-
公开(公告)号：JPH02176163A
公开(公告)日：1990-07-09
申请号：JP27961289
申请日：1989-10-26
Applicant: MARELLI AUTRONICA
Inventor： ROBERUTO PAGAANO
Abstract: PURPOSE: To guarantee optimal preheating by providing a differentiating means generating signals indicative of the time differential of the intensity of current flowing in plugs and a comparator circuit means for shutting off the current flowing in the plugs by a switch means when the signal generated by the differentiating means indicates a predetermined threshold value. CONSTITUTION: A user operates a switch so that electric current flows to an excitation coil 6a of a relay 6, a switch 6b is open and resistance value of resistance elements of preheating plugs 2 is increased. Consequently, the current intensity consumed by them is reduced gradually. When a comparator 10 detects that the current flowing in the plugs 2 falls below a predetermined value on the basis of the signal fed to a sensor 7, the output signal of the comparator 10 is shifted to L and a lamp 5 is turned off. When a comparator 11 decides that the differentiation value of the current passing through the plugs 2 is below a predetermined value, the output of the comparator 11 turns to the L level and the relay 6 is in non-operation. The switch 6b is turned on to shut off the current to plugs 2.
-
公开(公告)号：JPH02176139A
公开(公告)日：1990-07-09
申请号：JP27961389
申请日：1989-10-26
Applicant: MARELLI AUTRONICA
Inventor： ROBERUTO PAGAANO
Abstract: PURPOSE: To reduce energy consumption by providing a storage inductor permanently connected to a first pole of a voltage supply and a conductive bypass path between the first pole and a load. CONSTITUTION: A switch SW1 interposed between a storage inductor Li and a first pole 1 of a power supply VB is controlled by an electronic control unit ECU. The switch SW1 initially turned on to direct electric current from the power supply to the storage inductor Li is turned to a non-excited state for quickly transmitting the current from the storage inductor to a load Li. A unit ECU causes switches SW3 and SWi to open and close in counterphase in order to maintain the current in the load Li at a predetermined average level. The control is effected both when the current in the load Li is maintained at a preset maximum value in a predetermined period of time and when the current is maintained at a lower 'maintained' current value. Thus, it is possible to reduce the number of electronic switches controlling the load Li.
-
公开(公告)号：JPH01321332A
公开(公告)日：1989-12-27
申请号：JP15106388
申请日：1988-06-17
Applicant: MARELLI AUTRONICA
Inventor： ROBERUTO DEIRUAKUA
Abstract: PURPOSE: To reduce the cost by making a recess in a support so that the support can be deformed elastically and providing a piezoelectric resistance sensitive element and a conductive means. CONSTITUTION: A hard supporting plate 1 made of a ceramic material is provided, in one surface 1a thereof, with a recess 2 having bottom wall face part 2a made of a thin film so that the support plate can be deformed resiliently under action of a force or pressure to be measured. The supporting plate 1 is provided, in the other surface 1b thereof, with four thick films or thin film resistors R functioning as a piezoelectric element by silk screen printing. These resistors R are interconnected to form a Wheatstone bridge circuit. Similarly, a conductive strip C is formed by silk screen printing onto the surface 1b of supporting plate 1 at each joint of resistors R. Furthermore, these resistors R are connected with a processing circuit 3. According to the constitution, manufacturing cost can be reduced.
-
公开(公告)号：JPH01177113A
公开(公告)日：1989-07-13
申请号：JP30764888
申请日：1988-12-05
Applicant: MARELLI AUTRONICA
Inventor： GIUZETSUPE CHIRIBERUTO
Abstract: PURPOSE: To effectively protect an integrated circuit from heat without damaging the operation function of the integrated circuit by building a thermal switch in the integrated circuit and reducing the electron current of an output transistor TR at the time when the temperature exceeds a threshold. CONSTITUTION: A control circuit 8 is connected to a resistance 5 and a threshold signal generation circuit 7, and the output of this control circuit 8 is connected to the base of a TR 3 or the control input of a circuit part 2 of an integrated circuit 1. When the current flowing in the collector-emitter circuit of the power TR 3 exceeds the threshold generated from a threshold signal generation circuit 7, the current supplied to the base of the TR 3 is reduced. Thus, the effective heat protection device for an integrated power circuit applicable to the automobile electronic device field is obtained.
-
-
Patent Agency Ranking
公开(公告)号：JPH07169582A
公开(公告)日：1995-07-04
申请号：JP23489594
申请日：1994-09-29
Applicant: MARELLI AUTRONICA
Inventor： ANDOREA NEPOTE , DARIO DEKURUTEI
IPC: H05B41/282 , H05B41/288 , H05B41/38 , H05B41/29
Abstract: PURPOSE: To reduce the dimension of the whole of a device so as to miniaturize a circuit by providing plural switching DC/DC converters, a bridge switching circuit and an electronic control unit. CONSTITUTION: A fly back DC/DC converter CC1 and a feed forward DC/DC converter CC2 are provided. Each converter CC1, CC2 has inputs 1, 2 respectively connected to a battery B for an automobile, which forms a direct current voltage source. Output of the converter CC2 is connected to an H-type bridge switching circuit HB, and the circuit HB has four MOSFET transistors M1-M4, which form a switch. An electronic control unit ECU drives each converter so that the converter CC1 is firstly operated by the generation of high voltage per each time of closing a switch of a gas discharge lamp L, and continuously, so that the converter CC2 is operated so as to generate the large power in spite of a low voltage.
-
公开(公告)号：JPH0775261A
公开(公告)日：1995-03-17
申请号：JP5873291
申请日：1991-03-22
Applicant: MARELLI AUTRONICA
Inventor： MARUCHIERO BOERA , ROBERUTO BERUCHIESHI
Abstract: PURPOSE: To make the supply circuit of a voltage regulator operate, regardless of a phase signal taken out of a generator winding at the time of the start of the generator by a method, wherein an enable signal is supplied to the supply circuit when the voltage of the terminal of a 1st comparing means exceeds a predetermined threshold. CONSTITUTION: When the engine of a car is started and a current generator 2 starts supplying a current, a drive circuit 13 extinguishes an indication lamp 11. By lowering a voltage applied to a resistor 13b below a reference value, the output level of a comparator 18 turned to Lo. However, when the indication lamp 11 is extinguished, a voltage between the terminal L of a voltage regulator 3 and a ground is elevated and reaches the voltage of a battery 1. Thus, even if the output level of the comparator 18 is turned to Lo, the output level of a comparator 17 reaches Hi, so that the enabled state of a supply circuit 15 can be maintained. With this constitution, the supply circuit 15 of the voltage regulator 3 can be made to operate, regardless of a phase signal taken out of one of the windings of a generator 4 at the time of the start of the generator 4.
-
公开(公告)号：JPH05242979A
公开(公告)日：1993-09-21
申请号：JP18356492
申请日：1992-07-10
Applicant: MARELLI AUTRONICA
Inventor： ANDOREA NEPOTE , JIYORUJIO AROTSUTO
IPC: B60Q1/04 , H05B41/16 , H05B41/288 , H05B41/392
Abstract: PURPOSE: To constitute the subject circuit without using a saturable transformer and a bipolar transistor. CONSTITUTION: This circuit is provided with two branch circuits a, b to be connected with a DC power source Vb and is provided with electronic switch means 3a, 3b to be connected in series with each primary winding 4a, 4b. The primary windings 4a, 4b of the branch circuits a, b include an inverter 1 which is inductively coupled with a secondary winding to be connected with a lamp L. The circuit is connected in series with an impedance 7 which is connected in series with the lamp L and changes impedance by a frequency and the lamp L. A control circuit 11 connected with resistance 9 for current detection which is connected in series with the lamp L alternately conducts the electronic switch means 3a, 3b. Thus, alternating voltage of a frequency depending on an external control signal is led to a secondary winding 5.
-
公开(公告)号：JPH05206758A
公开(公告)日：1993-08-13
申请号：JP20110592
申请日：1992-07-28
Applicant: SGS THOMSON MICROELECTRONICS , MARELLI AUTRONICA
Inventor： MIKERANJIERO MATSUTSUUKO , BANI PORETSUTO , MARUKO MORETSURI
IPC: G01N27/409 , H03F1/08 , H03F3/34 , H03F3/347 , H03F3/45
Abstract: PURPOSE: To provide an amplifier for measurement which can easily be integrated to the same chip as the amplifier by enabling the of frequency compensation with the small capacitance without using any external capacitance for compensation. CONSTITUTION: This amplifier A is provided with 1st and 2nd input transistors Q1 and Q2 connected to respective 1st and 2nd feedback amplifier circuits A1 and A2 coupled to respective capacitors C2 and C1 for frequency compensation. The 2nd feedback amplifier circuit A2 has a double stage configuration and is provided with one internal capacitor CX for compensation. These three capacitors for frequency compensation can have small numerical values and therefore, they can be easily integrated into the same chip as the amplifier A. This amplifier can be used especially as an interface between the oxygen sensor electronic controllers of zirconium dioxide having different ground conductors GND1 and GND0.
-
公开(公告)号：JPH04264393A
公开(公告)日：1992-09-21
申请号：JP27404791
申请日：1991-10-22
Applicant: MARELLI AUTRONICA
Inventor： ANDOREA NEPOTE , MARUCHIERO BOERA
IPC: H05B41/00 , H05B41/16 , H05B41/288 , H05B41/38 , H05B41/392
Abstract: PURPOSE: To reduce a lamp current smoothly after a warm-up of a lamp by a simple circuit constitution. CONSTITUTION: In an adjustment device for reducing high electric power to a specified operation level after the generation of a high electric power between a switching-on time and a lamp warm-up time, a lamp current is reduced in accordance with a reference current when a lamp voltage is about to increase using the reference current changing step-like.
-
-
-
-
-
-
-
-
-
Search Results
906
records
(took 0.02 seconds)
