302 results about "Ignition voltage" patented technology

A vehicle lighting system for a vehicle includes an accessory module assembly that is adapted for attachment to an interior portion of a vehicle and configured to illuminate, for example, an area inside the vehicle. The module assembly includes a single high-intensity power light emitting diode that has a luminous efficiency of at least about 1 lumen per watt when the light emitting diode is operated and is preferably operated at a forward current of at least 100 milliamps. The system also includes a voltage conversion element for converting the battery/ignition voltage of the vehicle to the forward operating voltage of the light emitting diode.

A circuit arrangement and control thereof for igniting a high intensity discharge (HID) lamp, for reducing the high frequency ripple superimposed on the low frequency rectangular waveform lamp current after ignition, and for increased circuit efficiency. The high frequency ignition voltage is only applied to the lamp during ignition phase and is mainly generated by the second stage of the low pass (LP) filter. The first stage of the LP filter whose resonant frequency is below the second stage further attenuates the high frequency ripple current through the lamp in normal operation. The resulting lamp current is a low frequency rectangular wave with less than 10% high frequency ripple. Acoustic resonance is avoided. The inductor in the first stage of LP filter is operated in discontinuous current mode. Doing so, the active switches are in zero current switching (ZCS) to maximize the circuit efficiency.

A lighted exterior mirror system includes an exterior mirror assembly having a folding portion and a non-folding portion. A ground illumination light of the exterior mirror assembly is configured to illuminate with white light a ground area adjacent the equipped side of the vehicle at least at a front door region at the side of the vehicle where occupants may enter/exit exit the vehicle. The ground illumination light includes at least one light emitting diode, which is connected in series with a resistor that acts as a voltage divider to reduce an ignition voltage of the equipped vehicle to a reduced voltage, with the resistor having a resistance of less than about 1,500 ohms. The ground illumination light provides ground illumination of at least about one lux illumination intensity at least on the ground area adjacent the front door region at the equipped side of the vehicle.

There is provided by this invention an apparatus and method of supplying to ignite a plasma wherein in the event of an arc a shunt switch is used to divert the power away from the plasma that is incorporated into an over-voltage protection circuit that controls the shunt switch to act as a boost switch when the arc is extinguished such that the stored inductor energy is used to boost the ignition voltage for reigniting the plasma if it is extinguished. When the arc is extinguished, the inductor current is diminished, and the plasma is ignited, then the switch S1 is turned OFF and the inductor energy goes to the plasma and the power supply operates in its normal operating mode.

The invention discloses an engine rotating speed measuring method and an engine rotating speed measuring device based on a DSP (digital signal processor). The method comprises the steps of acquiring engine vibration signals, exhaust sound signals or engine ignition voltage signals, carrying out AD conversion on the acquired signals, and sampling signal data subjected to AD conversion according to a preset sampling rate; carrying out amplitude limiting digital filtering and hamming function adding processing on the sampled data; carrying out fast Fourier transformation on the processed data for enabling time-domain sampling data to be converted into a frequency spectrum value in frequency domain, and calculating amplitude values of various frequency points; calculating a frequency value corresponding to an engine according to a frequency fundamental wave spacing method; obtaining the rotating speed of the engine according to the relationship between the rotating speed of the engine and the frequency value corresponding to the engine. Therefore, the rotating speed measuring precision and the anti-interference capability are improved, and the misjudgment rate is reduced.

The invention relates to an ignition method of a plasma hall thruster, which belongs to the field of control on hall thrusters and aims to solve the problem that an existing hall thruster needs to be ignited by an extra ignition power supply. The method disclosed by the invention is characterized by adding an ignition loop into a low-frequency oscillation suppression outside loop to replace an ignition power supply U3, wherein the ignition loop comprises a controllable switch S1 and a diode unit D1. The method comprises the following steps: (1) heating a power supply U2 so as to heat a cathode K to the ignition temperature, (2) controlling to close the controllable switch S1 and keeping for the time T1, and (3) controlling to open the controllable switch S1, and loading an anode A and the cathode K of the hall thruster with ignition voltage U(t) which is equal to U1+UL(t), wherein when electrons which are guided out of an outlet area of the cathode by the ignition voltage U(t) satisfy discharge voltage, the ignition of the hall thruster is completed.

The invention discloses an engine state monitoring method based on an automobile voltage. The method comprises the following steps of: enabling a control module to read a power supply voltage of an automobile through an external analog to digital converter every second; storing the read power supply voltage into a circulating linked list according to a time sequence; calculating and recording an ignition voltage and a flame-out voltage of an automobile engine by using a memory algorithm; and judging the current state of the automobile engine by using the ignition voltage, the flame-out voltage and the current power supply voltage of the automobile engine. Through the adoption of the engine state monitoring method based on the automobile voltage, disclosed by the invention, an additional peripheral device is not needed, the judging accuracy is made accurate, and the design and use cost is also reduced; in addition, supports from automobile manufacturers or manufacturer models are not needed, so that the generality of the engine state monitoring method based on the automobile voltage is satisfied.

The invention discloses an ignition detection device and an ignition detection method for an automobile. The method comprises the following steps: S1, detecting real-time voltage output by a storage battery; S2, if a vibration sensor detects a vibration signal, recording vibration signal information; S3, outputting low voltage which is lower than the voltage stably output by the storage battery at a certain time interval by an MCU (Microprogrammed Control Unit) processor; S4, judging the primary time interval of the real-time voltage output by the storage battery in the time interval of the low voltage is in the ignition voltage state of the automobile or not; S5, judging whether a recorded vibration signal of which the generation time interval is comprised in the time interval in which the real-time voltage output by the storage battery is in the ignition voltage state of the automobile exists or not, and judging that ignition operation is performed on the automobile if the vibration signal information exists. By adopting the ignition detection device and the ignition detection method for the automobile provided by the invention, a user can judge the ignition state of the automobile, so that the use of electronic equipment in a vehicle can be reduced consciously when the vehicle is in a non-ignition state, the power consumption of the storage battery is lowered, and the service life of the storage battery is prolonged.

The invention discloses a circuit for a pulse plasma thruster, which comprises an ignition circuit, an energy storage circuit and a control circuit, wherein a singlechip in the control circuit outputs chopped wave signals; and pulse transformers in the ignition circuit and the energy storage circuit charge an ignition capacitor and an energy storage capacitor. When sampling voltages of the positive input ends of two voltage comparators reach a set ignition voltage and a set energy storage voltage respectively, the singlechip stops outputting the chopped wave signals, and after a set delay time, outputs ignition signals which generate trigger pulse high-tension electricity by the pulse transformer in the energy storage circuit, and then the pulse high-tension electricity is discharged to break gas discharge tubes down to produce electric spark to trigger ignition. The circuit has the advantage of realizing quick and controllable charge and accurate triggered ignition.

A method for controlling an ignition system of an internal combustion engine having a primary firing pulse generator for charging a capacitor. An electronic switch is included for discharging the capacitor via an ignition coil to generate an ignition voltage. A microcomputer operates the switch to control the ignition timing of the generator. The microcomputer is in communication with a speed sensor that detects the rotational speed of the engine and a speed limitation control that limits the engine speed to a limitation speed below the clutch-in speed of an included centrifugal clutch. The speed limitation control is active or activated when one of either starting the engine or an operating problem of the power tool is detected. The speed limitation control is deactivated when a low speed state of the engine is detected.

When RF power is supplied from an RF generator to a load via a power supply unit,

• (a) the internal impedance of the RF generator is made lower than the characteristic impedance of the power supply unit, and
• (b) the load-end voltage is increased by selecting the electrical length L_E of the power supply unit, which connects between the RF generator and the load to supply RF power, so that the electrical length L_E has a predetermined relation with the fundamental wavelength λ of the RF AC. More specifically, the electrical length L_E of the power supply unit is selected in such a way that, when the load end, which is the input end of the load, is in an open state, the electrical length L_E is (2n−1)·(λ/4)−k·λ≦L_E≦(2n−1)·(λ/4)+k·λ (n is an integer, k is {π−2·cos⁻¹(1/K)}/(4π)) with respect to the fundamental wavelength λ of the RF AC.

A higher voltage out of a battery voltage applied to an ignition voltage terminal or a control voltage applied to a control voltage terminal is supplied to a switching regulator via a diode. Then, a supply of current to an LED in the switching regulator is controlled in compliance with the control voltage while using an input voltage as energy. When a PWM signal is input into a control voltage terminal as the control voltage, transistors are turned off and on, whereby an instruction to turn-on the-LED in a dimmed lighting mode is issued to the switching regulator. Then, a current that is smaller than that supplied in a full lighting mode is supplied to the LED.

The invention relates to a method and generator for generating a time sequence of EDM pulses having a predefined ignition voltage for electrical discharge machining. An AC voltage is generated from a DC voltage, furnished by a bipolar current source. The AC voltage is applied to an isolating transformer disposed between the bipolar current source and the spark gap. A first pulse capacitor is charged by the bipolar current source to a voltage corresponding to the ignition voltage. The ignition voltage provided by the isolating transformer is switched with a selected polarity to the spark gap.

The present invention is a Universal Automotive Ignition Pickup Assembly that produces an ignition secondary voltage waveform that can be monitored by an oscilloscope or microprocessor. This is accomplished with a sensing probe that can be capacitive coupled; inductively coupled; or capacitive and inductively coupled at the same time. Due to the ability of a pickup to be capacitive and inductive at the same time, the ignition voltage waveforms are clear and concise from secondary ignition wires to a multitude of different ignition coil types.

The invention discloses a method for estimating an output voltage of an ignition coil. In the method, the maximum output voltage of the ignition coil at each effective engine rotating speed is compared with a mixed gas limiting breakdown voltage and at each effective engine rotating speed, if the difference obtained by subtracting the mixed gas limiting breakdown voltage from the maximum output voltage of the ignition coil is greater than a set voltage, the output voltage of the ignition coil meets the requirement of an engine ignition system, wherein at one engine rotating speed, if an ignition current in the igniting process under the maximum ignition voltage of the ignition coil is reversed, the engine rotating speed and the maximum ignition voltage of the ignition coil at a corresponding point are eliminated as invalid values; and the maximum ignition voltage of the ignition coil at each engine rotating speed, which is subjected to elimination of the invalid values, is used as the mixed gas limiting breakdown voltage at each effective engine rotating speed. The invention also discloses a system for estimating the output voltage of the ignition coil. According to the invention, the output voltage of the ignition coil can be accurately estimated.

The invention discloses a Ni-Cr alloy thin film igniter with a low ignition voltage and a preparation method thereof and belongs to the technical field of a priming system. The Ni-Cr alloy thin film igniter with the low ignition voltage comprises a base; an isolating film is arranged on the base; an igniting element is arranged on the isolating film; the igniting element is provided with a bonding pad area of an igniter lead wire; and the igniting element is made of Ni-Cr alloy. According to the preparation method provided by the invention, the igniter is prepared by using a micro-machining technology. In the Ni-Cr alloy thin film igniter, the ignition is reliably realized at a lower ignition voltage; the ignition voltage is as low as 4.8 V/10 muF and the ignition energy is as low as 100 mJ; and the shake-proof performance is good.

The invention discloses a composite dielectric protective film of a plasma display panel (PDP). The composite dielectric protective film on a dielectric layer on a front substrate of the PDP comprises a crystalline grain of a core-shell structure, wherein the inner-layer core of the crystalline grain is made of a material with high secondary electron emission coefficient; and the outer-layer shell of the crystalline grain is made of magnesium oxide. The composite dielectric protective film has high secondary electron emission coefficient, high lagging electron emission speed and good sputtering resistance, and can obviously reduce the ignition voltage and maintaining voltage of the PDP, shorten the addressing time and prolong the service life of the PDP. At the same time, the invention also provides a method for preparing the composite dielectric protective film of the PDP.

Disclosed is an emergency ignition device for a vehicle. When a vehicle storage battery cannot ignite the vehicle, an anode battery clamp and a cathode battery clamp are connected with an anode and a cathode of the vehicle storage battery respectively. A protection module detects whether the output voltage of the vehicle storage battery meets the voltage condition, that is, larger than or equal to a first threshold value and smaller than or equal to a second threshold value. The protection module sends voltage protection drive signals to a control switch when the output voltage of the vehicle storage battery meets the voltage condition, and the control switch is connected continuously when receiving the voltage protection drive signals to enable coils of a relay to be energized continuously, a relay switch of the relay is closed continuously, an emergency power supply is used for providing ignition voltage for the vehicle to start the vehicle, and the vehicle storage battery can be charged simultaneously.

The invention discloses a method for active purification of air in vehicle after shut-down and parking. The air-conditioning controller is configured as: after the vehicle shuts down and parks, the ignition voltage IGN is OFF and an air-conditioner controller can control an actuator of a HVAC, the actuator includes a blower, an inner and outer circulation air door, a mode wind door and a temperature wind door; the method comprises the following steps of: starting the timer to timing in response to the shutdown of the vehicle and the complete closure of all the doors; and performing the activeventilation action when the timing time reaches the preset time and the current accumulator voltage is greater than the preset voltage value. The method can effectively reduce the car odor and harmfulVOCs in the long-term parking vehicles after the shutdown, and greatly increase the user's satisfaction with the air in the vehicle with very low cost.

A ballast (10) for powering at least one gas discharge lamp (70) in a program start mode comprises an inverter (200), a resonant output circuit (400), and a control circuit (600). During operation of ballast (10), control circuit (600) monitors a voltage within resonant output circuit (400). When the monitored voltage reaches a first specified level that is indicative of sufficient filament preheating, control circuit (600) maintains the inverter operating frequency at a first present value for a preheating period so as to provide preheating of lamp filaments (72,74). Following completion of the preheating period, control circuit (600) allows the inverter operating frequency to decrease. When the monitored voltage reaches a second specified level that is indicative of sufficient ignition voltage, control circuit (600) maintains the inverter operating frequency at a second present value for an ignition period so as to provide ignition of lamp (70).