with a suction pipe 16. A first valve 32 is provided at an upstream connected portion between the exhaust pipe 22 and the bypass pipe 26, and a second valve 34 is provided at a connected portion between the bypass pipe 26 and the connection pipe 30. Both the valves 32 and 34 are driven by a control device 50 through vacuum operated actuators 36 and 44. When an engine is at idling, the valve 32 is rotated to close the exhaust pipe 22, and the valve 34 is rotated to close the connection pipe 30. On the other hand, when an odor trap is regenerated, the valve 32 is rotated to partially open the bypass pipe 26, and the valve 34 is rotated to open the connection pipe 30.

公开(公告)号：JPS62159714A

公开(公告)日：1987-07-15

申请号：JP18186

申请日：1986-01-07

Applicant: TOYOTA MOTOR CORP

Inventor： HAYASHI KOTARO ,  TANAKA TOSHIAKI

IPC: F01N3/08 ,  F01N3/02 ,  F01N3/18

Abstract: PURPOSE:To extend a service life of an adsorbent for adsorbing a malodorous component in an exhaust gas, by providing the adsorbent in a bypass pipe branched from an exhaust pipe, and opening the bypass pipe when an engine is at idling. CONSTITUTION:An exhaust pipe 13 is branched into a main exhaust pipe 14 and a bypass pipe 15 on the way, and these pipes 14 and 15 are joined again. The bypass pipe 15 is constituted of a parallel portion 15b extending in parallel to the main exhaust pipe 14 and having an enlarged-diameter portion on the way and of a joining portion 15c joined to the main exhaust pipe 14. An adsorbent (active carbon or the like) 16 for adsorbing a malodorous component in an exhaust gas is accommodated in the parallel portion 15b. A bypass valve 22 is provided at a connected portion between the main exhaust pipe 14 and the bypass pipe 15. The bypass valve 22 is selectively opened or closed by an actuator 23, and is controlled by ECU50. When it is determined that an engine is at idling from an output from an opening sensor 38 for detecting an accelerator lever opening angle, the ECU50 controls to open the bypass valve 22 to select the open condition of the bypass valve 15.

公开(公告)号：JPS61197753A

公开(公告)日：1986-09-02

申请号：JP3561485

申请日：1985-02-25

Applicant: TOYOTA MOTOR CORP

Inventor： TANAKA TOSHIAKI

IPC: F02B3/06 ,  F02M31/12 ,  F02M31/13 ,  F02N19/04

Abstract: PURPOSE:To prevent increase of consumption power of PTC over an allowable value when intake air amount is large by controlling voltage to be applied to the PTC heater according to the operating condition or current value of the heater. CONSTITUTION:Rated voltage is applied to a PTC heater 6 by opening and closing of a relay switch 7 and a voltage lower than the rated voltage is applied selectively by a relay switch 8 from a battery power source 9 respectively. Opening and closing of the relay switches 7, 8 are made by an electric type control device 10, and until a starter switch 12 is closed, that is, before starting, until the relay switch 7 is closed and the relay switch 8 is opened and the starter switch 12 is closed and after starting, until a predetermined time is passed, the relay switch 7 is opened and the relay switch 8 is closed. Therefore, after starting, voltage lower than the starting rated voltage is applied to the PTC heater and electric resistance value is increased with temperature drop and consumption power is reduced.

公开(公告)号：JPS6176755A

公开(公告)日：1986-04-19

申请号：JP19630484

申请日：1984-09-19

Applicant: Toyota Motor Corp

Inventor： TANAKA TOSHIAKI

IPC: F02M31/12 ,  F02B3/06 ,  F02M31/13

CPC classification number: F02M31/13 ,  F02B3/06 ,  Y02T10/126

Abstract: PURPOSE:To carry out appropriate afterheat, by detecting the temperature of exhaust gas with the use of a temperature sensor disposed in an exhaust passage, and by controlling electrical power fed to an intake-air heating electrical heater in accordance with the temperature of exhaust gas. CONSTITUTION:At step 6, it is determined whether a current Is passing through a positive thermistor 20 is lower than a predetermined value Iss or not. If Is

Abstract translation: 目的：通过使用布置在排气通道中的温度传感器检测废气的温度，并根据排气温度控制供给到进气加热电加热器的电力，进行适当的后热 。 构成：在步骤6中，确定通过正热敏电阻20的电流Is是否低于预定值Is。 如果Is = Is，则是发生柴油发动机高阶爆震的时间，以便将步骤提前到步骤7，在此时刻开始测量余热时间。 如果不是<=预定时间Ish，则是发生白烟的风险的时间，使得步骤前进到步骤11.因此，可以执行适当的后热。

公开(公告)号：JPS6176751A

公开(公告)日：1986-04-19

申请号：JP19629984

申请日：1984-09-19

Applicant: Toyota Motor Corp

Inventor： TANAKA TOSHIAKI

IPC: F02M31/12 ,  F02M31/13

CPC classification number: F02M31/13 ,  Y02T10/126

Abstract: PURPOSE:To aim at greatly simplifying the control system for an intake-air heating device and at reducing the cost thereof, by controlling the energization of an electrical heater for heating intake-air which is connected in parallel to a starter in a power source circuit, in accordance with the opening and closing of a starter switch. CONSTITUTION:An intake-air heating device 3 comprises an air-permeable PTC heater 6 having a grid-like structure. The PCT heater 6 is connected in parallel to a starter 11 in a power source circuit, and is selectively fed with current from a battery source 10 through a stater relay switch 12 which is closed only when the stater switch 13 is closed to energize the starter 11 and the PCT heater 6 during the period of the closing time. With this arrangement it is possible to aim at greatly simplifying the control system for the intake-air heating device and at reducing the cost thereof.

Abstract translation: 目的：为了大大简化进气加热装置的控制系统并降低成本，通过控制用于加热与电源电路中的起动器并联连接的进气的电加热器的通电 ，根据起动开关的打开和关闭。 构成：进气加热装置3包括具有格子状结构的透气性PTC加热器6。 PCT加热器6与电源电路中的起动器11并联连接，并且通过定时继电器​​开关12选择性地馈送来自电池源10的电流，只有当定子开关13闭合以激励起动器时才关闭 11和PCT加热器6。 利用这种布置，可以大大简化进气加热装置的控制系统并降低其成本。

公开(公告)号：JPS6172860A

公开(公告)日：1986-04-14

申请号：JP19371484

申请日：1984-09-14

Applicant: Toyota Motor Corp

Inventor： TANAKA TOSHIAKI ,  TOYODA KEIJI

IPC: F02M31/135

CPC classification number: F02M31/135 ,  Y02T10/126

Abstract: PURPOSE:To solve a problem of a suction heating device being possibly enlarged in size, by installing a venting structural platelike heater in a way of going across part of a suction passage, while constituting the remaining large opening part of the suction passage so as to make it closable selectively by a valve element. CONSTITUTION:This suction heating device 1 comprises a square frame-form heater housing 2 and a square frame-form cover plate 3 to be locked to one side of the former with screws 4 and tightly supports two rectangular platelike PTC heaters 5 in position between them 2 and 3. Each heater is made up into a grilled form in relatively small grill size having a large heating surface area and set up in position between both these heaters 5 and 5 so as to make a rectangular opening part 7 extending across the central part of a suction passage over the whole body partitionable. And, a valve element 11 is installed so as to make this opening part 7 possible to open or close at will, that is, this valve element is designed so as to be on-off driven by a diaphragm device 13 according to an engine running state.

Abstract translation: 目的：为了解决可能扩大的抽吸加热装置的问题，通过安装通气结构的板状加热器以穿过吸入通道的一部分的方式，同时构成吸入通道的剩余大的开口部分，以便 使其通过阀元件选择性地关闭。 构成：该抽吸加热装置1包括方形框形加热器壳体2和方形框形盖板3，用螺钉4锁定在成型机的一侧，并将两个矩形板状PTC加热器5紧紧地支撑在它们之间的位置上 每个加热器以比较小的格栅尺寸形成具有大的加热表面面积并且设置在这两个加热器5和5之间的位置的烤形，以便形成横跨中心部分的矩形开口部分7 的整个身体上的抽吸通道可分割。 并且，安装阀元件11以使该开口部7能够随意地打开或关闭，即，该阀元件被设计成根据发动机运转由隔膜装置13开关驱动 州。