Abstract: An ignition coil assembly for installation in a spark plug well of a combustion engine and for enabling a spark of a spark plug installed in a distal end of the spark plug well. The ignition coil assembly includes an ignition coil dimensioned and configured to transform a first voltage to a second voltage for enabling the spark, and an elongated connection portion extending in the spark plug well when the ignition coil assembly is installed in the spark plug well.

Abstract: A tubular structure (100) adapted to connect a valve cover (200) of an internal combustion engine (300) to a portion (310) of the internal combustion engine (300) is disclosed. The portion (310) encircles a spark plug connection interface (320). The tubular structure (100) is adapted to protect an ignition coil (400) from oil for lubrication of parts coverable by the valve cover (200). The ignition coil (400) is mountable at least partly within the tubular structure (100), whereby the tubular structure (100) is capable of forming part of a magnetic shield for shielding the ignition coil (400). The tubular structure (100) comprises a soft magnetic material and wherein at least a portion (106) of the tubular structure (100) has a relative permeability greater than 10 and a resistivity greater than 0.3 ??m.

Abstract: A battery assembly and a control unit for aiming at outputting a target voltage during charging or discharging and a method, a battery assembly and a control unit for maintaining a target voltage of a battery assembly during charging or discharging are disclosed. The battery assembly (100) comprises a first battery module (110) configured to receive a first signal representing a first voltage to be output over the first battery module (110), wherein the first signal is configurable to represent a range of voltages capable of being output over the first battery module (110). Moreover, the battery assembly (100) comprises a plurality of second battery modules (160-180). Each second battery module (160, 170, 180) of the plurality of second battery modules (160-180) is configured to receive a respective second signal, representing a respective configuration, which indicates whether said each second battery module (160, 170, 180) is to be switched-on or bypassed.

Abstract: A battery module (2) and a battery pack (100) are disclosed. The battery module (2) comprises a control circuit (1), a first node (3) and a second node (4) for charging and/or discharging, and at least two first branches (71-7M). Each first branch (71-7M) comprises a respective plurality of battery cells (C11-CN1, . . . , C1M-CNM) of the battery cells (C11-CNM), a respective first branch over-current protecting component (F11-F1M), and a respective first switch (Q11-Q1M). The battery module (2) comprises one or more second branches (81-8M) having one or more second switches (Q21-Q2M). Each second branch (81-8M) comprises a respective second switch (Q21-Q2M). The control circuit (1) is provided with a number of connection lines (V1-VN) corresponding to at least a first count of the respective plurality of battery cells (C11-CN1, . . . , C1M-CNM). Each connection line (V1-VN) is arranged to parallelly connect a respective set (C11-C1M, C21-C2M, . . .

Abstract: A battery module (2) and a battery pack (100) are disclosed. The battery module (2) comprises a control circuit (1), a first node (3) and a second node (4) for charging and/or discharging, at least two first branches (71-7M). Each first branch (71-7M) comprises a respective plurality of battery cells (C11-CN1, . . . , C1M-CNM) of the battery cells (C11-CNM), and a respective first switch (Q11-Q1M). The battery module (2) comprises one or more second branches (81-8M) having respective second switches (Q21-Q2M). The control circuit (1) is provided with a number of connection lines (V1-VN). Each connection line (V1-VN) is arranged to parallelly connect a respective set (C11-C1M, C21-C2M, . . . , CN1-CNM) of corresponding battery cells (C11-CNM) to each other via a respective controllable over-current protecting component (S11-S1M, . . . , SN1-SNM). Said each corresponding battery cell (C11-CNM) is comprised in a respective first branch (71-7M) of said at least two first branches (71-7M).

Abstract: The invention relates to an improved ignition system for spark ignited combustion engines. According to the invention the voltage over a coil winding 6P on the primary side of the ignition coil is regulated to a sufficiently low voltage level during timed periods of the ignition cycle, such that at least one function out of three in total, i.e. prevention of premature spark-on-make, or spark suppression after onset of ignition, or improved frequency response between primary and secondary side of the ignition coil after end of ignition, is obtained. When applied in an inductive ignition system a differential amplifier (8) may be connected over the primary winding 6P regulating a control switch 2CS via a drive unit (9). The invention is preferably implemented in ignition systems with ion sense circuitry 5C,5R on the secondary side of the ignition coil, and implementing all three functions.

Abstract: An electronic circuit (101) for controlling a spark of a spark plug (SP1) in a capacitor discharge ignition system (100) for a combustion engine. The electronic circuit (101) comprises an ignition coil (110) dimensioned and configured to provide current to the spark plug (SP1), an ignition capacitor (C1) dimensioned and configured to supply energy to the primary winding (L1), an voltage source (130) dimensioned and configured to supply energy to at least one of the ignition capacitor (C1) and the primary winding (L1), a first switch (SW1) connected to the first primary terminal (TL1) and the first source terminal (TS1), a second switch (SW2) connected to the second capacitor terminal (TC2) and the second source terminal (TS2), and a third switch (SW3) connected to the second capacitor terminal (TC2) and the first source terminal (TS1). A capacitor discharge ignition system (100) including the electronic circuit (101) and a combustion engine including the capacitor discharge ignition system (100).

Abstract: A magneto ignition system for battery less hand-held combustion engines includes a claw generator with a stationary circular power coil winding enclosed by two iron claw halves and with a rotating flywheel magnet ring with multiple magnetic poles. The stationary circular coil winding includes a trigger coil with a stationary coil winding arranged in a plane orthogonal to the stationary circular power coil winding. The magneto ignition system further includes an engine control module ECM for establishment of appropriate ignition timing, and an ignition coil module ICM. The stationary circular power coil winding may provide the electrical power supply to both the ignition timing module ECM and the ignition coil module ICM.

Abstract: The present invention relates to a spark plug extension body connecting an ignition coil with a spark plug for a spark ignited internal combustion engine, as well as a method for providing such a spark plug extension body for reduction of partial electrical discharges in the spark plug extension body. In conventional spark plug extensions are coil springs used as electrical conductor against the spark plug terminal and/or ignition coil terminal. These coil springs cause Corona effects and short circuiting requiring replacement of the spark plug extension. With the invention the entire electrical conductor (CRu, 64, CRL) is in a rod like form and at least both ends (CRu, CRL) of the electrical conductor (CRu, 64, CRL) are made as a monolith in a flexible and electrically conducting polymeric material, preferably electrically conducting rubber.

Abstract: The invention relates to an improved ignition system for spark ignited combustion engines. According to the invention the voltage over a coil winding 6P on the primary side of the ignition coil is regulated to a sufficiently low voltage level during timed periods of the ignition cycle, such that at least one function out of three in total, i.e. prevention of premature spark-on-make, or spark suppression after onset of ignition, or improved frequency response between primary and secondary side of the ignition coil after end of ignition, is obtained. When applied in an inductive ignition system a differential amplifier (8) may be connected over the primary winding 6P regulating a control switch 2CS via a drive unit (9). The invention is preferably implemented in ignition systems with ion sense circuitry 5C,5R on the secondary side of the ignition coil, and implementing all three functions.

Abstract: A method for extracting characterizing features from an ion current trace retrieved from spark plugs of cylinders of an internal combustion engine, comprises the steps of: i. dividing the ion current signal into crank angle subintervals; 5 ii. calculating a measure of ion current in each crank angle subinterval; and iii. Performing a calculation on the measure of ion currents from different subintervals such that the result of the calculation is dimension free. Further it relates to a method of monitoring combustion processes where a plurality of ion current signals from a number of spark plugs (4A, 4B) are 10 retrieved and used in combination.

Abstract: The invention relates to an inductive position sensor, comprising: a first part with a cylindrical coil winding (14) having a longitudinal direction, a second part with a soft magnetic plunger core (20). The invention also relates to the soft magnetic plunger core and a magnetic shield around said cylindrical coil winding for said inductive position sensor. According to the invention is the soft magnetic plunger core as well as the magnetic shield hollow, preferably with circular cross-section, and made from electrical steel or soft iron sheet material.

Abstract: A method for extracting characterizing features from an ion current trace retrieved from spark plugs of cylinders of an internal combustion engine, comprises the steps of: i. dividing the ion current signal into crank angle subintervals; 5 ii. calculating a measure of ion current in each crank angle subinterval; and iii. Performing a calculation on the measure of ion currents from different subintervals such that the result of the calculation is dimension free. Further it relates to a method of monitoring combustion processes where a plurality of ion current signals from a number of spark plugs (4A, 4B) are 10 retrieved and used in combination.

Abstract: A method for extracting characterizing features from an ion current trace retrieved from spark plugs of cylinders of an internal combustion engine, comprises the steps of: i. dividing the ion current signal into crank angle subintervals; ii. calculating a measure of ion current in each crank angle subinterval; and iii. Performing a calculation on the measure of ion currents from different subintervals such that the result of the calculation is dimension free. Further it relates to a method of monitoring combustion processes where a plurality of ion current signals from a number of spark plugs (4A, 4B) are retrieved and used in combination.

Abstract: The following invention relates to an ignition coil assembly for an ignition system comprising an ignition coil where said assembly has a main axis and is configured for insertion into and/or removal out of a well associated with an internal combustion engine, wherein the assembly comprises an elongated extension body made of flexible material, said extension body comprising an upper end portion and a lower end portion wherein the extension body is arranged to be transversally bendable in relation to the main axis so that the upper end portion and the lower end portion may assume an angle (?) in relation to each other.

Abstract: A computer-implemented platform may comprise hardware and software configured to manage an engine using knock intensity data. Knock intensities from a plurality of combustion cycles may be used to estimate a statistical distribution of knock intensities. The distribution of knock intensities may be used to determine a Descriptive Statistic, which may represent a state of tune of the engine. A calculated Descriptive Statistic may be compared to a desired Descriptive Statistic (e.g., that is representative of operation during a desired tune state of the engine). A deviation between the calculated and desired knock intensity distributions (e.g., between the calculated DS and desired DS) may be used to adjust a control parameter of the engine. Adjustment may be engine-wide. Adjustment may be cylinder-by-cylinder.

Abstract: The present invention relates to a method for controlling the performance of an engine, comprising the steps detecting an ion current in the form of a first signal analysing said first signal to determine at least one property determining a knock index based on said first signal and preferably on said at least one property combining said knock index with a plurality of factors related to properties of the engine or the operation of the engine to arrive at a engine index, and comparing said engine index with a sensitivity map of the engine to determine a correction required to improve the operation of the engine, and correcting the operation of the engine in accordance with the correction determined. The invention also relates to a system for controlling the performance of an engine.

Abstract: This invention relates to an engine for a vehicle using alternative fuel, preferably gas, comprising an engine (5) having a spark ignited ignition system (2) wherein said ignition system (2) includes misfire detection by means of a sensor device (4) providing information to a control system (20), connected to or within said ignition system (2), and wherein said combustion includes diluted operation to optimize emissions wherein said sensor device (4) includes an ion sensing measurement means (40) arranged to measure an ion current in said engine (5) and that said ignition system (2) has a built-in function to detect misfiring through an analysis of the ion current of the engine (5) during combustion.

Abstract: A method for extracting characterizing features from an ion current trace retrieved from spark plugs of cylinders of an internal combustion engine, comprises the steps of: i. dividing the ion current signal into crank angle subintervals; ii. calculating a measure of ion current in each crank angle subinterval; and iii. Performing a calculation on the measure of ion currents from different subintervals such that the result of the calculation is dimension free. Further it relates to a method of monitoring combustion processes where a plurality of ion current signals from a number of spark plugs (4A, 4B) are retrieved and used in combination.

Abstract: A method for extracting characterizing features from an ion current trace retrieved from spark plugs of cylinders of an internal combustion engine, comprises the steps of: i. dividing the ion current signal into crank angle subintervals; ii. calculating a measure of ion current in each crank angle subinterval; and iii. Performing a calculation on the measure of ion currents from different subintervals such that the result of the calculation is dimension free. Further it relates to a method of monitoring combustion processes where a plurality of ion current signals from a number of spark plugs (4A, 4B) are retrieved and used in combination.