Mitsubishi Electric Corporation

Yazaki Corporation

Mitsubishi Denki Kabushiki Kaisha

Osamu Nishizawa

Mitsunori Nishida

Kouichi Ohyama

Tetsushi Watanabe

Keishi Jinno

Wataru Tamura

Nobuaki Nuriya

Masao Motonobu

Shuuiti Matsumoto

Shozo Kanzaki

Manabu Yamashita

Yuki Iwagami

Akihiro Ishii

Kazumasa Harada

An electronic component unit of a wire harness includes a substrate on which an electronic component is mounted, a connector electrically connected to the substrate, and a connector fixing structure. The connector fixing structure includes a pair of notches that are provided facing each other on the substrate in a facing direction; a pair of press fitting plates that are provided on the connector and press-fitted into the respective notches; a positioning rib formed projecting from each of the press fitting plates toward the inside in the facing direction, having a width smaller than the width of the press fitting plates, and brought into contact with the substrate while the press fitting plates are press-fitted into the respective notches; and a deformation acceptable space provided adjacent to the outside of the press fitting plates that are press-fitted into the respective notches, in the facing direction.

Electronic component unit, wire harness, and connector fixing structure

A ventilator waterproofing structure applicable to an electronic component unit of a wire harness includes a projected columnar portion that is formed in a columnar shape and that is projected from a wall body of a casing in a first direction, a notch that is formed on the projected columnar portion in a straight line in a second direction, a step portion provided in the notch on a closed end side, and a closed space surrounded by an inner wall surface of the notch and a step surface of the step portion. A ventilation passage provided with a waterproof ventilation filter has an outside opening that is opened toward a closed space in a third direction in the notch.

Electronic component unit, wire harness, and ventilator waterproofing structure

An electronic component unit of a wire harness includes a substrate on which an electronic component is mounted, a connector electrically connected to the substrate, and a connector fixing structure. The connector fixing structure includes a pair of notches that are provided facing each other on ends of the substrate in a long-side direction and that penetrate through the substrate in a plate thickness direction, a pair of press fitting plates that are provided on the connector and that are press-fitted into the respective notches, and a deformation acceptable space that is provided adjacent to each of both sides of the press fitting plates press-fitted into the respective notches in the long-side direction.

A circuit board is sealed and housed in a casing including a base and a cover, a connector housing including a partition wall is mounted on the circuit board, and an electrical connection between the interior and the exterior of the casing is established. A water-repellent filter is fixed to an inner surface of the partition wall, an outer surface portion of the water-repellent filter is opened to atmosphere via the breath ventilation hole, and an atmospheric opening surface thereof is formed such that the atmospheric opening surface being wetted directly with water is avoided by a poured water blocking wall and water barrier walls. A position where the poured water blocking wall is provided is changed by an insert mold in response to the direction of the mounting surface of the base.

Waterproof type control apparatus

A boost switching device () for generating a boosted high voltage (Vh) includes a slew rate selection circuit (), decreases a selection value (k) to suppress noises when the temperature of the boost switching device () is low, and increases the selection value (k) to suppress a temperature increase when the temperature thereof is high. An internal average temperature of an in-vehicle engine control apparatus () is detected by an environmental temperature detection device (), reference data () provided in a calculation control circuit unit () is used to calculate a relationship between a permissible engine rotational speed (Nk) at which the split injection can be continued at a current measured environmental temperature (Tx) and the selection value (k), and an appropriate selection value (k) corresponding to a current engine rotational speed (Ne) is determined.

In-vehicle engine control apparatus

An in-vehicle engine control apparatus allowing split injection frequency or split injection of fuel while preventing a driving switch element for fuel injecting electromagnetic coils and a boosting switch element for generating a boosted high voltage from being overheated. An operation control circuit portion has reference data of measured environmental temperature vs allowable engine rotational speed with a selected value of the split injection frequency being a parameter, and determines the selected value having, as an upper limit, a split injection frequency which makes the internal temperature of the boosting switch element or a rapidly exciting switch element a predetermined allowable limit value in association with the present environmental temperature detected by an average environmental temperature detection element in a case and the present engine rotational speed detected by an engine rotation sensor.

A case configured with a base and a cover watertightly contains a circuit board, and a connector housing having a diaphragm is mounted in the circuit board so that the inside and the outside of the case are electrically connected with each other; an outer ring-shaped circumferential wall is provided on the outer surface of the diaphragm, and a protrusion portion having first and second ventilation holes is provided at the side surface of the outer ring-shaped circumferential wall; one end of each of the first and second ventilation holes communicates with the outer surface portion of a water-repellent filter provided on the inner wall surface of the diaphragm, and the other end thereof communicates with the inside of a recess portion that is situated at a side of a mating connector and fits with the protrusion portion.

Waterproof control apparatus

A first external tool (A) serially connected to an electronic controller (A) through a pair of communication lines (LANH, LANN) applies a high voltage (Vaa) higher than a normal control voltage (Vcc) to the communication line (LANH) when a program is written. The electronic controller (A) recognizes connection of the first external tool (A) by a comparison circuit (A) for monitoring a received voltage and a write-mode determination circuit (A), initializes a microprocessor (), and receives and stores an total control program (TCPRG) in a program memory (A) based on a content of a boot program memory (). During an operation of the electronic controller (A), the external tool (A) is removed and the high voltage (Vaa) is not applied to the communication line (LANH). Therefore, the electronic control apparatus is not erroneously placed in the write mode.

Electronic controller to be connected to program tool

An object is to prevent a water-repellent filter, which performs ventilation between the interior and the exterior of a sealed casing and prevents entry of water, from being wetted directly with water. A circuit board is sealed and housed in a casing including a base and a cover, a connector housing including a partition wall is mounted on the circuit board, and an electrical connection between the interior and the exterior of the casing is established. A water-repellent filter is fixed to an inner surface of the partition wall, and an outer surface portion of the water-repellent filter is opened to atmosphere via first and second ventilation holes and first and second connection ventilation holes. Therefore, the water-repellent filter can be avoided from being wetted directly with water.

A waterproof control unit is provided in which: connector housing is fixedly positioned onto circuit board that is mounted onto base; a first seal gap Gformed of the connector housing and a cover, a second seal gap Gformed of the connector housing and the base and a third seal gap Gformed of the base and the cover are included; the first seal gap Gis formed of a terrace slope portion gap Gand an outer step flat portion gap Gand an inner step flat portion gap Gthat are in communication with the terrace slope portion gap G; a gap setting protrusion for limiting the gap width is provided at least in the first seal gap G; and, between the connector housing and the cover, a horizontal movement limitation member are provided for limiting the relative positional relationship between the connector housing and the cover.

Waterproof control unit

In an inductive element which is intermittently excited by a boosting opening and closing element and charges a high-voltage capacitor to a high voltage, an inductive element current proportional to a voltage across both ends of a current detection resistor and a boosted detection voltage which is a divided voltage of the high-voltage capacitor are input to a boosting control circuit portion via a high-speed A/D converter provided in an arithmetic and control circuit unit. The boosting control circuit portion adjusts the inductive element current so as to be suitable for the time from the present rapid excitation to the next rapid excitation, and controls opening and closing of the boosting opening and closing element so as to obtain a targeted boosted high voltage which is variably set by a microprocessor of an arithmetic and control circuit unit.

In-vehicle engine control device and control method thereof

In a waterproof control unit (A) in which a part of a connector housing (A) mounted on a circuit board (A) is exposed and the circuit board (A) is hermetically housed in a casing including a base (A) and a cover (A), in a gap between the cover and the connector housing, a waterproof sealing material () is applied to a first sealing gap defined by outer-step flat portions (), slope portions (), and inner-step flat portions (), and in a gap between the base (A) and the connector housing (A) or between the base (A) and the cover (A), a waterproof sealing material () is applied to a second or third sealing gap defined by convexoconcave sealing surfaces having a convex thread loosely fitted into a concave thread.

Waterproof control unit and method of assembling the same

A calculation control circuit unitA is provided with a microprocessor, an auxiliary control circuit unitA, and a high-speed A/D converterto which the detection signals of excitation currents for electromagnetic coilsthroughare inputted; based on an valve-opening command signal generated by the microprocessorand excitation-current setting information, the auxiliary control circuit unitA opening/closing-controls power supply control opening/closing devices by use of a numeral value comparator and a dedicated circuit unit, and monitors and stores at least one of the peak value of a rapid excitation current and a peak current reaching time; the microprocessorperforms correction control with reference to the monitoring storage data, and implements fuel injection control while reducing a rapid control load on the microprocessor

Vehicle engine control system

An electrical load is supplied with power from a driving power source, and a microprocessor (CPU) controls the opening/closing current supply rate (duty factor) of an opening/closing element in accordance with target current and driving power source voltage so that open loop control is carried out to achieve predetermined target current. The voltage between both the ends of a current detecting resistor connected to the ground side of the opening/closing element is input as a monitoring voltage from a current detecting amplifying circuit portion through a multichannel AD converter to CPU. When the error between the comparison target voltage corresponding to the target current and the monitoring voltage is above a first permissible error, CPU judges that there is an abnormality sign, and if the error is above a larger second permissible error, CPU judges that there is appearing abnormality. Accordingly, an abnormality sign of a semi-wire-breaking/semi-short-circuit state of the electrical load can be sensed, and abnormality notification can be carried out.

Non-feedback type load current controller

A power supply control device for on-vehicle electric loads is proposed, the control device being capable of detecting breakages at a plurality of electrical loads, a positive side wiring thereof, a negative side wiring thereof, and a commutation circuit. Energization of electrical loads from driving power supply is controlled using switching elements. Anode terminals of commutation diodes connected in parallel with the electrical loads are connected to a load ground by an external common negative line or external individual negative lines. A breakage abnormality at the external common negative line or external individual negative lines is detected by negative line breakage abnormality detection circuit. Load currents at the electrical loads are detected by current detection resistors and current detecting differential amplifier circuits, and it is determined that there is an individual abnormality when a detected current is greatly different from a target current.

Growing community of inventors

Tokyo, Japan

Osamu Nishizawa