公开(公告)号：JPH02179296A

公开(公告)日：1990-07-12

申请号：JP27697989

申请日：1989-10-24

Applicant: MARELLI AUTRONICA

Inventor： MARUKO KARUFUSU ,  RUCHIAANO PAUTATSUSO

IPC: F02D41/20 ,  F02D11/10 ,  H02P7/29 ,  H02P8/22

Abstract: PURPOSE: To surely control a throttle valve at a predetermined static position at the time of idling by using a square wave signal having variable duty cycle as a signal for driving a DC motor, and forward or reversely rotating the motor according to change of the cycle. CONSTITUTION: A static position of a throttle valve B with respect to an idling speed is controlled by a DC motor M, which is driven by a controller C. A square wave signal S, output from an electronic control unit ECU, is supplied to an input unit (i) of the controller C. The cycle of the signal S is variable, and a code indicating amplitude and direction of change from its 50% designates the amplitude and direction of desired rotating speed of the motor M. The unit ECU receives a signal from a position sensor P, coupled to the valve B. A driver E flows a current in one direction or reverse direction with respect to the motor M, when the signal to be supplied is a high or low level.

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

IPC: F02B1/04 ,  F02B3/06 ,  F02D41/20 ,  H02M3/155 ,  H03K17/04 ,  H03K17/64

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 .

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

IPC: F02B3/06 ,  F02D41/20 ,  H03K17/64

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.

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

IPC: H03K5/08 ,  H03K5/24

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.