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91. 发明专利

JPH10115218A CONNECTION STRUCTURE FOR PIPE 失效
公开(公告)号：JPH10115218A
公开(公告)日：1998-05-06
申请号：JP26730996
申请日：1996-10-08
申请人： TOYOTA MOTOR CORP
发明人： HARADA KENICHI
IPC分类号： F01N13/08 , F16B7/04 , F01N7/08
摘要： PROBLEM TO BE SOLVED: To improve interruptibility between passages formed inside a pipe by eliminating a gap between connection side ends of partition plates partitioning the pipe. SOLUTION: With this connection structure, a first pipe 10 having a plurality of passages 32, 34 partitioned by means of a first partition plate 30 is connected to a second pipe 16 having a plurality of passages 38, 40 partitioned by a second partition plate 36. A connection side end 42 of one of the partition plates is bent. A bent portion 44 is in contact with a connection side end 46 of the other partition plate. The connection side ends 42, 46 are brought into close contact with each other by elasticity of the bent portion 44.

92. 发明专利

JPH08189332A MUFFLER FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH08189332A
公开(公告)日：1996-07-23
申请号：JP222195
申请日：1995-01-10
申请人： TOYOTA MOTOR CORP
发明人： HARADA KENICHI
IPC分类号： F01N1/02 , F01N1/08 , F01N13/08 , F02D9/04 , F01N7/08
摘要： PURPOSE: To exhibit optimal noise eliminating effect in all operating ranges. CONSTITUTION: A muffler for an internal combustion engine is provided with a first chamber 1 on which an exhaust leading-in pipe 4, a third chamber 3 on which an exhaust leading-out pipe 5 is opened, a second chamber 2 which is arranged between the first chamber 1 and the third chamber 3, and an inner pipe 6 by which the first chamber 1 and the third chamber 3 are communicated with each other, the first chamber 1 is communicated with the second chamber 2 through the first communicating pipe 8, and the second chamber 2 is communicated with the third chamber 3 through a second communicating pipe 9, and an opening/closing valve 7a for opening/closing forcibly according to an engine operating condition is provided in an inner pipe 6. An opening/closing valve for opening automatically by exhaust gas pressure is provided in the outlet of the second communicating pipe 9.

93. 发明专利

JPH0842336A MANUFACTURE FOR CORROSION RESISTANT MUFFLER 失效
公开(公告)号：JPH0842336A
公开(公告)日：1996-02-13
申请号：JP18117594
申请日：1994-08-02
申请人： TOYOTA MOTOR CORP , FUTABA SANGYO KK
发明人： HARADA KENICHI , AKIYAMA MASATERU , OGAWA SUMIO , MARUMOTO IKURO , MIZOGUCHI YOSHIO
IPC分类号： F01N1/08 , F01N1/10 , F01N13/18 , F01N7/18
摘要： PURPOSE:To provide a method for producing a corrosion resistant muffler for attaining noise absorption and sound insulation by filling and outer pipe provided on the outer periphery part of an outlet pipe with a noise absorbing material without the fusion loss of the noise absorbing material, and by bending and welding works in a production process. CONSTITUTION:In an outer pipe attaching process, the other end of an outer pipe 8 with its one end opened is fixed to the periphery of the small hole opened part 4 of an outlet pipe 4. In a frame assembling process, an inlet pipe 1 and the outlet pipe 4, are attached to an inner plate 6 and an outer plate 5 disposed in a muffler, and inner pipes 2 and 3 are attached, if necessary. In a coating process, the front and back surfaces of a member forming a frame are coated with a corrosion resistant material and burnt. In a noise absorbing material filling process, a part between the outlet pipe 4 and the outer pipe 8 is filled with a noise absorbing material 9. In an outer pipe diameter reducing process, the diameter of one end of the outer pipe 8 is reduced. In a final process, an outer shell is cylindrically attached to the periphery of the frame.

94. 发明专利

JPH07324617A ELECTRIC HEATING TYPE CATALYST DEVICE 失效
公开(公告)号：JPH07324617A
公开(公告)日：1995-12-12
申请号：JP11667994
申请日：1994-05-30
申请人： TOYOTA MOTOR CORP
发明人： HARADA KENICHI
IPC分类号： F01N3/20 , F01N3/24 , F01N9/00 , F01N11/00 , F01N13/02 , F02D41/04 , F02D41/22
摘要： PURPOSE:To prevent excessive increase in the temperature of a catalyst when an electric heating type catalyst device breaks down because of abnormal electric conduction. CONSTITUTION:An electronic control unit 30 is provided to detect the abnormal conduction of the heater 9 of a catalyst 3 due to the welding of a contact of the conduction switch 30 of an electric heating type catalyst device 3. When electricity is abnormally carried, the electronic control unit 30, when the speed of an engine 1 exceeds a specified upper limit, which is determined according to the opening degree of a throttle valve, stops the fuel injection from a fuel injection valve 17 to control the speed of the engine under the specified upper limit. By this constitution, the volume of the air exhausted from the engine is reduced, lowering the calorie given to a catalyst 7 by air exhaust, resulting in the prevention of increase in the temperature of the catalyst.

95. 发明专利

JPH07158435A EXHAUST PIPE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH07158435A
公开(公告)日：1995-06-20
申请号：JP30528793
申请日：1993-12-06
申请人： TOYOTA MOTOR CORP
发明人： SHIMOJI KOJI , HARADA KENICHI
IPC分类号： F01N13/08 , F01N13/18 , F01N7/08 , F01N7/18
摘要： PURPOSE:To reduce the manufacturing cost of an exhaust pipe of double pipe structure for an internal combustion engine. CONSTITUTION:An exhaust pipe for an internal combustion engine is provided with an outer pipe 1 with a flange 4 welded at least to one end part thereof, an inner pipe 2 disposed almost concentrically with a specified clearance 5 to the outer pipe 1, and a clearance keeping member 6 disposed between the outer pipe 1 and the inner pipe 2 at least at one end part in order to keep the specified clearance 5. In this case, the flange 4 and the clearance keeping member 6 are simultaneously welded to the outer pipe 1 by single welding.

96. 发明专利

JPH0771304A CONTROLLER OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0771304A
公开(公告)日：1995-03-14
申请号：JP1854094
申请日：1994-02-15
申请人： TOYOTA MOTOR CORP
发明人： OI YASUHIRO , FURUHASHI MICHIO , SAWAMOTO HIROYUKI , ONAKA HIDEMI , TANAKA HIROSHI , HARADA KENICHI
IPC分类号： F01N3/20 , F01N9/00 , F02D21/08 , F02D41/06 , F02D41/14 , F02D45/00 , F02M25/07
摘要： PURPOSE:To start accurate air fuel ratio feedback control for warming-up condition by estimating the temperature condition of an internal combustion engine from the integrated value of the temperature of cooling water at the time of starting and the value corresponding to the quantity of inlet air from starting time, and by thus controlling the temperature of the engine. CONSTITUTION:When an engine is not yet started at a step 100, water temperature is read at a step 101 and the integrated value of the quantity of inlet air for judging feedback starting is determined from a map at a step 102 and is set. After the engine is started, it is judged at a step 103 whether it is during fuel cut or not, and when during cut, the routine is finished at a step 107 to hold the value before cut. When it is not during cut, the quantity of inlet air is integrated at a step 104, and the integrated value is compared with the integrated value of the quantity of air for judging feedback starting before engine start, and when the former is larger, it is judged as after warming-up, and feedback control is started at a step 106, and when the latter is larger, feedback control is not carried out at a step 108. The cost can be reduced while degradation of fuel consumption and emission can be prevented.

97. 发明专利

JPH0734865A DOUBLE EXHAUST PIPE 失效
公开(公告)号：JPH0734865A
公开(公告)日：1995-02-03
申请号：JP18458793
申请日：1993-07-27
申请人： TOYOTA MOTOR CORP
发明人： SHIMOJI KOJI , IWATA MINORU , HARADA KENICHI
IPC分类号： F01N13/08 , F01N13/14 , F01N13/18 , F01N7/08
摘要： PURPOSE:To suppress interference between inner and outer pipes in a double exhaust pipe having a bent portion by eliminating extention at an inlet of exhaust gas before reaching the bent portion, and thereby suppressing shifting of the bent portion of the inner pipe. CONSTITUTION:A sliding portion 22 is formed on an upstream end of a bent portion 20 of an inner pipe 4 and a part between the inner pipes 4 and 6. A sliding portion 26 is formed on a downstream end of the bent portion 20 of the inner pipe 4, and a part between the inner pipe 4 and an outer pipe 2 of a straight portion 18 in the vicinity of an outlet 10 for exhaust gas. Thermal expansion difference between the inner pipes 4, 6 in the longitudinal direction of a straight portion 16 and the outer pipe 2 is eliminated by the sliding portion 22 on the upstream end of the bent portion 20 of the inner pipe 4 including the bent portion 20. Thermal expansion difference between the inner pipe 4 in the longitudinal direction of the straight portion 18 and the outer pipe 2 is eliminated by the sliding portion 26 on the downstream end of the bent portion 20 of the inner pipe 4 including the bent portion 20. Interference between the inner pipe 4 and the outer pipe 2 is hard to occur at the bent portion 20 and generation of abnormal noises is reduced.

98. 发明专利

JPH0626426A FUEL INJECTION DEVICE OF INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH0626426A
公开(公告)日：1994-02-01
申请号：JP17988992
申请日：1992-07-07
申请人： TOYOTA MOTOR CORP
发明人： HARADA KENICHI
IPC分类号： F02M69/00 , F02M69/04
摘要： PURPOSE:To prevent shortage of intake at the time of stopping atomization due to the state of an engine by making only a first air supply passage or a second air supply passage in the communicating state at the time of practicing or stopping atomization of fuel in accordance with the state of the engine. CONSTITUTION:A first air supply passage 9 to communicate an air supply source and the neighborhood of a nozzle hole la of a fuel injection valve l and a second air supply passage 10 to communicate the downstream side of a throttle valve 5 are furnished. A blocking means 8 to block of the first and second air supply passages 9, 10 to make the other only in the communicating state is furnished. Additionally, a first control means to control the blocking means 8 to make only the first air supply passage 9 in the communicating state at the time to practice atomization of fuel in accordance with the state of an engine and to make only the second air supply passage 10 in the communicating state at the time to stop atomization of fuel in accordance with the state of the engine is furnished. Consequently, it is possible to prevent shortage of suction air at the time of stopping atomization.

99. 发明专利

JPH05332172A PARTIAL OPERATION CONTROL DEVICE OF ENGINE 失效
公开(公告)号：JPH05332172A
公开(公告)日：1993-12-14
申请号：JP13645992
申请日：1992-05-28
申请人： TOYOTA MOTOR CORP
发明人： HARADA KENICHI
IPC分类号： F02D9/02 , F02D17/02 , F02D41/02 , F02D43/00 , F02P5/15
摘要： PURPOSE:To solve torque shortage caused when cylinder reducing operation is started by providing such means as increasing the opening degree of a throttle valve, and also delaying an ignition timing, when operating range is transferred from all cylinder operating range to cylinder reducing operating range. CONSTITUTION:The cylinder of an engine is divided into a plurality of pairs, and it is separately operated so as to stop operation of the cylinder in a specified pair. In this case, a throttle valve (a) is driven by an actuator (b). On the other hand, the optimal ignition timing of the engine is calculated by a means (c). It is judged by a means (d) whether operating condition of the engine is in an all cylinder operating range or a cylinder reducing operating range. As a result, when it is judged that it is in the cylinder reducing operating range at the time of all cylinder operation, the throttle valve (a) is controlled by a means (e) so as to increase the opening degree thereof. Simultaneously, an ignition timing is delayed by a means (f) so as to suppress increasing of an engine torque. After lapse of the prescribed time, the delay angle of the ignition timing is released by a means (g) and also operation of the cylinder in the specified pair is stopped by a means (h).

100. 发明专利

JPH05223020A EVAPORATED FUEL DISPOSAL DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH05223020A
公开(公告)日：1993-08-31
申请号：JP2276192
申请日：1992-02-07
申请人： TOYOTA MOTOR CORP
发明人： HARADA KENICHI
IPC分类号： F02M25/08
摘要： PURPOSE:To efficiently carry out adsorption and separation of fuel by alternately connecting an evaporated fuel disposal device to two canisters in an internal combustion engine. CONSTITUTION:Two canisters 10, 12 are provided. A selector valve 22 changes over a fuel tank between the canisters 10, 12, and a selector valve 30 changes over a purge port 33 between the canisters 10, 12. Heaters 20a, 20b are provided in the canisters 10, 12, respectively. A switch 60 changes over the heaters. In a first trip, evaporated fuel is adsorbed and separated in the canister 10, and the heater 20a is energized. Until a fist soaking after stopping, adsorption is made in the canister 12 which has been rested until then. In the next operation (second trip), evaporated fuel is adsorbed and separated in the canister 12, and the heater 20b is energized. Until a second soaking after stopping, adsorption is carried out in the canister 10 which has been rested until then.

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