1272 results about "Ignition control" patented technology

A variety of methods and arrangements for controlling the operation of an internal combustion engine in a skip fire variable displacement mode are described. In general, a firing control unit determines working chamber firings during operation of the engine that are suitable for delivering a desired engine output. In one aspect, the firing control unit is arranged to isolate the generation of firing sequences having frequency components in a frequency range of concern and to alter the firing sequence in a manner that reduces the occurrence of frequency components in the frequency range of concern. In another aspect, a filter is arranged to filter a feedback signal to provide a filtered feedback signal that is used in the determination of the working chamber firings. In preferred embodiments, the frequency characteristics of the filter are variable. In various embodiments, the frequency characteristics of the filter vary as a function engine speed and/or a transmission gear ratio.

A vehicle ignition interlock system includes a breath analyzer and a controller operably connected to the breath analyzer and to an ignition system of the vehicle. The controller compares detected breath alcohol levels of the vehicle operator with a threshold value, and is configured to prevent vehicle ignition if a breath alcohol level detected by the breath analyzer is greater than or equal to a threshold value. The controller also requires the vehicle operator to periodically take breath analyzer retests after vehicle ignition in order to allow vehicle operation to continue. The controller can reduce the frequency of periodic retests in response to one or more retests when the breath alcohol level of the vehicle operator is below a threshold value. The system may include a transdermal alcohol sensor, a mouth contamination sensor, a mouth contamination sensor, and redundant alcohol sensors.

In a multiple discharge ignition control apparatus, a battery, an energy storage coil and a first IGBT are connected in series. Further, the energy storage coil, a diode, a primary coil and a second IGBT are connected in series. The energy storage coil is connected with a capacitor through the diode, and a secondary coil is connected with a spark plug and a resistor for current detection. An ignition control circuit switches the IGBTs between ON and OFF each time the secondary current detected by the resistor reaches a positive or negative discharge holding current in multiple discharge operation. A booster circuit is provided in addition to the energy storage coil and its output is feedback-controlled.

The invention provides a work system of an electronically controlled gasoline engine, comprising an air intake system, a fuel oil supply system, an ignition system as well as an electronic control system; the electronic control system consists of a sensor section, an electronic control unit ECU and an actuator section, wherein, the sensor section includes a throttle position sensor, an intake pressure and temperature sensor and an intake temperature sensor which are arranged on an intake pipe of an intake system, a camshaft position sensor, a coolant temperature sensor and a crankshaft position sensor which are arranged on the engine, a front oxygen sensor arranged in front of a three-way catalyst converter on an exhaust pipe of the engine, and the components of the sensor section are all connected with the ECU, and the actuator section consists of an electric fuel pump, an oil sprayer, an idle speed regulating valve and an ignition coil; the components of the actuator section are all connected with the ECU, and the ECU includes a fuel injection control program, an ignition control program and an idle speed control program; the system adopts reasonable control strategy and has comprehensive control function, good integrated performance of control function and fine system portability.

Methods and systems are provided for mitigating engine pre-ignition based on a feed-forward likelihood of pre-ignition and feedback from a pre-ignition event. In response to an indication of pre-ignition, a cylinder may be enriched while an engine load is limited. The enrichment may be followed by an enleanment to restore exhaust catalyst feed-gas oxygen levels. The mitigating steps may be adjusted based on engine operating conditions, a pre-ignition count, as well as the nature of the pre-ignition.

The invention provides an FPGA (Field Programmable Gate Array) based ground launching control device of a small and medium-sized rocket. The device comprises a main control computer, a ground control box, a signal conditioning case which uses FPGA as the core, and a missile device; the main control computer receives and feeds back a signal through an RS422 communication interface; the ground control box is used for performing hardware control for the system; the signal conditioning control case comprises the combination of a PCB and a power supply; the PCB comprises a level isolation conversion circuit which uses the FPGA as the core, a power-on sequence control circuit, a voltage AD acquiring circuit, an RS422 isolation conversion circuit, an RS422 relay circuit, a level conversion circuit in a head power supply circuit, and a corresponding filter circuit; the missile device comprises a missile distributor, a missile battery combination and a missile electrical device. With the adoption of the device, the functions of supplying power to the missile device from the ground, activating the missile battery, converting power, cutting off power supply, controlling a pressure release valve, and controlling ignition can be realized; the device has the characteristics of being safe, reliable, small in cost, short in development cycle, fast in speed, high in efficiency, and high in real-time performance.

An ordnance control and initiation system is provided. The system includes a plurality of ordnance devices which may be segregated into a plurality of sets. Each set of the ordnance devices has at least one ordnance device and further includes an ordnance device interface, which preferably includes an optical-to-electrical converter. A controller issues state commands to a master ignition control module operatively coupled to the controller, which re-transmits the state commands to a plurality of slave ignition control modules. Each of the slave ignition control modules associated with one of the sets of the ordnance devices and preferably is optically coupled to each of the ordnance devices within that set. The slave ignition control modules re-transmit the state commands optically to the ordnance devices of the associated the ordnance device set of that slave ignition control module. A capacitive device may be used at the optical-to-electrical converter to store the electrical energy received through the state signal and to selectively discharge that energy into an initiator at the ordnance device to initiate the device. Related devices and methods are disclosed as well.

The invention provides an electronic primer control chip which comprises a charge control circuit, a power supply management circuit, an ignition control circuit, a logic control circuit, a safe discharge circuit and so on. The electronic primer control chip in particular comprises a sensing circuit. The mains input end of the sensing circuit is connected with the power supply management circuit,and the other end is connected with the logic control circuit. The signal input end is connected with the charge control circuit and the safe discharge circuit. The sensing circuit comprises a sensing control circuit, a comparator and a PMOS tube, which can adopt a Schmidt inverter. The invention further provides a method for sensing the connection reliability of the chip. Firstly, the initial state of the chip is sensed; secondly, the charge circuit is sensed; thirdly, the ignition circuit or the safe discharge circuit is sensed; fourthly, an energy storage device is charged; subsequently, the circuits which have not be sensed in the ignition circuit and the safe discharge circuit are sensed; finally, the chip is set back to the initial state. In this way, an electric primer is sensed online; and the use reliability is improved.

The invention provides an explosion dynamic-load fracturing simulation test device mainly used for simulating the explosion fracturing process of an explosive in underground rock and comprising a high-pressure autoclave, a hydraulic control system, an ignition control system and a data acquisition system. The high-pressure autoclave is the main part of the whole test system and mainly comprises a base, a pressure chamber cylinder, a pressure gasket, a pressure plate, a pressure chamber upper cover, a ferrule, a clasp, a bidirectional piston, and the like; an oil cylinder and a bidirectional piston are mounted in the center of the pressure chamber upper cover, the pressure chamber upper cover can apply an axial load to a sample on a basis of confining pressure; the base and the bidirectional piston are provided with oil inlets which are connected with the hydraulic control system through high-pressure pipelines; the wall of the pressure chamber cylinder is provided with an explosive lead hole and a data wire lead hole which are respectively connected with the ignition control system and the data acquisition system by leads; and the pressure chamber upper cover and the base are respectively mounted at the upper end and the lower end of the pressure chamber cylinder and connected and fixed by the ferrule and the clasp so that the autoclave body has favorable high pressure resistance and can carry out a dynamic-load fracturing test on a large-size sample (the diameter of 800*800mm).

An electronic ignition control system includes a keyfob having a biometric sensor that senses an identifying biological characteristic of the user. The keyfob also has a transmitter that transmits an air-borne signal dependent upon the identifying biological characteristic. A vehicle includes a motor and an ignition that starts the motor. The ignition has an unlocked state in which the user can cause the ignition to start the motor by actuating a start mechanism. The ignition also has a locked state in which actuation of the start mechanism by the user does not cause the ignition to start the motor. The vehicle also has a receiver that receives the air-borne signal from the transmitter. The vehicle further has a controller in communication with each of the ignition and the receiver. The controller switches the ignition from the locked state to the unlocked state dependent upon the air-borne signal received by the receiver.

An ignition control device for controlling a multi-spark operation comprises: a secondary electric energy generator generating an electric energy to reignite an air fuel-mixture associated with an internal combustion engine during the multi-spark operation; a switching element capable of controlling the supplying of the electric energy to a primary coil of an ignition coil, the controlling causing a secondary current in a secondary coil of the ignition coil; an ignition timing signal generator generating an ignition timing signal based on a driving state of the engine; a multi-spark period setting element setting a multi-spark period of the multi-spark operation based on the ignition timing signal; and an ignition control element setting an amount of electric power supplied to the secondary electric energy generator based on the multi-spark period before the performing of the multi-spark operation is started, and for controlling the switching element.

A gas heater with specialized controls allows an operator to deploy a single device to heat and to dry when extracting moisture from a structure. The heater has a fan in a blow thru arrangement ahead of a burner. The burner uses either natural gas or liquefied petroleum gas. The heater has air flow, fan motor, temperature, and ignition controls and sensors. The heater delivers high temperature air to the structure that hastens evaporation as the heated air absorbs great concentrations of water vapor. Then the moisture laden heated air exits the building as the heater draws in fresh air, ducts it into a structure, and pressurizes the structure. This moisture laden air then leaks from the building through select windows using the energy imparted from the fan and then exhausts the moisture to the atmosphere, drying the structure.

The invention discloses an intelligent anti-theft vehicle starting method and system. The method comprises the steps that a mobile terminal collects a facial image, feature extraction is performed on the facial image to form facial feature data, and the facial feature data are sent to a server; the server receives the facial feature data and compares the facial feature data with a feature template, and the server sends a pass command if the comparison result shows that the facial feature data and the feature template are consistent; the mobile terminal receives the pass command, then generates a dynamic encryption command and sends the dynamic encryption command to a control circuit board in a vehicle; the control circuit board performs handshake check on the dynamic encryption command, and the control circuit board controls an ignition circuit and a door opening circuit of the vehicle to be connected if the dynamic encryption command passes the check. According to the intelligent anti-theft vehicle starting method and system, the facial recognition technology is achieved through the mobile terminal and the server; as control over door opening and control over ignition control of the vehicle are organically combined, a low-cost intelligent unlocking function is achieved; because the intelligent anti-theft vehicle starting system cannot be broken through direct damage and removal, or signal shielding or other means, other people cannot start the vehicle through a vehicle key even if the vehicle key is stolen or lost, and the anti-theft security level of the vehicle is improved.

A vehicle ignition interlock system includes a breath analyzer and a controller operably connected to the breath analyzer and to an ignition system of the vehicle. The breath analyzer detects the breath alcohol level of a vehicle operator and is configured to prevent vehicle ignition if a breath alcohol level is greater than or equal to a threshold value. The controller requires the vehicle operator to periodically take breath analyzer “retests” after vehicle ignition in order to allow vehicle operation to continue. The breath analyzer also detects the presence of alcohol within the vehicle, such as alcohol emanating from an open container of alcohol. The controller may override one or more periodic retests if alcohol is not detected within the vehicle over a predetermined period of time. In addition, the controller may increase the frequency of periodic retests of the vehicle operator in response to detecting alcohol within the vehicle.

A control system for controlling the ignition of a plasma-jet spark plug provided in an internal combustion engine senses an operating condition of the internal combustion engine, and determines an ignition mode of the plasma-jet spark plug in accordance with the sensed operating condition. The control system performs an ignition control of breaking down the insulation across a spark discharge gap by applying a first electric power to the plasma-jet spark plug, and producing plasma in the vicinity of the spark discharge gap by applying a second electric power to the spark discharge gap in a state of dielectric breakdown. The control system performs this ignition control according to the ignition mode determined as mentioned above.

Problems: For enhanced safety of a work apparatus with an internal combustion engine, a cutting element is prevented from an accidental run due to an accidental increase of the engine revolution while a throttle control trigger is in a released state.

Solution: In an engine start period, a throttle valve (10) is in a first idling position. The engine 2 at its initial run phase does not increase in revolution because of instability of its running condition. When the running condition begins to stabilize, the revolution rapidly increases. When the engine revolution (Ne) reaches 4,000 rpm or higher, a non-firing control mode is set up. In the non-firing control mode, when the engine revolution reaches or exceeds 4,500 rpm, a non-firing processing is executed (S4). A centrifugal clutch (6) is designed to engage at 5,000 rpm.