Abstract: Object of the present invention is to provide an induction alternating current generator on vehicle and a method for generating alternating current in a generator on vehicle, which improve the efficiency of the generator by increasing magnetic flux permeating a stator core.Second electromagnetic exciting means for generating magnetic field in the direction of repelling the leak magnetic flux between neighboring claw poles, are provided in the spaces formed by the neighboring claw poles engaging each other at a gap and first electromagnetic exciting means provided inside a pair of the rotor cores of the induction alternating current generator on vehicle.

Abstract: A knock control system which includes a knock control unit constructed of a transducer portion for detecting vibrations of an engine and converting the detected vibrations into an electric signal, and a knock signal processing unit for delivering a signal indicative of the occurrence of a knock in dependence upon a receipt of the knock signal from the transducer portion. The knock signal processing circuit controls the ignition timing of the internal combustion engine on the basis of the knock signal from the knock control unit. At least one of the transducer portion and the knock signal processing circuit unit of the knock control system is mounted on a portion of a distributor which has a fixing base portion at a part of the housing thereof.

Abstract: An electronic device for an automobile is roughly divided into individual parts and control circuit elements which are mounted in a casing divided into two compartments, according to the present invention. The individual parts are arranged in one compartment and are covered with silicone rubber to improve their water resistance. The control circuit elements are arranged in the other compartment and are covered with a silicone gel to prevent any stresses acting upon the control circuit elements, such as ICs, and provide these elements with moisture resistance. The control circuit elements are bonded by high-temperature solder to improve their heat resistance, but the individual parts are bonded by eutectic solder.

Abstract: A pressure transducer for automobiles comprises a closed housing, a member for detecting the pressure in the suction pipe of an engine and converting the pressure detected into electric signals, an amplification circuit disposed in the closed housing, and an air passage. The air passage communicates with the atmosphere, but prevents water from penetrating therethrough into the closed housing. The air passage comprises an air hole formed in a member defining the closed housing about terminals provided for leading the electric signals out of the closed housing.

Abstract: A semiconductor absolute pressure transducer assembly has a silicon diaphragm assembly and a covering member. The silicon diaphragm assembly has a circular pressure sensitive diaphragm, on the surface of which are diffused piezoresistors and conducting paths. The covering member composed of borosilicate glass has a circular well formed therein. On the surface of the silicon diaphragm assembly on which the piezoresistors and the conducting paths are diffused, a passivating layer of silicon dioxide is deposited. Further on the passivating layer, a conductive layer is formed by, for example, evaporating silicon. And the glass covering member is bonded on the silicon diaphragm assembly by anodic bonding. Namely, the silicon diaphragm assembly and the glass covering member are heated up to a certain high temperature and a relative high voltage applied across the conductive layer of the silicon diaphragm assembly and the glass covering members.

Abstract: A semiconductor pressure transducer assembly comprising a silicon diaphragm assembly and a glass covering member. The silicon diaphragm assembly has a circular diaphragm portion of thin silicon which is formed using etching, and a thick supporting portion therearound. Piezoresistive elements of a piezoresistive bridge circuit and conducting paths for electrically connection thereof are formed on the silicon diaphragm assembly. On a surface of the silicon diaphragm assembly, a passivating layer of silicon dioxide are formed in uniform thickness, and further on a surface of the passivating layer is formed a layer of polysilicon on the supporting portion of the silicon diaphragm assembly. In the passivating layer, a contacting window is formed, through which the polysilicon layer is electrically connected to the silicon diaphragm assembly.

Abstract: This invention relates to an ignition device of the type wherein a pickup coil for making a signal synchronous with the engine revolution is disposed within a distributor, an amplifier circuit for amplifying the output of the pickup coil and a power transistor for controlling the primary coil current of an ignition coil are arranged in a circuit unit under hybrid IC and chip states respectively, and the circuit unit is mounted on a side surface of a housing of the distributor.A highly waterproof structure has been found necessary in order that the insulation between the housing and pickup terminals as well as connectors for coupling the pickup coil and the amplifier circuit and the insulation between the terminals may be prevented from degrading due to moisture.To this end, a protuberance which projects from the circuit unit into the housing is disposed in a manner to surround the pickup terminals.

Abstract: A liquid level detecting apparatus comprises a thermistor adapted to generate heat by current flowing therethrough, wherein the liquid level is sensed by detecting a current value at the thermistor which varies in dependence on a variation in temperature of the thermistor, which temperature in turn varies in dependence on whether the thermistor is immersed in the liquid or exposed to air. A relay coil is provided in series to the thermistor and disposed within a casing together with the latter so that the variation in temperature of the liquid may be transmitted to the relay coil, wherein the variation in the current value at the thermistor caused by the temperature variation of liquid is corrected by the variation of the resistance of the relay coil.