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1. 发明专利

DE4317942C2 未知
公开(公告)号：DE4317942C2
公开(公告)日：1995-02-23
申请号：DE4317942
申请日：1993-05-28
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： UENO SADAYASU , SASAYAMA TAKAO , SUZUKI SEIKO , SATO KANEMASA , OUCHI SHIRO , MINAMI NAOKI , HASEGAWA NORIO
IPC分类号： F02B1/04 , F02D41/14 , F02D41/24 , F02D41/02
摘要： An air fuel ratio detecting arrangement using a diffusion suppressing type air fuel ratio sensor applicable to an air fuel ratio control unit for an internal combustion engine incorporating an atmospheric air pressure correction circuit in a signal processing and outputting device for correcting an output voltage signal processed therein based on a change in atmospheric air pressure which is detected when a predetermined operating condition of an internal combustion engine is satisfied. A secular change correction circuit included in the signal processing and outputting device detects a change in electromotive force of a concentration cell portion of the air fuel ratio sensor when a predetermined rich air fuel ratio is reached and corrects a reference voltage for the air fuel ratio sensor based on the detected change in electromotive force of the concentration cell portion in addition to an air calibration circuit.

2. 发明专利

GB2208549B ANGLE SENSOR FOR THROTTLE VALVE OF INTERNAL COMBUSTION ENGINE 未知
公开(公告)号：GB2208549B
公开(公告)日：1991-10-02
申请号：GB8818175
申请日：1988-07-29
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： KUBOTA MASANORI , UENO SADAYASU , SATO KANEMASA , MIURA KIYOSHI
IPC分类号： F02D11/10 , F02D41/24 , G01B7/30
摘要： Disclosed is a non-contact type throttle angle sensor sensing and converting angular rotation of a throttle valve of an internal combustion engine into an electrical signal. The sensor comprises a magnetic field generating element disposed on one end of a rotatable throttle shaft, a magneto-sensitive element disposed opposite to the field generating element at a position fixed relative to a throttle body and spaced apart from the field generating element, the magneto-sensitive element generating an output whose level changes with the rotation of the throttle valve shaft relative to the throttle body, a housing forming an integral part of the throttle body to accommodate the field generating element and the magneto-sensitive element, and an electrical circuit converting the output of the magneto-sensitive element into an electrical signal, the electrical circuit including a circuit adjusting the zero level and maximum level of the output of the magneto-sensitive element.

3. 发明专利

DE4429769C2 未知
公开(公告)号：DE4429769C2
公开(公告)日：1998-01-29
申请号：DE4429769
申请日：1994-08-22
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： UENO SADAYASU , HASEGAWA NORIO , MINAMI NAOKI , SATO KANEMASA , OOUCHI SHIRO
IPC分类号： F02D45/00 , G01N27/409 , G01N27/41 , G01N27/419 , F02D33/00
摘要： A method and apparatus are disclosed for measuring atmospheric pressure in conjunction with an air-fuel ratio sensor of the type comprising a concentration cell with atmospheric air and exhaust electrodes on opposite sides of a solid-state electrolyte having oxygen ion conductivity. During an atmospheric pressure measuring cycle, oxygen ions are pumped from the atmospheric air electrode to the exhaust electrode, in a quantity which is either predetermined at a fixed value, or is sufficient to bring the cell to an equilibrium state. Atmospheric pressure is then calculated from measured emf of the cell, using an experimentally derived functional relationship. In a second embodiment, ions are pumped until a predetermined change of the concentration cell emf is achieved, and atmospheric pressure is determined based on the amount of time required to achieve such change. The atmospheric pressure measuring mode is operated on a time shared basis with the air-fuel ration detection mode.

4. 发明专利

DE4429769A1 Air/fuel ratio sensor 未知
公开(公告)号：DE4429769A1
公开(公告)日：1995-02-23
申请号：DE4429769
申请日：1994-08-22
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： UENO SADAYASU , HASEGAWA NORIO , MINAMI NAOKI , SATO KANEMASA , OOUCHI SHIRO
IPC分类号： F02D45/00 , G01N27/409 , G01N27/41 , G01N27/419 , F02D33/00
摘要： A predetermined quantity of oxygen molecules, or a sufficient quantity for an equilibrium state to be reached, is pumped from the electrode (1) on the external air side into the vicinity of the electrode (3) on the exhaust side, the electromotive force of the concentration cell between the two electrodes being detected and the external air pressure being obtained by inputting the electromotive force into a correlation between the external air pressures and the electromotive forces, which correlation is determined beforehand by an experiment. Oxygen molecules are pumped from the electrode (1) into the vicinity of the electrode (3) until the change in the electromotive force of the concentration cell reaches a predetermined value. The external air pressure is obtained by inputting the required time into a correlation between the external air pressure for various amplitudes and the required time.

5. 发明专利

DE69116435T2 未知
公开(公告)号：DE69116435T2
公开(公告)日：1996-08-14
申请号：DE69116435
申请日：1991-05-24
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： TSUCHITANI SHIGEKI , SUZUKI SEIKO , MIKI MASAYUKI , TANAKA TOMOYUKI , MATSUMOTO MASAHIRO , ICHIKAWA NORIO , EBINE HIROMICHI , SUGISAWA YUKIKO , SATO KANEMASA , UENO SADAYASU , ASANO YASUHIRO , KUBOTA MASANORI , SUZUKI MASAYOSHI
IPC分类号： G01P1/00 , G01P15/125 , G01P15/13
摘要： A semiconductor acceleration sensor (1) is formed by a cantilever (4) having a conductive movable electrode (5) of predetermined mass at one end, at least one pair of fixed conductive electrodes (8, 9) which are stationary with respect to the movable electrode (5) located on opposing sides of the movable electrode, and gaps provided between the movable electrode and the fixed electrodes. To prevent the movable electrode becoming fused to the contacted fixed electrode, in a first aspect of this invention, an insulating layer (6) is provided between the movable electrode and fixed electrodes, the layer being either on the movable electrode or on the fixed electrodes and in a second aspect of this invention the movable electrode or, preferably, the fixed electrodes, are formed of a high melting point material. In such a second aspect, to improve adhesion between the high melting point material and a substrate (3a, 3b) to which the fixed electrodes (8 min , 9 min ) are mounted, a lower melting point material is firstly coated on said substrates. In a feature of the invention, a detector unit processing circuit (Figure 20) is described in which the output characteristic of the circuit may be digitally adjusted by suitable switching of a plurality of resistors (Rs, Rf), and in a second feature, the sensor chip and the detector unit integrated circuit are located on a common base (303) and mounted in a hermetically sealed chamber to prevent adverse environmental effects affecting operation of the sensor and detector unit assembly. A gas having a dew point of -40 DEG C or lower is, advantageously, charged into the hermetically sealed chamber.

6. 发明专利

DE4317942A1 未知
公开(公告)号：DE4317942A1
公开(公告)日：1993-12-02
申请号：DE4317942
申请日：1993-05-28
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： UENO SADAYASU , SASAYAMA TAKAO , SUZUKI SEIKO , SATO KANEMASA , OUCHI SHIRO , MINAMI NAOKI , HASEGAWA NORIO
IPC分类号： F02B1/04 , F02D41/14 , F02D41/24 , F02D41/02
摘要： An air fuel ratio detecting arrangement using a diffusion suppressing type air fuel ratio sensor applicable to an air fuel ratio control unit for an internal combustion engine incorporating an atmospheric air pressure correction circuit in a signal processing and outputting device for correcting an output voltage signal processed therein based on a change in atmospheric air pressure which is detected when a predetermined operating condition of an internal combustion engine is satisfied. A secular change correction circuit included in the signal processing and outputting device detects a change in electromotive force of a concentration cell portion of the air fuel ratio sensor when a predetermined rich air fuel ratio is reached and corrects a reference voltage for the air fuel ratio sensor based on the detected change in electromotive force of the concentration cell portion in addition to an air calibration circuit.

7. 发明专利

DE69116435D1 未知
公开(公告)号：DE69116435D1
公开(公告)日：1996-02-29
申请号：DE69116435
申请日：1991-05-24
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： TSUCHITANI SHIGEKI , SUZUKI SEIKO , MIKI MASAYUKI , TANAKA TOMOYUKI , MATSUMOTO MASAHIRO , ICHIKAWA NORIO , EBINE HIROMICHI , SUGISAWA YUKIKO , SATO KANEMASA , UENO SADAYASU , ASANO YASUHIRO , KUBOTA MASANORI , SUZUKI MASAYOSHI
IPC分类号： G01P1/00 , G01P15/125 , G01P15/13
摘要： A semiconductor acceleration sensor (1) is formed by a cantilever (4) having a conductive movable electrode (5) of predetermined mass at one end, at least one pair of fixed conductive electrodes (8, 9) which are stationary with respect to the movable electrode (5) located on opposing sides of the movable electrode, and gaps provided between the movable electrode and the fixed electrodes. To prevent the movable electrode becoming fused to the contacted fixed electrode, in a first aspect of this invention, an insulating layer (6) is provided between the movable electrode and fixed electrodes, the layer being either on the movable electrode or on the fixed electrodes and in a second aspect of this invention the movable electrode or, preferably, the fixed electrodes, are formed of a high melting point material. In such a second aspect, to improve adhesion between the high melting point material and a substrate (3a, 3b) to which the fixed electrodes (8 min , 9 min ) are mounted, a lower melting point material is firstly coated on said substrates. In a feature of the invention, a detector unit processing circuit (Figure 20) is described in which the output characteristic of the circuit may be digitally adjusted by suitable switching of a plurality of resistors (Rs, Rf), and in a second feature, the sensor chip and the detector unit integrated circuit are located on a common base (303) and mounted in a hermetically sealed chamber to prevent adverse environmental effects affecting operation of the sensor and detector unit assembly. A gas having a dew point of -40 DEG C or lower is, advantageously, charged into the hermetically sealed chamber.

8. 发明专利

GB2208549A ANGLE SENSOR FOR THROTTLE VALVE OF INTERNAL COMBUSTION ENGINE 未知
公开(公告)号：GB2208549A
公开(公告)日：1989-04-05
申请号：GB8818175
申请日：1988-07-29
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： KUBOTA MASANORI , UENO SADAYASU , SATO KANEMASA , MIURA KIYOSHI
IPC分类号： F02D11/10 , F02D41/24 , G01B7/30
摘要： Disclosed is a non-contact type throttle angle sensor sensing and converting angular rotation of a throttle valve of an internal combustion engine into an electrical signal. The sensor comprises a magnetic field generating element disposed on one end of a rotatable throttle shaft, a magneto-sensitive element disposed opposite to the field generating element at a position fixed relative to a throttle body and spaced apart from the field generating element, the magneto-sensitive element generating an output whose level changes with the rotation of the throttle valve shaft relative to the throttle body, a housing forming an integral part of the throttle body to accommodate the field generating element and the magneto-sensitive element, and an electrical circuit converting the output of the magneto-sensitive element into an electrical signal, the electrical circuit including a circuit adjusting the zero level and maximum level of the output of the magneto-sensitive element.

9. 发明专利

DE3826408A1 未知
公开(公告)号：DE3826408A1
公开(公告)日：1989-02-16
申请号：DE3826408
申请日：1988-08-03
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： KUBOTA MASANORI , UENO SADAYASU , SATO KANEMASA , MIURA KIYOSHI
IPC分类号： F02D11/10 , F02D41/24 , G01B7/30
摘要： Disclosed is a non-contact type throttle angle sensor sensing and converting angular rotation of a throttle valve of an internal combustion engine into an electrical signal. The sensor comprises a magnetic field generating element disposed on one end of a rotatable throttle shaft, a magneto-sensitive element disposed opposite to the field generating element at a position fixed relative to a throttle body and spaced apart from the field generating element, the magneto-sensitive element generating an output whose level changes with the rotation of the throttle valve shaft relative to the throttle body, a housing forming an integral part of the throttle body to accommodate the field generating element and the magneto-sensitive element, and an electrical circuit converting the output of the magneto-sensitive element into an electrical signal, the electrical circuit including a circuit adjusting the zero level and maximum level of the output of the magneto-sensitive element.

10. 发明专利

JPH06118053A AIR-FUEL RATIO SENSOR 失效
公开(公告)号：JPH06118053A
公开(公告)日：1994-04-28
申请号：JP26842892
申请日：1992-10-07
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： SATO KANEMASA , UENO SADAYASU , OUCHI SHIRO , MINAMI NAOKI
IPC分类号： G01N27/409
摘要： PURPOSE:To improve the heat conductivity from a heater to zirconia electrolyte by inserting a heat resisting fibrous material such as glass fiber or a metallic material such as a metal leaf spring between the zirconia solid electrolyte and the heater to fill the space. CONSTITUTION:An inside electrode 3 consisting of platinum is formed on the inside of a bag tube zirconia solid electrolyte (cell) 2 in the detecting part 1 of a sensor, and a platinum outside electrode 4 is similarly formed on the outside. A diffusive film 5 consisting of a magnesia spinel is formed on the outside thereof. Each electrode is drawn to the opened end part of the cell, and drawn by a lead 6 through a drawing electrode part. To the inside of the cell 2, a pipe heater 7 is inserted up to the top end part. The purpose of the heater 7 is to effectively heat the zirconia solid electrolyte inner part 10 corresponding to the effective electrode area part on the outside of the cell 2 in the detecting part as much as possible. Therefore, an elastic heat conductor 12 such as a glass fiber or leaf spring is inserted to the gap part 0.2-0.3mm between the solid electrode (cell) 2 and the heater 7 to fill the space, and heat conductivity is improved.

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