19results about "Ignition safety means" patented technology

To provide a technique which can prevent an electric discharge in an ignition plug at an unexpected timing.SOLUTION: An ignition device 1 for an internal combustion engine using a fuel containing hydrogen has an ignition coil 103 including a primary coil L1 and a secondary coil L2, a power supply device 102, a switching element 70, an ignition plug 113, and a limiting diode 114. The switching element 70 make a switch to carrying or interrupting a primary current flowing to the primary coil L1. The ignition plug 113 discharges electric at a gap d on the basis of a high voltage inducted at one end 822 of the secondary coil L2. The limiting diode 114 is a zener diode or an avalanche diode having a forward direction from the one end 822 of the secondary coil L2 to the other end 821. A breakdown voltage of the limiting diode 114 is larger than a maximum value of a voltage in ON, which is calculated by multiplying a direct current voltage value applied to one end 811 of the primary coil L1 by a ratio of a winding number of the secondary coil L2 to a winding number of the primary coil L1.SELECTED DRAWING: Figure 1

The application provides an over-temperature protection device of an igniter control module, comprising a control unit, a voltage stabilizing filter unit connected to a positive voltage input end of the control unit and configured to provide a power supply voltage for the control unit, a first series voltage dividing unit connected to a same-phase input end of the control unit and configured to provide a reference voltage for the control unit, and a second series voltage dividing unit connected to an inverse-phase input end of the control unit and configured to monitor the temperature of an IGBT power tube and convert the temperature into a monitoring voltage; wherein an output end of the control unit is connected to a gate of the IGBT power tube, and the control unit compares the monitoring voltage with the reference voltage and outputs a control signal for controlling the IGBT. The over-temperature protection device of the igniter control module can effectively control the overall temperature of the igniter control module, and can improve the heating condition of the igniter.

A usage management system for vessel propulsion apparatuses includes a use rights management server and a user terminal device. A controller of a vessel propulsion apparatus operates a prime mover in a permission mode to permit an output exceeding a predetermined limit output if use permission is provided from the user terminal device, and operates the prime mover in a non-permission mode to prohibit an output exceeding the predetermined limit output if use permission is not provided from the user terminal device. The user terminal device enters an active state to allow issuance of use permission if a use-permission notification is received from the use rights management server, and enters a non-active state to prohibit issuance of use permission if a use-permission notification is not received from the use rights management server. The use rights management server refers to use rights information concerning the vessel propulsion apparatus, and transmits a use-permission notification or a use-non-permission notification in accordance with use rights information.

To provide a technique which can prevent an electric discharge in an ignition plug at an abnormal timing.SOLUTION: An ignition device 1 for an internal combustion engine using a fuel containing hydrogen has an ignition coil 103 including a primary coil L1 and a secondary coil L2, a power supply device 102, a switching element 70, an ignition plug 113, a first backflow prevention diode 111, and a first resistance 112. The switching element 70 make a switch to carrying or interrupting a primary current flowing to the primary coil L1. The ignition plug 113 discharges electric on the basis of a high voltage inducted at one end 822 of the secondary coil L2. Between the other end 821 of the secondary coil L2 and the power supply device 102, two first connection lines 122a, 122b are arranged in parallel. The first backflow prevention diode 111 is inserted in the first connection line 122a, and has a forward direction from the one end 822 of the secondary coil L2 to the other end 821. The first resistance 112 is inserted in the first connection line 122b, and has a resistance value of 1 MΩ or more.SELECTED DRAWING: Figure 1

In an internal combustion engine (1), a fuel containing hydrogen is supplied to a combustion chamber. A control unit (4) controls execution of the discharging of a spark plug (2) by controlling eletrification of an ignition coil (3). The control unit (4) performs control so as to execute normal discharging and waste discharging in a discharge gap (G). In normal discharging, the fuel in the combustion chamber is ignited. In waste discharging, energy remaining in the ignition coil (3) is released after normal discharging. The discharge energy in waste discharging is less than the discharge energy in normal discharging. The control unit (4) performs control so as to execute waste discharging from the time after normal discharging has been executed to the time fuel is supplied to the combustion chamber.

This patent application discloses an electronic circuit (101) for controlling the spark of a spark plug (SP1) in a capacitor discharge ignition system (100) of an internal combustion engine. The electronic circuit (101) includes: an ignition coil (110) arranged to supply current to the spark plug (SP1); an ignition capacitor (C1) arranged to supply energy to a primary winding (L1); a voltage source (130) arranged to supply energy to at least one of the ignition capacitor (C1) and the primary winding (L1); a first switch (SW1) connected to a first primary terminal (TL1) and a first power supply terminal (TS1); a second switch (SW2) connected to a second capacitor terminal (TC2) and a second power supply terminal (TS2); and a third switch (SW3) connected to the second capacitor terminal (TC2) and the first power supply terminal (TS1). A capacitor discharge ignition system (100) including the above-mentioned electronic circuit (101) and an internal combustion engine including the capacitor discharge ignition system (100) are also disclosed.

A method (100) for limiting the rotational speed of a crankshaft (3) of an internal combustion engine (10) of a handheld power tool (1). The internal combustion engine (10) includes an ignition device (7), an intake system (9), a throttle valve (11) in the intake system (9), and an electric actuator arrangement (13) configured to move the throttle valve (11) between an open position and a closed position. The method (100) includes a step (110) of retarding the ignition timing of the ignition device (7) from an initial ignition timing to a retarded ignition timing when the rotational speed of the crankshaft (3) exceeds an upper speed limit, and a step (120) of controlling the electric actuator arrangement (13) to move the throttle valve (11) toward the closed position. The present disclosure further relates to a control arrangement (21) and a handheld power tool (1).

The examples described here provide a method that includes calculating an engine speed, at least partially, based on a crankshaft angle sensor signal received by the engine's crankshaft angle sensor at periodic intervals defined by a crankshaft rotation. The method further includes calculating an engine acceleration, at least partially, based on the engine speed. The method also includes generating, using a filter, a filtered engine acceleration for the periodic intervals, at least partially based on the engine acceleration. Finally, the method includes calculating an RMS engine acceleration, at least partially, based on the filtered engine acceleration for the periodic intervals.The method further comprises detecting an engine misfire event, at least partially, based on the RMS engine acceleration. The method further comprises implementing a corrective action for the vehicle in response to the detection of the engine misfire event.

A temperature control system for a hot surface igniter, the system including: a power supply module, for supplying power to the control system; and further comprising: a storage module, which pre-stores a set target temperature; a collection module, for collecting and obtaining the current temperature of the hot surface igniter; a determination module, for determining whether the current temperature of the hot surface igniter matches the target temperature; a calculation module, for obtaining the temperature difference value between the target temperature and the current temperature by calculation using the current temperature when the current temperature does not match the target temperature, and obtaining a voltage control quantity according to the temperature difference value; and a control module, for automatically controlling an output voltage of the power supply module according to the obtained voltage control quantity until it is determined that the current temperature of the hot surface igniter matches the target temperature. The present disclosure can enable the hot surface igniter to obtain a suitable voltage to ensure that the hot surface igniter operates at a set target temperature, thereby realizing precise control over the operating temperature of the hot surface igniter, and increasing the service life of the hot surface igniter

The embodiment of the invention discloses an engine ignition angle calibration method and device, equipment and a storage medium, and the method comprises the steps that first state data of a target engine during operation at a first ignition angle are obtained, and the first state data comprise first knock intensity data and first angular acceleration data; determining whether the first state data meets a knock condition or not; under the condition that the first state data does not meet the knocking condition and a first torque value when the target engine operates at the previous ignition angle of the first ignition angle is smaller than a second torque value when the target engine operates at the first ignition angle, the first ignition angle is adjusted to obtain the next ignition angle of the first ignition angle, and determining the target ignition angle based on the first ignition angle until the state data when the target engine operates at the next ignition angle of the first ignition angle meets the knock condition or the second torque value is greater than or equal to the torque value when the target engine operates at the next ignition angle of the first ignition angle. The embodiment of the invention can ensure the calibration accuracy of the ignition angle.

The present disclosure relates to a method and a device for evaluating the compression of the cylinders of an internal combustion engine. The method for evaluating the compression of the cylinders of an internal-combustion engine of a vehicle having an electric starter motor and respective starting battery, comprising: start capturing the battery voltage signal when the starter motor stars to rotate the internal-combustion engine so as to initiate operation of the engine under its own power; cease capturing the battery voltage signal when the engine enters operation under its own power; process the captured voltage signal for the location of local minimums; calculate the time difference between consecutive local minimums; detect if there is a variation of time between the calculated differences higher than a predetermined threshold between any said calculated time differences; if there is such variation, signal a potential engine malfunction.

The utility model discloses a double-layer insulating ceramic ignition electrode structure in the technical field of ceramic igniters, which comprises a ceramic igniter, one end of the ceramic igniter is fixedly provided with a first insulating ceramic mechanism, and the other end of the ceramic igniter is fixedly provided with a second insulating ceramic mechanism; the first insulating ceramic mechanism comprises a ceramic shell fixed to the ceramic igniter, a plurality of limiting balls are movably arranged at the upper end of the ceramic shell, a pushing ring is movably installed in the upper end of the ceramic shell, a holding ring is fixedly arranged at one end of the pushing ring, and a reset spring is fixedly connected to one side of the holding ring. A positioning ring is fixedly arranged at the other end of the reset spring; the ceramic igniter is installed through the first insulation ceramic mechanism, insulation protection is carried out on the electrode column, the second insulation ceramic mechanism is arranged at the tail end of the ceramic igniter and used for carrying out insulation protection on the wiring end, and the use safety of the ceramic igniter is kept.

Electronic control unit, which includes: a load driver circuit (102) that controls a load a control circuit (104) that controls the load driver circuit (102); and a diagnostic circuit (103) that diagnoses an output state of the load driver circuit (102) and outputs a diagnostic result to the control circuit (104), wherein the diagnostic circuit (103) outputs a diagnostic completion flag to the control circuit (104) indicating whether a diagnostic option is available.

A vehicle, comprising an engine. The engine comprises an engine body (100), a fuel injection system, pistons (104), and spark plugs (110). Air cylinders (101) are formed in the engine body (100). The pistons (104) are slidably arranged in the air cylinders (101), the pistons (104) defining combustion chambers (102) within the air cylinders (101). The fuel injection system is connected to the combustion chambers (102) and is used for injecting fuel into the combustion chambers (102). The engine has a first running state and a second running state. During the first running state, the spark plugs (110) ignite the fuel to heat the combustion chambers (102) by means of the heat from the fuel, so that the combustion chambers (102) may reach a set temperature during the compression stroke period, the set temperature being higher than the auto-ignition temperature of the fuel; during the second running state, the fuel injection system injects the fuel into the combustion chambers (102), so that the fuel can be heated and auto-ignite within the combustion chambers.

The examples described here provide a method that includes calculating an engine speed, at least partially, based on a crankshaft angle sensor signal received by the engine's crankshaft angle sensor at periodic intervals defined by a crankshaft rotation. The method further includes calculating an engine acceleration, at least partially, based on the engine speed. The method also includes generating, using a filter, a filtered engine acceleration for the periodic intervals, at least partially based on the engine acceleration. Finally, the method includes calculating an RMS engine acceleration, at least partially, based on the filtered engine acceleration for the periodic intervals.The method further comprises detecting an engine misfire event, at least partially, based on the RMS engine acceleration. The method further comprises implementing a corrective action for the vehicle in response to the detection of the engine misfire event.

The invention provides a gas engine explosion-proof ignition system and an engine, relates to the field of engines, and aims to solve the problem that in the prior art, a conventional spark plug extension structure lacks a strict explosion-proof main body design, so that electric arc leakage is likely to happen, and safety accidents are caused. The explosion-proof rod provides an explosion-proof channel which is completely isolated from the external environment for the high-voltage wire, and an arc leakage path is blocked; meanwhile, the fixing part of the adapter plate serves as a sealing base plate to be clamped and fastened between the upper cover flange and the air cylinder cover upper cover, the ignition coil is directly borne through the integrally-extending supporting part while axial pressing sealing and radial positioning of the anti-explosion rod are completed, anti-explosion isolation, mechanical sealing fixing and coil supporting are integrated into a rigid whole, and the anti-explosion isolation effect is achieved. The anti-explosion safety requirement is met, the overall rigidity and coaxiality of the connecting structure are improved, and high-frequency strong vibration of an engine is effectively resisted.

The application provides an engine reverse rotation judgment and suppression method, system, electronic equipment and storage medium. The engine reverse rotation judgment and suppression method first numbers each tooth in a square wave signal of a crankshaft. Then, a current rotating speed of the engine is acquired, and at least one instantaneous speed drop rate of each cylinder is acquired when the current rotating speed is less than a preset reverse rotation speed threshold. A reverse rotation judgment result of the current engine is given according to the instantaneous speed drop rate of each cylinder and a preset judgment threshold. If the reverse rotation judgment result is reverse rotation judgment success, the magnetization state of an ignition coil of the cylinder is adjusted. The engine reverse rotation judgment and suppression method can effectively suppress the impact force caused by ignition during reverse rotation and protect the engine structure.

This ignition device is provided with: an ignition coil (2) having a primary coil (21) connected to a power supply (B) and a secondary coil (22) that generates a high voltage as the primary coil (21) is energized; an ignition plug (3) having a center electrode (31) connected to the secondary coil (22) and a ground electrode (32) facing the center electrode (31) with a discharge gap (4) therebetween; and a parallel circuit (5) having a diode (51) that regulates the direction of current flow between the secondary coil (22) and the center electrode (31) and a resistor (52) electrically connected in parallel to the diode (51), wherein a resistance value R (unit: MΩ) of the resistor (52) and a gap value G (unit: mm) of the discharge gap (4) satisfy the relationship of formula 1.　Formula 1: 13.69 × 10X ≤ R ≤ 16.17 × 10Y, where X = −2.75 × G and Y = 1.72 × G.