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1. 发明专利

JP2000257418A EXHAUST SILENCER 失效
公开(公告)号：JP2000257418A
公开(公告)日：2000-09-19
申请号：JP5858699
申请日：1999-03-05
申请人： SANGO CO LTD , TOYOTA MOTOR CORP
发明人： WAKAMATSU SHIGEKI , YOKOI MASAYUKI , IMAGAWA TOSHIYUKI , KONDO TEI
IPC分类号： F01N1/08 , F01N1/10 , F01N3/24 , F01N13/02 , F01N13/08 , F01N7/02 , F01N7/08
摘要： PROBLEM TO BE SOLVED: To obtain high silencer effect when exhaust gas flow rate is low, while maintaining power performance when exhaust gas flow rate is high, in a exhaust silencer where a sub muffler is provided between a catalyst converter and a main muffler. SOLUTION: A sub muffler 2 is provided between a catalyst converter 1, which purifies exhaust gas and a main muffler 3 which reduces exhaust noise. An expansion chamber is provided in the sub muffler 2 and a valve device 9 which makes a flow path area of exhaust gas variable is provided between the expansion chamber and the catalyst converter 1. With this configuration, silencer operates immediately after exhaust noise is generated with increased energy after being heated up inside the catalyst converter. For instance, when an exhaust gas flow is low, flow path area of the exhaust gas is controlled to be smaller by the valve device 9 and expansion ratio with regard to the expansion chamber of the sub muffler 2 is made larger.

2. 发明专利

JPH10153116A SEPARATING STRUCTURE OF EXHAUST PIPE 失效
公开(公告)号：JPH10153116A
公开(公告)日：1998-06-09
申请号：JP31184896
申请日：1996-11-22
申请人： TOYOTA MOTOR CORP
发明人： IMAGAWA TOSHIYUKI
IPC分类号： F01N13/08 , F01N13/10 , F16L9/18 , F01N7/08 , F01N7/10
摘要： PROBLEM TO BE SOLVED: To suppress generation of cracking on both end parts of a diaphragm in the width direction so as to improve durability by arranging a protecting member for covering an upstream end of the diaphragm, in a separating structure of an exhaust pipe whose cross section is divided into two pieces by the diaphragm. SOLUTION: An cross section of an exhaust pipe 12 is divided into two pieces by a diaphragm 11, exhaust gas flows from, for example, #1 and #4 cylinders of an engine into one passage to be divided, and exhaust gas flows from #2 and #3 cylinders of the engine into the other passage. An upstream end of the diaphragm 11 is covered with a protecting member 13. In a connecting part of an exhaust manifold 14 of the exhaust pipe 12, a spherical joint 15 formed by interposing a seal bearing 18 is arranged between a flare flange 16 formed on an upstream end of the exhaust pipe 12 and a flange 17 formed on a downstream end side of the exhaust manifold 14. The protecting member 13 is arranged so as to cover an upstream side end of a part which extends in the exhaust pipe diametrical direction of the diaphragm 11 from the upstream side, and a clearance for releasing a thermal expansion difference between the protecting member 13 and the diaphragm 11 is arranged between the protecting member 13 and the diaphragm 11.

3. 发明专利

JPH0533628A EXHAUST SILENCER 失效
公开(公告)号：JPH0533628A
公开(公告)日：1993-02-09
申请号：JP20873691
申请日：1991-07-26
申请人： TOYOTA MOTOR CORP , AISIN TAKAOKA LTD
发明人： IMAGAWA TOSHIYUKI , SAKUMA HIROHIDE , NAWATA EIJI
IPC分类号： F01N1/08 , F01N1/06 , F01N1/12 , F01N3/28 , F01N13/10 , F02B27/04
摘要： PURPOSE:To decrease resistance of exhaust gas and attenuate pulsation of exhaust gas in an exhaust silencer whose exhaust manifold and muffler are integrated. CONSTITUTION:In an exhaust silencer whose exhaust manifold and muffler are integrated, a manifold pipe 11 of the exhaust manifold is offset and opened to the first expanding chamber 22 of a muffler body, and the manifold pipe 11 is disposed in parallel, between which a swirl pipe 29 is disposed. Exhaust gas which flows from the manifold pipe 11 to the first expanding chamber 22 generates a swirling flow in the first expanding chamber 22, and the swirl pipe 29 accerelates this swirling and sucks the exhaust gas, so that the exhaust gas flows smoothly and the flow resistance of the exhaust gas noise eliminator is reduced. Because the manifold pipe 11 is disposed in parallel, the pressure wave of pulsation works as a reflected wave against the respective manifold pipes so as to reduce exhaust gas pulsation and promote silencing.

4. 发明专利

JPH0559928A NOISE REDUCTION DEVICE 失效
公开(公告)号：JPH0559928A
公开(公告)日：1993-03-09
申请号：JP22294191
申请日：1991-09-03
申请人： TOYOTA MOTOR CORP
发明人： OGAWA SUMIO , IMAGAWA TOSHIYUKI
IPC分类号： F01N1/02
摘要： PURPOSE:To miniaturize the overall structure of a device, while absorbing noise favorably regardless of the frequency of the noise, in a noise reduction device for absorbing pulsation noise in the fluid passage. CONSTITUTION:A vibration plate 8 is fixed on one end of a plate spring 10 so as to absorb pulsation noise of exhaust gas in the exhaust passage of an internal combustion engine. The plate spring 10 is supported between a pair of supporting rollers 14 installed on a spring plate supporting movable member 12. The position of the movable member 12 is controlled by a stepping motor 20 so as to match the intrinsic vibration number of the plate spring 10 with the primary frequency of exhaust pulsation noise generated by explosive combustion of an engine main body.

5. 发明专利

JPH0559927A NOISE REDUCTION DEVICE 失效
公开(公告)号：JPH0559927A
公开(公告)日：1993-03-09
申请号：JP22007491
申请日：1991-08-30
申请人： TOYOTA MOTOR CORP
发明人： OGAWA SUMIO , IMAGAWA TOSHIYUKI
IPC分类号： F01N1/00 , G10K11/16 , G10K11/178
摘要： PURPOSE:To reduce noise favorably while suppressing consumption power of a speaker to a low level, in a noise reduction device formed in such a construction that sound wave of antiphase generated by a speaker is superposed on noise generated in a fluid passage. CONSTITUTION:A resonance chamber 4 is connected to the exhaust passage 1 of an internal combustion engine through a resonance pipe 3. The resonator 8 of Helmholtz type is formed by the resonance pipe 3 and the resonance chamber 4. Frequency (fn) and phase (PHIn) in premary frequency component of exhaust noise due to explosive combustion of an engine main unit are calculated on the basis of the output signals of a crank angle sensor 20 and a top dead point detecting sensor 21. The position of a resonance frequency variable piston 14 is controlled so as to equalize the resonance frequency of the resonator 8 to the primary frequency (fn) of noise. Sound wave having the same frequency as the primary frequency component of noise and antiphase is generated from a speaker 6, and the sound wave is made resonant and amplifed in the resonator 8 and the amplified sound wave is superposed on exhaust noise.

6. 发明专利

JPH10196358A EXHAUST PIPE DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH10196358A
公开(公告)日：1998-07-28
申请号：JP310397
申请日：1997-01-10
申请人： TOYOTA MOTOR CORP
发明人： SHIMOJI KOJI , TAKANO MASANORI , IMAGAWA TOSHIYUKI
IPC分类号： F01N13/08 , F16L27/12 , F01N7/08
摘要： PROBLEM TO BE SOLVED: To provide an exhaust pipe device for an internal combustion engine to prevent a twist from being applied on a vibration cut-off mechanism. SOLUTION: An exhaust pipe device 1 for an internal combustion engine comprises exhaust pipes 7, 8, and 9 connected to a transversely mounted internal combustion engine 13 and having a bend 15 obliquely bending in the direction of the width of a vehicle, and vibration cut-off mechanism 12 and 9 arranged midway of an exhaust system. The vibration cut-off mechanisms 12 and 9 are arranged on or right in the vicinity of the inertia main shaft 11 of the exhaust pipe device 1, and the axial directions of the vibration cut-off mechanism 12 and 9 are made to approximately coincide with a position within a vertical surface containing an internal main shaft 11.

7. 发明专利

JPH051529A EXHAUST DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH051529A
公开(公告)日：1993-01-08
申请号：JP15691491
申请日：1991-06-27
申请人： TOYOTA MOTOR CORP
发明人： HOSOMI MIKIYA , TAMURA SADATOSHI , IMAGAWA TOSHIYUKI , SEGAWA HARUHIKO
IPC分类号： F01N13/00 , F01N99/00
摘要： PURPOSE:To improve the vibration durability strength for an exhaust device for an internal combustion engine of a constitution in which an expansion chamber, a catalyst, and a sound eliminating chamber are disposed in a side part of the internal combustion engine. CONSTITUTION:An exhaust device comprises an expansion chamber 22, a catalyst 30, and a sound eliminating chamber 25 disposed in parallel in order to be almost in parallel to a crank shaft of a slant engine 10 just under an exhaust port of the engine. The catalyst 30 is disposed at a center position between the expansion chamber 22 and the sound eliminating chamber 25, and a support member 35 is provided for the catalyst 30 to be supported by the engine 10 directly.

8. 发明专利

JPH0566781A NOISE REDUCER 失效
公开(公告)号：JPH0566781A
公开(公告)日：1993-03-19
申请号：JP22611791
申请日：1991-09-05
申请人： TOYOTA MOTOR CORP
发明人： OGAWA SUMIO , IMAGAWA TOSHIYUKI
IPC分类号： F01N1/00 , F01N1/06 , G10K11/16 , G10K11/178
摘要： PURPOSE:To reduce a noise satisfactorily as suppressing power consumption in the generation of a ripple in a noise reducer in which a ripple with negative phase is superimposed on the noise generated in a fluid path. CONSTITUTION:A diaphragm 8 to supply the ripple to exhaust gas in the exhaust path 1 of an internal combustion engine is fixed on one terminal of a lead spring 10. The leaf spring 10 is supported between a pair of supporting rollers 14 mounted on a movable member 12 for leaf spring supporting. An excitator 16 is assembled in the movable member 12. The position of the movable member 12 is controlled so as to conform the proper frequencies of the diaphragm 8 and the flat spring 10 to the primary frequency of an exhaust noise due to the explosion and burning of an engine main body. The excitator 16 excites the diaphragm 8 so as to be set at the frequency equivalent to the primary frequency component of the noise and also at the negative phase. Amplitude can be amplified by the resonance of an excited diaphragm 8.

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