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公开(公告)号：JPH04255432A
公开(公告)日：1992-09-10
申请号：JP27255891
申请日：1991-10-21
Applicant: MARELLI AUTRONICA
Inventor： MARUCHIERO BOERA , BARERIO JIYORUJIETSUTA , PAORA REDEIBO
Abstract: PURPOSE: To avoid sudden changes in the resistance torque of an internal combustion engine, when an exciting current applied to the armature winding of a generator is changed by the change of an electrical load, etc., in the recharging system of a vehicle battery. CONSTITUTION: The collector and emitter of a drive transistor (17) are connected in series to a field winding (5), and both the terminals of a battery (1) which is the supply source of a DC voltage (VBA). A sensor means (19) which detects a current applied to a field winding (4) is provided. Control circuits (10-16), which control on/off of the drive transistor (17) according to a value which is determined by comparing a voltage (VA) supplied by a generator (2) with a comparison voltage, depending on a current detected by the sensor means (19), are provided.
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公开(公告)号：JPH03180918A
公开(公告)日：1991-08-06
申请号：JP30230590
申请日：1990-11-06
Applicant: MARELLI AUTRONICA
Inventor： BUARERIO JIYORUJIETSUTA , IBESU REGURANDO , FURANKO SARERUNO , JIYANRUIJII MORETSURO
IPC: G06F3/00 , H03K17/082
Abstract: PURPOSE: To prevent the damage of a transistor TR by permanently disabling the TR concerned with a control part, which detects short-circuit, in the case of repeated occurrence of short-circuit in a load. CONSTITUTION: When a short-circuit state occurs between the drain of a TR Mi and the positive pole of a power source VBD, a diagnostic logic circuit 13 detects this state and applies a disable signal to a control circuit 12 for a temporary stop period. If a short-circuit state between the drain of the TR Mi and the positive pole of the power source VBD is detected again after this period, a first breakdown signal is outputted, and the disable signal is permanently applied to the control circuit 12. A driver circuit 12 is stopped finally in this manner, and then, the signal of a terminal CMD1 is returned to level '0' and is kept in this level. Thus, stress of the TR M1 is eliminated to prevent the damage of the TR M1.
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公开(公告)号：JPH03152471A
公开(公告)日：1991-06-28
申请号：JP26618290
申请日：1990-10-02
Applicant: MARELLI AUTRONICA
Inventor： FURANKO MAROBERUTEI , JINO PORITO , FURANKO SARERUNO
IPC: G01P15/125 , F02B1/04 , G01P15/09
Abstract: PURPOSE: To make it possible to utilize the characteristics of the arrival signal from a sensor to the maximum limit by filtering the output signal of an amplitude limiter having two CMOS transistors connected to the output of the sensor and changing the level. CONSTITUTION: The signal supplied by a capacitive sensor S or particularly piezoelectric acceleration sensor is processed by a circuit 2 via an interface circuit IC integrated at a single substrate by CMOS technology. At this time, the circuit IC entirely connected to a power source VDD of DC current and ground limits the input signal by an amplitude limiter 3 having two CMOS transistors to protect it against overvoltage. A circuit 4 has an inverting amplifier A connected to a DC power source VR lower than the power source VDD, capacitive impedance circuits Z1 , Z2 converts the signal into DC signal, limits the band width of the signal from the sensor S and attenuates the ultra-low frequency component unnecessary for the signal.
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44.发明专利
公开(公告)号：JPH03149336A
公开(公告)日：1991-06-25
申请号：JP26618190
申请日：1990-10-02
Applicant: MARELLI AUTRONICA
Inventor： JINO PORITO , FURANKO MAROBERUTEI , FURANKO SARERUNO
Abstract: PURPOSE: To detect pinking by providing comparison and process means with weighted and averaged signals of samples of at least third detection signals which are the last and the second last to be received. CONSTITUTION: Two channels A, B are provided for detecting and processing signals provided by an accelerometric sensor S operating in two frequency bands in which peaks indicative of the occurrence of pinking exist. In each combustion phase, a third channel, also connected to the sensor S, provides a signal representative of the noise component of the signal from the sensor S, in a frequency band in which the peaks do not occur. The signals provided by the channels A, B are integrated and then compared with a reference signal generated in dependence on the noise component of a cylinder detected by the cylinder. Thus, the cylinder producing the pinking is detected.
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公开(公告)号：JPH03147293A
公开(公告)日：1991-06-24
申请号：JP28170690
申请日：1990-10-18
Applicant: MARELLI AUTRONICA
Inventor： ANDOREA NEPOTE
IPC: B60Q1/04 , H05B41/16 , H05B41/24 , H05B41/392
Abstract: PURPOSE: To supply predetermined power, independently of ambient temperature fluctuation by monitoring the power to be supplied to a lamp, and providing a feedback circuit and an inverter so as to supply a constant power to the lamp. CONSTITUTION: A supplying device 1 is connected to a feedback circuit 5 having two input units 5a, 5b. The input unit 5a is connected to an output unit of an ignition device 3, so as to monitor the voltage to be supplied to a lamp L during lighting. The input unit 5b, to which a resistor between the lamp L and the ground is connected, monitors the current I flowing into the lamp L. A regulator 4 changes the current characteristic to be supplied to the lamp L, namely, the frequency and the current utilization factor, and sends the signal so that the predetermined power is supplied to the lamp L. With this structure, accurate power can be supplied to the lamp L.
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Patent Agency Ranking
公开(公告)号：JPH02185850A
公开(公告)日：1990-07-20
申请号：JP31224589
申请日：1989-11-30
Applicant: MARELLI AUTRONICA
Inventor： JIYUZETSUPE KOTEINORI , SUTEFUANO RATANJIO
IPC: B60T8/72 , B60T8/1761 , B60T8/50
Abstract: PURPOSE: To constantly generate the optimum brake pressure by slowly increasing brake pressure after quickly conducting pressure increase for computed amount based on total pressure increase in the last period and a control pressure reducing period after that in a brake increasing stage. CONSTITUTION: A solenoid valve 4 is provided between pipes 1, 3 to supply brake fluid pressure of a master cylinder 2 to a brake member, and this is controlled by a gas-liquid actuator 5. The actuator 5 includes a barometer capsule 6, and this capsule 6 is made to communicate with an intake manifold 9 of an internal combustion engine through a second solenoid valve 7. The valves 4, 7 are controlled to slowly increase brake pressure after quickly increasing brake pressure at amount computed based on total amount of pressure increase in a preceding cycle in the last period and the second period from the last in a pressure-reduced stage.
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公开(公告)号：JPS6474064A
公开(公告)日：1989-03-20
申请号：JP21350988
申请日：1988-08-24
Applicant: MARELLI AUTRONICA
Inventor： MARUKO KARUFUSU
Abstract: PURPOSE: To transfer energy quickly by providing a storage coil and a capacitor connected with an electronic switch means, and forming a resonance circuit by connecting the storage coil with a power supply and then connecting the coil with the capacitor. CONSTITUTION: The guide circuit for a plurality of inductive loads Li has an input terminal 1 to be connected with a battery wherein the load Li comprises a solenoid for operating the electric injector of a diesel engine for automobile. A storage coil L1 is connected with the input terminal 1 through a control electronic switch SW1 which is in pause time. Similarly, other control switch SW2 is connected between the storage coil L1 and the ground. Furthermore, a plurality of branch circuits are connected in parallel with a capacitor C. An electronic controller ECU comprises a microprocessor and an I/O interface circuit and controls respective switches SW1 , SW2 and SW3 . The storage coil L1 is connected with the capacitor C to form a resonance circuit for discharging the load Li .
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公开(公告)号：JPS6474063A
公开(公告)日：1989-03-20
申请号：JP21350888
申请日：1988-08-24
Applicant: MARELLI AUTRONICA
Inventor： MARUKO KARUFUSU
Abstract: PURPOSE: To reach a leak level quickly by providing means for controlling conduction of current from a power supply to a load by connecting a by-pass branch circuit between a first control switch and a load thereby closing first and second control switches simultaneously. CONSTITUTION: A control circuit for a plurality of inductive loads Li includes a storage inductor L1 connected with an input terminal 1 through an electronic control switch SW1 . The switch SW1 is shown as an interruption switch and provided in parallel with a circulation diode. A control switch SW2 similar to the switch SW1 is also connected between the storage inductor L1 and the ground. A diode R2 is connected with the storage inductor L1 which is also connected with a capacitor C. An electronic controller ECU comprises a microprocessor and an I/O interface circuit and controls respective switches SW1 ,.... A by-pass branch circuit M is connected between the switch SW1 and the branch circuit of the load L1 and a current conduction controller B is connected therewith.
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公开(公告)号：JPS6471317A
公开(公告)日：1989-03-16
申请号：JP21351088
申请日：1988-08-24
Applicant: MARELLI AUTRONICA
Inventor： MARUKO KARUFUSU
Abstract: PURPOSE: To switch an output at high speed when a signal impressed to a non-inverting input exceeds a threshold value by connecting an inverter to a feedback circuit between the output and inverting input of an operational amplifier (OA). CONSTITUTION: A voltage signal V1 of a power source S is inputted through a resistor 1 to the non-inverting input terminal of the OA, and a threshold voltage VR is inputted to the inverting input terminal. The output of the OA is applied from a terminal 5 connected to an inverter circuit 1 connected to the feedback circuit and a terminal 6 connected to the OA. When the signal V1 exceeds the threshold voltage VR, the output of the OA is switched at high speed.
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公开(公告)号：JPS63302303A
公开(公告)日：1988-12-09
申请号：JP4404888
申请日：1988-02-26
Applicant: SGS THOMSON MICROELECTRONICS , MARELLI AUTRONICA
Inventor： JIYANNPIEERU RIYUZANCHI , JIYANNMISHIERU MOROO
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