17results about "Other installations" patented technology

To suppress waste of electric power by making energizing time to an ignition coil appropriate.SOLUTION: A reference energization time is determined based on a voltage of a power supply and a rotation speed. On the basis of a condition related to the combustion state of the internal combustion engine, it is determined whether the combustion state of the internal combustion engine is in a relatively stable first operation state or in a relatively unstable second operation state. To judge whether an actual combustion state is good or bad by detecting the actual combustion state of an internal combustion engine. When it is determined that the combustion state is good in the first operation state (time t1), the energization time is largely reduced and corrected from the reference energization time to a predetermined level, and thereafter, when it is determined that the actual combustion state is bad, the energization time is gradually corrected to be longer by a minute amount (time t2, t3). In the second operation state, when it is determined that the combustion state is good, the energization time is corrected to be gradually shortened by a minute amount from the reference energization time.SELECTED DRAWING: Figure 3

To improve detection accuracy of preignition in a spark ignition engine.SOLUTION: A processor 31 of an ECU 30 detects occurrence of pre-ignition in a spark ignition engine that ignites a mixture in a combustion chamber 13 by spark discharge through a process of calculating a rotational fluctuation amount and self-ignition start timing of the engine 10 and a process of determining that pre-ignition has occurred when the rotational fluctuation amount is equal to or larger than a predetermined threshold value and the self-ignition start timing is earlier than predetermined timing. The self-ignition start timing is the timing when the temperature of the mixture in the combustion chamber 13 during a compression stroke reaches the ignition point of the mixture.SELECTED DRAWING: Figure 1

The purpose of the present invention is to improve the accuracy of control parameters for controlling a control target. This control device is provided with an explanatory variable setting unit, a Mahalanobis distance calculation unit, and a control parameter setting unit. The explanatory variable setting unit sets explanatory variables on the basis of time-series data indicating the status or state of a control target. The Mahalanobis distance calculation unit calculates a Mahalanobis distance on the basis of the explanatory variables. The control parameter setting unit sets control parameters for causing the control target to perform an operation according to the Mahalanobis distance.

A method for controlling an ignition coil for a spark plug of an internal combustion engine, wherein the ignition coil is associated with a respective engine cylinder in which combustion is to occur, wherein the ignition coil is driven by a spark demand pulse. The method comprises determining a spark demand pulse by determining an end time point of the spark demand pulse, determining a spark demand pulse length based on a historic battery voltage profile of the associated battery voltage, determining a start time point of the spark demand pulse based on the determined end time point and the determined spark demand pulse length, driving the ignition coil with the determined spark demand pulse. A benefit of the invention is that a spark demand pulse is generated that is more appropriate for the prevailing battery voltage at the time the demand pulse is generated. Therefore, the process provides a more reliable approach for controlling the generation of spark at a spark plug as controlled by an ignition coil under conditions where the battery voltage may be compromised, for example for an aged battery and / or during cold engine conditions.

An event detection system (200) for determining occurrence of an event in an internal combustion engine (201) is disclosed, comprising: an ion current measurement circuit (107), a predetermined number of band limiter modules (203), a predetermined number of frequency domain conversion units (204), and an ion signal analyzer (206). The band limiter modules (203) generate band filtered ion current signals from received ion current signals generated during a spark event in a spark plug (106). The frequency domain conversion units (204) convert the band filtered ion current signals to a frequency domain to obtain digital ion current signals. The ion analyzer analyzes an amplitude of each of the digital ion current signals with an amplitude threshold of each of the digital ion current signals to determine occurrence of the event in the engine. Misfire detection ensures that the vehicle complies with OBD II regulatory specifications implemented by regulatory agencies.

An engine ignition system (100) can include a multifunction controller (101), and an exciter (103) operatively connected to the multifunction controller (101). The multifunction controller (101) can be configured to control the exciter (103) to output an ignition voltage. The multifunction controller (101) can be configured to perform at least one other engine control function.

Provided is an igniter that can reduce the occurrence of malfunction due to noise.　This igniter (100) comprises: a switch element (111) having a first end; a temperature sensor (112) including at least one diode and having a cathode end (112B); a switch element control device (12) that controls the switch element; and a switch element electrode (Pe) connected to the first end and the cathode end of the switch element, wherein the switch element control device has a ground electrode (Pgnd) electrically isolated from the cathode end.

To provide an ignition device capable of suppressing the unintended electric discharge due to ON-time voltage.SOLUTION: By switching a switching element 30 from OFF to ON at an ON time as a time when a pressure in a cylinder 91 is on the rise, an ignition device 1 starts to electrify a primary coil 21. A control part 60 sets the ON time to be later as the power supply voltage of a battery 10 gets higher. Then, on the basis of the power supply voltage and the pressure in the cylinder 91 at the ON time, it selects the power supply voltage for which it is determined that the electric discharge due to the ON-time voltage is hardly caused in a spark plug 50. This suppresses unintended electric discharge due to the ON-time voltage.SELECTED DRAWING: Figure 1

A method for controlling an ignition unit for a spark plug of an internal combustion engine is provided. The ignition unit is driven by a spark demand pulse that is defined by start time point and an end time point. A voltage level of an associated engine battery at a time proximate to the start time point of the spark demand pulse is determined, and then an adjustment amount based on the determined voltage level is determined. The end time point of the determined demand pulse is adjusted by the determined adjustment amount. A benefit of the invention is that a spark demand pulse is generated that is more appropriate for the prevailing battery voltage at the time the demand pulse is generated. Therefore, the process provides a more reliable approach for controlling the generation of spark at a spark plug as controlled by an ignition unit under conditions where the battery voltage may be compromised, for example for an aged battery and / or during cold engine conditions. There is also provided an engine system having a control unit configured to implement the method, a control unit comprising a processor to carry out the method, and a computer program product embodying the method.

The invention relates to ignition coil dwell control. A method for controlling dwell time in an ignition system of an internal combustion engine is provided. In one example, a method includes adjusting dwell based on engine operating conditions, and further adjusting dwell in a manner proportional to existing spark plug condition. By continuously evaluating spark plug condition during operation of the internal combustion engine, premature wear of the spark plug can be prevented, resulting in an extended service life of the spark plug and other ignition system components.

In certain embodiments, a significant improvement in H2-ICE performance can be achieved by a combination of active scavenging pre-combustion chamber technology and predictive model-based spark control to overcome the drawbacks of known combustion technologies. In certain embodiments, advanced combustion modeling and simulation of the ignition process, including spark events, arc movement and elongation, and resulting flame propagation, can be used to predict the relationship between spark energy / output, flow within the electrode gap, and flame growth (SOC) for different engines, different spark plugs, and various conditions. This information can be used to adjust the spark energy / output characteristics during the spark event of the same cycle in order to minimize SOC variations and significantly reduce the tendency of combustion anomalies such as backfire, knocking, and pre-ignition that prevent the achievement of high engine output density and efficiency.

An ignition coil protection control method, comprising: measuring the temperature of an ignition module; if the temperature of the ignition module is greater than or equal to a first set temperature value, reducing the charging duration of an ignition coil until the temperature of the ignition module is less than the first set temperature value; and if the temperature of the ignition module is less than the first set temperature value, determining the charging duration of the ignition coil on the basis of an engine speed, the value of direct current voltage, and a preset mapping relationship. Also disclosed are a storage medium, an engine ignition system, and a vehicle.

A pre-chamber ignition apparatus for an internal combustion engine comprising an apparatus body associable with the cylinder head of an internal combustion engine for communicating with a combustion chamber of the cylinder head through at least one connection hole, a microwave ignition device for generating microwaves to cause ignition of an air / fuel mixture in a pre-chamber formed within the apparatus body. The apparatus body comprises an upstream portion configured to allow the housing and fixing of the microwave ignition device and a hollow downstream or head portion, delimiting the pre-chamber, in fluid communication with the combustion chamber. The downstream portion is provided with at least one connection hole. The hollow downstream portion includes a reflection wall opposite the microwave ignition device and shaped to receive and concentrate microwaves generated by the microwave ignition device and / or a resonance cavity for the mixture contained in the pre-chamber thereby amplifying the combustion in the pre-chamber.

To enable an engine to perform the fundamental thermal efficiency and performance of the engine quickly and sufficiently when changing an operating state during an operation mode to travel on engine drive force.SOLUTION: In a hybrid vehicle having an engine 10 for supplying drive force for travel and rotary electric machines 30, 40 for supplying drive force for travel, the engine 10 is an auxiliary chamber-type engine, and includes, as transition control when changing an operation state from a first operating point to a second operating point during an operation mode to travel on drive force of the engine 10: a firing stop step to stop ignition and fuel injection of the engine 10 while operating at the first operating point; a motoring step to reach the second operating point as target by drive force of the rotary electric machines 30, 40; and a firing start step to start firing on the engine 10 with an air volume and a fuel volume corresponding to the second operating point. Further, in the transition control, a fuel injection volume from a direct injection-type fuel injection device is decreased than in starting the engine.SELECTED DRAWING: Figure 1

An ignition system for an engine of a vehicle, an engine and a method for controlling combustion in a lean burn engine are disclosed. The ignition system comprises: a spark plug comprising: a ground electrode and a center electrode electrically connected to an ignition coil, wherein the spark plug ignites a mixture of fuel and air in a normal mode of the engine; a high speed pulse generator for igniting the mixture of fuel and air in a lean burn mode of the engine; a pulse generator controller for controlling the high speed pulse generator to ignite the mixture of fuel and air in the lean burn mode of the engine; an engine control unit determines the normal mode and the lean burn mode based on an engine speed and an engine load, and controls the ignition of the pulse generator controller and the spark plug based on the determined mode in the normal mode and the lean burn mode.