Abstract: A small-sized apparatus having an inverter which can satisfy EMC standards by providing a small zero phase-sequence reactor which has a high noise attenuation rate over a wide frequency range and wide working temperature range. The apparatus having an inverter comprising a line-noise filter connected between a power supply and the inverter and a zero phase-sequence reactor connected between the inverter and a load is characterized in that the zero phase-sequence reactor connected between the inverter and the load comprises a tape-wound magnetic core formed by winding a nanocrystalline soft-magnetic alloy tape in which nanocrystalline grains not larger than 50 nm in grain size account for at least 50% in volume of the structure; the tape-wound core having the AC relative initial permeability .mu.ri (10 kHz) at the magnetizing force peak value of 0.05 A/m and the frequency of 10 kHz of 20,000 to 200,000, and the AC relative initial permeability .mu.ri (100 kHz) at the magnetizing force peak value of 0.

Abstract: A remote keyless entry apparatus is disclosed for use with a vehicle. The apparatus includes a receiving unit disposed within the vehicle and a key fob transmitter for transmitting a plurality of signals to the receiving unit. The transmitter includes a transmitting unit for transmitting the plurality of signals to the receiving unit, a control unit operatively connected to the transmitting unit for controlling transmission of the plurality of signals and a diagnostic gathering and storage unit electrically connected to the control unit for supplying diagnostic data to the control unit. Additionally, the transmitter includes a key fob unit selectively connected to the control unit and to the diagnostic unit. The arrangement is such that in a first operative disposition of the key fob unit, the key fob triggers the control unit so that a first signal of the plurality of signals is generated by the transmitter unit for reception by the receiving unit.

Abstract: An electronic ignition and alarm system for motorcycles. An electronic circuit for reading a coded signal emitted by a code-generating integrated circuit inside the ignition key, can be connected inductively or by electric contact means to a microcontroller programmed to enabling the operation of the ignition circuit of the engine after identification of the coded-signal. The coded-signal reader and the microcontroller are fed by a power source comprising a capacitor for storing the energy supplied by the voltage generator of the ignition circuit of the motorcycle.

Abstract: The automated cycle storage system comprises:a plurality of cycles (CY), each having a fastening region (ZA) for temporarily storing it, an identification means (P1, P2) containing an identifier associated in a one-to-one way with said cycle and an antitheft device (AV) firmly attached to the cycle and designed so as to prevent the cycle from being stolen during temporary use of the cycle by a user, this antitheft device being actuable by means of a removable key (CL) containing at least part of the identification means (P1), and at least one storage station (ST) comprising a number of storage locations (EMP) each capable of removably housing a cycle, a number of controllable automatic cycle-locking/unlocking devices (CRH), each capable of engaging in said fastening region of a cycle, and read devices (LP1, LP2) capable of reading the identification means of the cycles housed in the storage locations.

Abstract: An anti-theft system for a motor vehicle includes a transceiver disposed in a motor vehicle and a portable transponder. If a magnetic alternating field of the transceiver is turned on, energy signals are transmitted inductively to the transponder, where they charge an energy storing device. As soon as the alternating field is turned off, a transponder oscillating circuit oscillates at its resonant frequency. This oscillation is transmitted inductively back to the transceiver. In the process, the resonant frequency is measured. Then, the exciter frequency of the alternating field is adapted to the resonant frequency of the transponder, so that the inductive energy transmission is as effective as possible in subsequent charging operations.

Abstract: A security system for a vehicle includes a keyboard for receiving input codes that comprise user input codes and a start code. A processor is operably coupled to the keyboard for receiving signals indicative of each input user code and the start code, wherein the processor provides an output signal if an input user code corresponds to an user code and is followed by the start code. The processor also provides the output signal if the start code has been entered during an adjustable time period after the vehicle has been turned off. A controlled device is operably connected to the processor and controls a component of the vehicle to allow the vehicle to start when the output signal from the processor is received.

Abstract: A method of preventing movement of a locomotive while personnel are working on the locomotive. The method includes placing the brakes of the locomotive under the control of a card reading control box, and providing personnel employed to work on the locomotive with identification cards readable by the box. Each worker inserts his or her card in the box before working on the locomotive, and the control box reads the cards and in response thereto maintains the brakes of the locomotive at full service until personnel have left the locomotive and the control box is cleared by workers again inserting their cards in the box or by a master key in the position of an engineer/operator of a locomotive.

Abstract: An anti-theft system for a motor vehicle includes a portable code transmitter which transmits a code signal from a distance upon actuation. A receiver unit in the motor vehicle receives the code signal and evaluates it. Upon authorization, only the engine is started, but the vehicle does not have to be unlocked. A further code signal is required in order to drive the vehicle. However, it must be generated in the vehicle interior. Thus the engine can already warm up without the user being located in the vicinity of the vehicle.

Abstract: Apparatus and method to separate the harmonic problems in the load side circuit of an electrical power distribution system from the source side circuit of a source transformer in a reliable and economical manner. The electrical power distribution system includes at least a source of AC electrical power, a load, and the connection from the source to the load including a source transformer, electrical conductors, wires, or cables. A part of the load is the non-linear load which injects harmonics. A harmonic blocking filter, comprised of an existing source transformer and a series combination of an auxiliary transformer and a capacitor, is connected in parallel with the source transformer. The MVA rating of the auxiliary transformer is chosen to be equal or smaller than the MVA rating of the source transformer, and the leakage impedance of the auxiliary transformer is chosen to be equal or larger than the impedance of the source transformer.

Abstract: Apparatus for disabling operation of a vehicle in the event of an attempted theft thereof. A switch is provided in the ignition circuit. The switch is controlled by a processor which is remotely-controllable to open the ignition circuit to prevent the passage of current therethrough. This switch is thus controllable independently of whether the vehicle is in operation whereby the vehicle may be rendered inoperative even after it is discovered that the vehicle has been driven away by a thief.

Abstract: A process for controlling the use of a motor vehicle is provided using a code signal having two parts which is contained in a code memory carried by the user. A code comparator is contained in the motor vehicle into which the code signal is fed and which, if this code signal corresponds to a reference code signal, releases the use of the motor vehicle. The code memory has an access control device which can be controlled by the code comparator and which in each case releases only a partial code signal for a reading operation. This release takes place only if the first read partial code signal corresponds to the corresponding reference partial code signal.

Abstract: An electrical control system for an automotive vehicle can be switched to a service facility operating mode in which locks for the glove compartment, a storage console and the trunk can be inactivated in their closed position while other electrically-operated vehicle locks remain operable by actuators of the control system to prevent access to personal belongings by service personnel. Restoration to the normal operating mode can be effected automatically upon lapse of a time period programmed into the central unit.

Abstract: The invention provides an ignition key-vehicle communication device having at least one electronic key which can be inserted into a vehicle-end ignition lock. A wireless key-vehicle communication component arranged on the key actuates at least one vehicle-end functional unit by activating an activation element which is arranged at the key end. To protect against incorrect operation, means are provided for detecting when a key is inserted into the ignition lock and/or is inserted in a specific position in the ignition lock, and disabling communication between this key and the functional unit to be actuated in response thereto. The means for protecting against incorrect operation are arranged on the key.

Abstract: A remote vehicle disabling and distress indicator system for a motor vehicle that is activated by an external telephone call or internally by one of two switches. The telephone call sends a signal received by a modular telephone stored in the vehicle that disables the vehicle by deactivating the ignition coil or substantially closing a fuel valve that controls fuel flow between the vehicle fuel tank and the vehicle engine. The signal also causes a distress sign at the top of the vehicle to be illuminated. In addition, the signal activates a tape machine that plays a prerecorded distress tape message through speakers that send a loud audible reproduction of the taped message internally and externally to the motor vehicle to attract the attention of any local population. The taped message may be any of a variety of messages, such as "HELP|", "CALL THE POLICE|", etc.

Abstract: An anti-theft system for a motor vehicle includes a portable transponder carrying an item of code information. A stationary antenna has a resonant circuit with components and a resonant frequency being determined by the components. An oscillator oscillates at an oscillator frequency and has an output variable being used as an exciter variable with an exciter frequency for compelling an oscillation of the resonant circuit. The oscillation is amplitude-modulated as a function of the code information of the transponder. An evaluation unit receives the oscillation of the resonant circuit. The evaluation unit detects the modulated oscillation and demodulates the code information out of the oscillation. A comparator compares the code information with command code information and supplies an enable signal if a match occurs. A security unit receives the enable signal.

Abstract: In order to avoid filter excitations of subharmonics or intermediate harmonics, that is to say of oscillations in the frequency range between integral harmonics of the mains frequency (f.sub.N), in the case of an attenuation resistor (R1, R3, R3') in parallel with a series resonant circuit comprising a filter inductor (L1, L3) in series with a filter capacitor (C1, C31, C31'), the resistance is dimensioned in such a way that a current gain of the filter (F1-F3) at its frequency pole points with an AC mains (1) is not greater than 6-fold. Double low-pass filters (F1, F2) and high-pass filters (F3) with attenuation resistors (R1, R3, R3') are particularly suitable as filters (F1, F3).

Abstract: A device for transmitting data or energy supply from or to a transponder, especially for an anti-theft system in a motor vehicle, includes an antenna oscillating circuit which is induced to oscillate by an exciter variable. The oscillation is transmitted by transformer coupling to a transponder oscillating circuit. In order to make the transmission of energy or data as effective as possible, the current or the voltage in the antenna oscillating circuit is measured and compared with a desired variable. Upon a deviation, a correction value is generated by which the exciter current is increased or the resonant frequency is adapted to the exciter frequency as a consequence of the addition of an impedance to the antenna oscillating circuit.

Abstract: A vehicle theft-prevention device which includes an ignition key having a transponder, a coil unit for supplying power to the transponder when the ignition key is inserted into the coil unit and then turned to a starting position thereby permitting the transponder to generate an identification code. The coil unit outputs the identification code to a disabling controller and the disabling controller outputs an engine drive signal when the identification code from the coil unit is valid and outputs an engine stop signal when the identification code is invalid. The vehicle theft prevention device also includes an engine controller for permitting an engine starting operation to continue when the engine drive signal is input into the engine controller from the disabling controller within a predetermined communication time period from a moment the engine starting operation is initiated by turning the ignition key to the start position.

Abstract: An identification or protection system for vehicles, doors, lights and other electronic objects possessing a disabled state, having a disabling circuit operatively associated with the identification system so that when said resulting circuit is activated, the object achieves its disabled state; a transmitter transmitting a signal for a period of time at least once during a succession of time intervals using frequency-based coding; a receiver configured to receive the signal transmitted by the transmitter, the receiver causing the disabling circuit to disable the object when the receiver does not receive a number of consecutive signals from said transmitter which exceeds a pre-determined threshold.

Abstract: A circuit to discriminate the source of harmonic distortion of the output voltage comprises voltage sensors coupled to the output terminals of a source of electric power and to a point of regulation remote from the source for sensing the output voltage waveform present at each of these locations. The circuit then utilizes these two sensed waveforms to discriminate the source of any harmonic distortion between the source of electric power and the utlization equipment. This circuit calculates the percentage total harmonic content of each of the sensed waveforms, and compares them to determine the source of distortion. If the percentage total harmonic content sensed at the point of regulation is greater than that sensed at the terminals of the source of electric power, the source of distortion is discriminated to be the utilization equipment; otherwise, the source of distortion is identified to be the source of electric power.

Abstract: A security system utilizing a key-mounted transponder achieves fast and accurate charging of the transponder by using a frequency search and acquisition phase which attempts partial charging pulses at a plurality of spaced frequencies. After a successful partial charging, a frequency calibration signal is received from the transponder which provides a reference in the transceiver for producing a pulse for fully charging the transponder. Frequency search and acquisition allows robust system operation while using low cost and low tolerance parts.

Abstract: A method and an apparatus can determine the orders (z) of non-characteristic harmonic currents (Ih) of a second power supply grid, which is coupled to a first power supply grid using an HVDCT system. The apparatus and method also compensates for these non-characteristic harmonic currents (Ih), which are produced as a result of distortion (Uh) of the supply voltage (U1) which exists in the first grid because of a low-frequency harmonic and passes through the short coupling. The order (n) of the existing non-characteristic harmonics is determined by a voltage and/or current measurement of the voltage (U1) of the grid, from which order (n) the order (z) of the generated non-characteristic harmonics in the second grid is determined by a provided voltage-symmetry signal (SMG). This order (z) is supplied to filter logic of a compensation system. The energy quality is thus considerably improved, particularly in the case of grids which are not rigid.

Abstract: When an ignition switch detects that a key rotor of an ignition key cylinder has been turned to the accessory position by a key, a controller energizes a primary coil to cause it to output a high-frequency signal. In the key, a secondary battery is charged with a constant DC voltage generated from an AC voltage induced across a secondary coil. A transmission circuit is powered by the secondary battery, and allowed by a timer circuit to transmit a radio signal including an identification code during a predetermined period after the high-frequency signal is received by the key. Alternatively, the controller energizes the primary coil plural times with a cycle consisting of predetermined output and pause periods if the transmitted identification code does not coincide with a preset identification code at the first comparing attempt.

Abstract: A lock system has a remote operator, a lock provided with a switch actuatable by a key part of the operator, a central controller in the vehicle connected to elements of the vehicle for actuating same, a receiver, and a transceiver. The operator is separate from the motor vehicle and has the key part, an energy source, a transmitter powered by the energy source and actuatable to transmit a main signal containing a current main code word, and a transponder substantially independent of the transmitter and of the energy source for receiving an interrogation signal and thereupon generating a callback signal containing a callback code word. When the receiver in the motor vehicle receives the transmitted code work it sends a release signal to the controller. Alternately the transceiver can, when the switch is actuated, generate the interrogation signal, receive the callback signal, and send a release signal to the controller when the callback signal corresponds to the predetermined callback code word.

Abstract: An anti-theft system for a vehicle which monitors a state of a memory storing a check code so as to maintain a prohibition of operation of the vehicle when an abnormal state is detected in the memory. A control unit, provided in the vehicle, has a memory in which a first check code is recorded. A transmitting unit transmits a second check code to the control unit. The transmitting unit is separate from the control unit. Prohibition of operation of the vehicle is withdrawn when the first check code matches the second check code. The withdrawal of prohibition is prohibited when it is determined that the memory is not connected to the control unit. The withdrawal of prohibition may be prohibited when a first ID code stored in the memory does not match a second ID code stored in a second memory provided in the control unit.

Abstract: A keyless entry system for use with a mobile transmitter for transmitting an ID code specified therefor along with a command for vehicle door lock/unlock remote control to a control unit. The control unit is operable in an ID code registration mode for registering an ID code transmitted from the mobile transmitter. The transmitted ID code is compared with the registered ID code to permit the remote control specified by the transmitted command when the transmitted ID code is identical with the registered ID code. Upon completion of a first predetermined procedure including a plurality of sequential events of at least one first movable vehicle member provided on the vehicle, a second movable vehicle member is changed from a first position to a second position.

Abstract: A motor vehicle immobilization system having an anti-theft control device (13) and a function control device (10, 11) which is released by a regular unlocking communication with the anti-theft control device (13). To permit simple maintenance of individual engine function units, the function control device (10, 11) has bypass means (204 through 220) which permit an atypical unlocking of the function control device (10, 11) by the external device (19). The bypass means (204 through 220) include a time-delay device (206, 218) which, during atypical unlocking, only releases the function control device (10, 11) after the passage of a predetermined delay time (T.sub.F).

Abstract: A parallel hybrid active filter system for harmonic compensation of large non-linear loads is provided. The hybrid filter includes a passive filter connected in series with an inverter that is controlled to produce a dynamically variable inductance at selected harmonic frequencies. The passive filter may include passive capacitive and inductive elements, or may include a power factor correction capacitor alone, with all the inductance for the hybrid filter provided by the active filter inverter. The active filter inverter is controlled to provide the dynamically variable inductance by a synchronous reference frame (SRF) based controller that generates active filter inverter voltage commands that are fed to a PWM or square wave modulated voltage source inverter (VSI).

Abstract: A security system uses an ordinary switch, which may be an existing switch such as a parking light switch, to enter digits of a security code, with the beginning of a digit being indicated by turning on the ignition switch and the end of a digit being signified by turning off the ignition switch. Entry of the security code can be used to perform an emergency system disarm when the remote control transmitter is lost, to change the security code when the transmitter is in the possession of the owner, and to teach a new transmitter.

Abstract: A motor vehicle has a detector for detecting the presence of a valid radio frequency transmitter only within a seating space inside the vehicle. Start control circuitry is responsive to a RUN signal, provided that the detector has detected the presence of a valid radio frequency transmitter within the seating space, to unlock a steering column lock, activate an engine electric power circuit and a start motor, repeatedly receive an engine speed signal from the engine speed signal generator and compare the received engine speed signal to a predetermined speed reference indicating engine starting. The start motor is deactivated and a park lock solenoid is activated when the engine speed signal exceeds the speed reference. Alternatively, the engine electric power circuit and start motor are deactivated and the column lock is locked if the engine speed signal does not exceed the speed reference within a first predetermined time.

Abstract: In a vehicular communication system, a microcomputer of a transmission-reception electronic control unit (ECU) transmits stored data via an antenna coil to a transceiver disposed in an ignition key when the ignition key is inserted in an ignition key cylinder of a vehicle. During communication with the transceiver, the microcomputer outputs a key interlock actuating signal. While the key interlock actuating signal is being inputted to a key interlock control circuit, the key interlock control circuit operates a key interlock actuator to prevent the ignition key cylinder from being turned to a position at which the ignition key may be freely removed from the ignition key cylinder. Thus, the ignition key is prevented from being removed from the ignition key cylinder during communication between the ignition key transceiver and the microcomputer, thereby ensuring that data about the vehicle will be stored in a reception device disposed in the ignition key without a failure.

Abstract: An optical anti-theft system incorporates a member having a plurality of reflective surfaces. The plurality forms a pattern corresponding with the security code. The system additionally incorporates a base for receiving the member. The base incorporates a light source for generating a light beam to illuminate the plurality of reflective surfaces, and a light detector for sensing the illuminated plurality of reflective surfaces and for initiating a security function in response to the sensed illuminated plurality of reflective surfaces having the pattern.

Abstract: A line harmonics reduction module is enclosed in a chassis having a receptacle and a plug on opposite faces, for connection externally to a computer system unit or similar electronic equipment between the AC line power cord and the AC power receptacle contained in the computer system unit. The module may contain passive components such as an inductor, or may contain active circuitry designed to reduce the amplitudes of current components at harmonics of the line frequency by forcing the current waveform to be more nearly sinusoidal.

Abstract: A code locking mechanism that transmits information between a key and a locking mechanism secured against interception misuse, but flexible with respect to original equipment, replacement parts, and emergency functions, is obtained if the key code is, in each case, cryptographically encoded through a hardware encoder. When the locking mechanism is first operated, a control element, inductively coupled to a locking mechanism read-write unit with a new key once and in a non-overwritable manner, transmits an indent number to the object memory. Object-specific identity data are also stored in the control element. With the latter, a key number from a key register of the control element is combined with the key code to read the latter together with a roll-in random code into the set of first still-neutral keys and into the object memory. Thus, a key is valid only if the object-specific identity data are taken into account in its key code.

Abstract: A hybrid active power filter having programmed impedance characteristics is presented. In accordance with which, a passive device comprising a capacitor C.sub.F is connected in series with an active device which are together connected in shunt with a power source and a load at transmission lines of a power system. Capacitor C.sub.F substantially supports the full-line voltage V.sub.H of the power source, whereby the active filter is exposed to a substantially lower voltage than the line voltage V.sub.H. The active device includes an active filter, i.e., an inverter current regulator with a programmable controller for executing a control algorithm. The controller of the active device receives signals corresponding to a voltage V.sub.M, at the low side of filter capacitor C.sub.F. Voltage V.sub.M is at a substantially lower voltage than the line voltage V.sub.H, whereby the cost of sensing voltage V.sub.M is significantly less than sensing the high line voltage V.sub.H.

Abstract: A transmission line power controller for controlling the flow of electric power in an alternating current three-phase transmission system is described. The power line controller includes a parallel inverter connected to a series inverter through a dc link. The parallel inverter is connected in shunt to the transmission system through a shunt transformer. The series inverter is connected in series with the transmission system through a series transformer. A transmission line power control circuit is used to specify a desired real power demand and reactive power demand for the transmission system. The power control circuit processes this information along with a transmission line voltage vector and a transmission line current vector to produce a voltage source reference signal that is applied to the series inverter. In response to the voltage source reference signal, the series inverter produces an injected voltage vector into the transmission system.

Abstract: An anti-theft car protection device includes a key having an IC-chip embedded therein, and an ignition switch that can be turned by the key to any "OFF" position, an "ACC" position and an "ON" position. The device further includes an antenna mounted near the ignition switch, and a communication module that provides a radio communication between the IC-chip of the key and the antenna. The device also includes an immobilizer controller that determines, in accordance with an instruction signal issued from the communication module, whether or not the engine should be started. The communication module includes an electric field generating circuit that energizes the IC-chip of the key by causing the antenna to emit an electromagnetic wave, a transmitting/receiving circuit that carries out exchange of ID-codes with the IC-chip through the antenna, and a system control circuit that controls both the electric field generating circuit and the transmitting/receiving circuit.

Abstract: A hybrid parallel active/passive filter system is provided which provides line power harmonic isolation and compensation for power systems connected to high power non-linear loads. The hybrid filter includes a passive filter connected in series with an active filter inverter. The active filter inverter is controlled to generate inverter voltages such that the filter terminal voltage tracks the supply voltage harmonics at a selected dominant harmonic frequency to regulate the supply current harmonics to zero. A synchronous reference frame (SRF) based controller is used to generate harmonic inverter voltage commands based on measured supply current values. A feed forward command signal generator may be used to improve the response of the control system. The active filter inverter is preferably implemented as a square-wave inverter. The active filter inverter DC bus is controlled to achieve power balancing and to provide real power to compensate for losses of the inverter.

Abstract: An active power line conditioner that removes or cancels harmonic currents in power lines. The active power line conditioner is used with a power distribution system. The power distribution system includes an A/C source which supplies alternating half cycles (A/C) of voltage and current through a power line to an electrical load. An electrical load draws harmonic frequency current from the power line. The active power line conditioner comprises a current sensor, a first template circuit, a comparison circuit, and a current absorption and supply circuit. The current sensor is coupled to the power line and has an output comprising a sensed current signal representative of the current in the power line. The first template circuit has an output comprising a preferred current template that represents a desired sinusoidal current at the fundamental frequency of the power line and which is free of harmonic components.

Abstract: A vehicle controller is presented for use in a remote keyless entry system for controlling a vehicle device function. The controller includes a receiver for receiving a RF request signal including a security code uniquely identifying a portable transmitter that is authorized entry into the vehicle and for controlling access to the vehicle when the received security code matches a prestored security code. A circuit board carries the receiver and a flat ground plane. A helical antenna is mounted on the circuit board and includes an elongated conductive member having one end electrically connected to the receiver means and an opposite free end. The conductive member is helically coiled about a helical axis intermediate the ends thereof with the helical axis being perpendicular to the ground plane. The antenna is configured to provide an omni-directional radiation pattern about the helical axis.

Abstract: A device for controlling keyless access to a motor vehicle includes a transceiver to be carried by a user. A distance detecting device measures a distance between the transceiver and a motor vehicle. A transmitting unit being disposed in the motor vehicle and being associated with a tripping device broadcasts a question code signal when the tripping device is actuated. The transceiver has a receiver for receiving the question code signal, and the transceiver has a transmitter for broadcasting an answer code signal only whenever the motor vehicle is located in the immediate vicinity of the transceiver. A receiving unit disposed in the motor vehicle receives the answer code signal from the transceiver and furnishes an unlocking signal to an unlocking unit if the answer code signal matches a set-point code signal.

Abstract: A method of resetting a central lock system of a motor vehicle automobile connects a diagnostic device to a fixed part of the system. When the central unit is switched to the "SETUP" mode, the key of a new portable unit is inserted into a key-operated switch to interrogate a transponder of the portable unit, a transponder querying transceiver of the fixed unit to derive a key-identification code word which is stored in the transponder and in a memory of the transceiver. The transmitter is then operated to send a remote-control changing code word which progressively changes in the transmitter, to the receiver. The latter picks up the then-effective remote-control changing code word and stores it in the transceiver and transponder code word storage memories as a new transponder changing code word. The fixed unit is then switched back to its "NORMAL" mode.

Abstract: An antitheft apparatus for an automobile includes an engine starting key storing an identification code allocated inherently, a code reading circuit for reading out the identification code from the engine starting key inserted in a key cylinder installed on the automobile, a code collating circuit for collating the identification code supplied from the code reading circuit with a verification code stored previously, and an engine start decision circuit for enabling engine starting operation when the identification code coincides with the verification code, while upon occurrence of a discrepancy between the identification code and the verification code, for enabling the engine starting operation only when a door or accelerator pedal of the automobile is actuated in a predetermined manner. The automobile can be operated even when the key is lost or damaged and the identification code is unavailable.

Abstract: An anti-theft car protection system comprises a transmitter-receiver for receiving a code of the key, an immobilizer unit for collating said code as received with a code as registered and transmitting an engine start permission signal to an engine control unit when said code as received coincides with said code as registered, and means, cooperating with said immobilizer unit, for removing repetition of key operation upon start of the engine.

Abstract: A security system for an automotive vehicle having an engine is operatively connected between engine running electrical components that are connected to an electrical power source and a lock switch having at least two operative positions. The security system has a key with a memory device carried thereon with a first security code stored in the memory device. A theft control module having a memory storing a second security code is operatively connected between the switch and the engine running electrical devices. The theft control module operates to first permit the engine running electrical components to enable the starting of the engine and then to compare the first and second security codes. Before starting the engine, a counter is compared to a predetermined number so that the engine starting is limited to only a predetermined number of attempts. The engine is disabled if the number of attempts exceeds the predetermined number.

Abstract: An anti-theft apparatus prevents a delay in engine start caused by an ID legitimacy determination performed by an immobilizer. When an ignition key is operated, a starter motor is immediately energized and an engine control unit and a theft detector are actuated at the same time. Then, when independent running of the engine is detected by a detector, an immobilization determining section determines whether an enable code has been provided from the theft detector. If no enable code is present, then the immobilization determining section issues a halt command to the engine control unit. Thus, as soon as the key is turned to the on-position, the engine is started, thereby preventing a delay in engine start caused by the ID determination performed by the immobilizer.

Abstract: A method for charging a transponder using a transceiver, the method including the steps of powering the transceiver, emitting a transmit pulse from the transceiver, powering the transponder using the transmit pulse, generating a calibration signal with the transponder, transmitting the calibration signal to the transceiver, calibrating the transceiver based on the calibration signal received from the transponder, emitting a charge pulse from the transceiver to the transponder, and charging the transponder with the charge pulse.

Abstract: An enabling device for a motor vehicle having an electronic ignition system including an engine control circuit for controlling the electronic ignition system of the motor vehicle, a hardware limited operating system for controlling the electronic ignition system, a latch electrically connected to the control circuit to enable the electronic ignition system, and an override circuit electrically connected to the latch and the hardware limited operating system to enable the hardware limited operating system.

Abstract: A filtering device, connected between an electrical power supply source and a load, comprises an active filter connected to the source and to the load, and a passive filter connected to the load. A voltage, generated between two terminals of the active filter, is monitored by first and second circuits. The first circuit receives a signal representative of a current, and monitors the voltage according to the signal representative of the current on input of the filtering device and to a first coefficient. The second circuit receives a signal representative of a voltage, and monitors the voltage according to the voltage signal and to a second coefficient. The first and second coefficients have values variable according to the frequency.

Abstract: A reflector-pump network is provided for insertion between an AC power supply source and a full-wave rectifier in an AC-DC power converter. The complex harmonic current demands generated by the full-wave rectification process are satiated by a pump in the network. Such complex harmonic current demands are further isolated from the AC power source by the reflectors in the network.