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1. 发明专利

JPH04191667A PEAK HOLDING CIRCUIT 失效
公开(公告)号：JPH04191667A
公开(公告)日：1992-07-09
申请号：JP32162790
申请日：1990-11-26
申请人： TOYOTA MOTOR CORP , FUJITSU TEN LTD , NIPPON DENSO CO
发明人： MATSUMOTO SHINICHI , ANPO MASAHARU , MIWA SHOHEI , MURAKAMI KENJI
IPC分类号： G01R19/00 , G01R19/04 , H03K5/153 , H03K5/1532
摘要： PURPOSE:To shorten the response delay time of a comparator by obtaining the comparing reference signal of the comparator by the resistance-type potential division of the output signal of the comparator. CONSTITUTION:The cathode of a diode 4 constituting a comparator 2 along with an operational amplifier 3 is connected to a peak holding condenser 6 through resistors 11, 12 connected in series and the common joint of the resistors 11, 12 is connected to the inverted input terminal of the operational amplifier 3. Input voltage and comparing reference voltage are compared by the operational amplifier 3 and the high level output of the comparator is subjected to resistance-type potential division to be fed back to the inverted input terminal and the condenser 6 is charged with a predetermined time constant. In this case, the comparing reference voltage has a value higher by an extent corresponding to a specific item contained as compared with a conventional peak holding circuit.

2. 发明专利

JPH03221877A FAULT DETECTING CIRCUIT FOR PEAK HOLD CIRCUIT 失效
公开(公告)号：JPH03221877A
公开(公告)日：1991-09-30
申请号：JP1662690
申请日：1990-01-26
申请人： FUJITSU TEN LTD , TOYOTA MOTOR CORP
发明人： MIWA SHOHEI , TACHIBANA MINORU
IPC分类号： G01R31/28 , G01M15/00 , G01R31/00
摘要： PURPOSE:To perform a fault detection for single peak hold circuit with high accuracy by reading out the output voltage level of peak hold circuit at the time immediately after a sampling period is finished and at the time point when a scheduled time is elapsed therefrom, and inspecting the leak characteristic based on two voltage levels. CONSTITUTION:By a processing circuit 13 in a knock control device 1, the output voltage V1 of peak hold circuit 31 at the times t2, t4 when a knock deciding section W0 is finished and the output voltage level V2 of circuit 31 at the times t9, t10 when a previously settled time W1 is elapsed from the times t2, t4 before the times t5, t6 outputting a reset signal, are subjected to make an A/D conversion for reading-out. When the voltage levels V1, V2 are the same, the circuit 31 is concluded as normal by the circuit 13, and an usual ignition time control is performed. If the voltage levels V1, V2 are different, the circuit 31 is judged as faulty.

3. 发明专利

JPH07103061A KNOCKING DETECTING DEVICE FOR INTERNAL COMBUSTION ENGINE 失效
公开(公告)号：JPH07103061A
公开(公告)日：1995-04-18
申请号：JP25316693
申请日：1993-10-08
申请人： FUJITSU TEN LTD
发明人： MIWA SHOHEI
IPC分类号： F02P5/152 , F02D45/00 , F02P5/153
摘要： PURPOSE:To surely detect knocking by a simple constitution, in a knocking detecting device for an internal combustion engine. CONSTITUTION:A signal from a knocking sensor 2 is allowed to pass through a gate 5 only between decision intervals set by an engine speed sensor 3 and by a decision interval setting means 4. In this way, a noise overlapped with the knocking signal is removed. In a calculating means 8, from a peak value VPN and detection time PCN of each waveform crest of the knocking signal in the decision interval, a maximum value of knocking signal envelope is estimated, to output this estimated peak value VP to a maximum value memory means 15. In the maximum value memory means, the larger value VP of estimated and detected peak values is output to a knocking decision means 16. In the knocking decision means, this value is compared with a preset value, to decide knocking generated.

4. 发明专利

JPH0792057A OUTPUT CIRCUIT WITH OUTPUT MONITOR 失效
公开(公告)号：JPH0792057A
公开(公告)日：1995-04-07
申请号：JP23668093
申请日：1993-09-22
申请人： FUJITSU TEN LTD
发明人： MIWA SHOHEI
IPC分类号： G01M17/007
摘要： PURPOSE:To prevent the malfunction of a load even when an output circuit is abnormal at the initial check, and shorten the check time. CONSTITUTION:In the output circuit with output monitor having a control terminal C for controlling loads 2, 3 and a monitor terminal M for monitoring the state of the loads at check, a switch PS for power source switching is provided between a power source V and the loads, a dummy load D is connected to the monitor terminal, and the other end of the dummy load is connected to a power source V'. At the initial check, the power source switch is turned off to prevent the erroneous operation of the loads. A logical expression for check can be formed regardless of the operation of the loads, and the number of steps for check can be reduced.

5. 发明专利

JPH06281523A KNOCKING SIGNAL PROCESSOR USING FFT 失效
公开(公告)号：JPH06281523A
公开(公告)日：1994-10-07
申请号：JP7001493
申请日：1993-03-29
申请人： FUJITSU TEN LTD
发明人： MIWA SHOHEI
IPC分类号： G01L23/22
摘要： PURPOSE:To provide a knocking signal processor using FFT capable of using a comparatively low speed operation processor and reducing a storing capacity of a memory. CONSTITUTION:Vibration of an internal combustion detected with a knock sensor 11 is taken in a signal processor 13 after amplification is performed with a preamplifier 12. A pulse signal every specified rotation angle detected with a rotation angle sensor 14 is also taken in the signal processor 13. The signal processor 13 stores all vibration signals in a range of the specified rotation angle which is easy to produce a knock once and thereafter frequency analysis of one time is executed in the specified range centering the vibration signals which gives the maximum amplitude. Accordingly executed times of the frequency analysis and a storing capacity of a memory can be reduced.

6. 发明专利

JPH06280656A ESCAPE RUNNING DEVICE FOR VEHICLE 失效
公开(公告)号：JPH06280656A
公开(公告)日：1994-10-04
申请号：JP7361993
申请日：1993-03-31
申请人： FUJITSU TEN LTD
发明人： YAGI KIYOSHI , MIWA SHOHEI
IPC分类号： F02D41/22 , F02D11/10 , F02D43/00 , F02P5/15
摘要： PURPOSE:To safely run a vehicle for minimum siding of a vehicle by fully opening an air passage bypassing an electronic throttle valve when an abnormality in a computer or an actuator for driving the electronic throttle valve is detected. CONSTITUTION:Upon occurrence of an abnormality of an electronic throttle valve 12 in an electronically controlled internal combustion engine incorporating bypass passages 18, 19 bypassing the throttle valve 12 which is provided in an intake-air passage 2 and which is not mechanically coupled to an accelerator pedal 20, a vehicle can safely run. Accordingly, the siding running device incorporates throttle full closing means for controlling the throttle valve 12 so as to fully open the latter when an abnormality occurs if the control is carried out such that the opening degree of the accelerator is not associated with the opening degree of the throttle valve, and emergency intake-air supply means for controlling a flow control valve 16 provided in the bypass passage 18 so as to fully open the latter upon occurrence of the abnormality. Further, a desired output power of the engine is computed from an accelerator opening degree, and a fuel injection volume and an ignition timing for the engine are compensated in accordance with the desired output power.

7. 发明专利

JPH08163208A PORTABLE TELEPHONE SET 失效
公开(公告)号：JPH08163208A
公开(公告)日：1996-06-21
申请号：JP29917894
申请日：1994-12-02
申请人： FUJITSU TEN LTD
发明人： MIWA SHOHEI
IPC分类号： H04M1/00
摘要： PURPOSE: To adjust the volume level of a calling bell when a telephone call is coming in but a user can not immediately respond to it, and to transmit a message to the opposite side. CONSTITUTION: When a reception confirm switch 11a at a main body 100 of this telephone set or a reception confirm switch 21a at a remote controller 200 is turned on, the volume of calling bells 13 and 23 is set to a 'low' level and the message can be transmitted from a voice synthesizer 14 to the opposite side.

8. 发明专利

JPH08149888A CONSTANT CURRENT CONTROLLER 失效
公开(公告)号：JPH08149888A
公开(公告)日：1996-06-07
申请号：JP28649994
申请日：1994-11-21
申请人： FUJITSU TEN LTD
发明人： MIWA SHOHEI
IPC分类号： H02P8/12 , H02P8/38
摘要： PURPOSE: To make it possible to maintain accuracy for a constant current control by prohibiting current reading during switching of a semiconductor switching element. CONSTITUTION: Switching time is predicted based on a real current detected by a target current and current sensors 23a and b and, if a count value of a program counter is in a predetermined range before and after forecast time, then the reading of the real current affected by a rush current into a control section 24 is prevented by inhibiting the reading of the real current by A/D converter section 24f.

9. 发明专利

JPH0799798A DRIVING DEVICE FOR STEPPING MOTOR 失效
公开(公告)号：JPH0799798A
公开(公告)日：1995-04-11
申请号：JP24000093
申请日：1993-09-27
申请人： FUJITSU TEN LTD
发明人： MIWA SHOHEI
IPC分类号： H02P8/00 , H02P8/38
摘要： PURPOSE:To enable accurate detection of abnormality in the course of a low- speed operation and also suppression of occurrence of an erroneous diagnosis in the course of a high-speed operation. CONSTITUTION:The amount of depression of an acceleration pedal 11 is detected by an acceleration sensor 12 and taken in a control part 13. A stepping motor 14 is driven in conformity with an excitation pattern outputted from the control part, while the value travel of a throttle valve 17 is detected by a value travel sensor 18 and taken in the control part. A target step is set in accordance with the amount of depression of the acceleration pedal and a drive speed is determined in accordance with a deviation from the current step. Moreover, a threshold value for diagnosis of abnormality is determined in proportion to the drive speed. Accordingly, the accuracy of the diagnosis of abnormality can be kept high by setting the threshold value to be small during a low-speed operation of the stepping motor, and also suppression of an erroneous diagnosis is enabled by setting the threshold value to be large during a high-speed operation.

10. 发明专利

JPH0793688A SIGNAL SYSTEM ABNORMALITY DETECTOR 失效
公开(公告)号：JPH0793688A
公开(公告)日：1995-04-07
申请号：JP23660693
申请日：1993-09-22
申请人： FUJITSU TEN LTD
发明人： MIWA SHOHEI
IPC分类号： G08C25/00 , G01D3/028
摘要： PURPOSE:To detect abnormality generated in two signal series in early stages in the signal system in which one displacement quantity is read by dividing it into two systems. CONSTITUTION:An offset calculation means 5 which sets difference between two series data read in first when a power source is applied as an offset, and a series abnormality detecting means 7 which takes the difference between both the data for the two series data succeding to the two series data reading in an offset value first and detects the abnormality in the two series by a value obtd. by subtracting the offset from the difference are provided in the signal system which reads in one displacement quantity by the two series. The difference between the signals of the two series goes to only the one based on the abnormality in each signal series, which enables the abnormality of the signal series to be detected in early stages.

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