Abstract:
A device for detecting and monitoring crank shaft rotary speed and position in a four stroke engine, wherein a first and a second sensor (3, 4) are arranged to sense passage of reference marks (9, 9') on a rotatable element or elements (1, 1'). The first sensor (3) is a high precision sensor which is arranged to sense passage of reference marks (9) on a crank shaft flywheel (1) of the engine, and the second sensor (4) is a low speed sensor which is arranged to sense passage of reference marks (9, 9') on the crank shaft flywheel (1) or reference marks or a wheel (1') being associated with a cam shaft of the engine. The invention also concerns a method and a vehicle.
Abstract:
Method to monitor an operating characteristic in a combustion engine, wherein a monitoring matrix divided into a number of sections for storage of information is created, wherein each section is associated with specific intervals of engine speed ω and torque requested from the engine T 1 . When the engine is used during an operational time window with a determined duration, an operating characteristic is measured or estimated and associated with the monitoring matrix's respective section, associated with the current engine speed and the torque requested. For each section in the monitoring matrix at least one statistical parameter is calculated, describing said operating characteristic associated with this section during the current operational time window. The statistical parameter(s) are stored in the respective section. At the end of the operational time window, information is stored in the monitoring matrix in an individual storage matrix associated with said operational time window, wherein the monitoring matrix is emptied of information.
Abstract:
L'invention concerne un procédé de calibrage de l'offset d'un signal représentatif de la pression (P_brut) dans une chambre de combustion (2) d'un moteur thermique, un capteur (4) de pression cylindre étant disposé dans la chambre de combustion (2) et relié à une unité de calibrage (7) comprenant un moyen d'acquisition et des moyens de traitement du signal de pression (P_brut) et une mémoire. Ce procédé comprend une étape d'acquisition (40) et de mémorisation (400) du signal de pression (P_brut) issu du capteur (4) de pression cylindre; une première étape de traitement (41 ) du signal de pression (P_brut) en un signal filtré (P_filt) qui est mémorisé; une seconde étape de traitement du signal de pression (P_brut) pour obtenir un signal filtré de la valeur absolue de la dérivée du signal de pression (I P' brutl filt) qui est mémorisé; et une troisième étape de traitement (45) pour obtenir un signal de pression (P_corr) avec correction de l'offset.
Abstract:
Die Erfindung bezieht sich auf eine Vorrichtung zur elektrischen Verbindung eines Sensorelementes, welches in einer Motoranbaukomponente (10) aufgenommen ist mit einer Auswerteelektronik (32). Die Motoranbaukomponente (10) und die Auswerteelektronik (32) sind über Kontaktierungsleitungen (34) elektrisch miteinander verbunden. Die Auswerteelektronik (32) ist in einem schwenkbaren Teil (30) eines Hybridhalters (20) aufgenommen, der relativ zu einem an der Motoranbaukomponente (10) befestigten Teil des Hybridhalters (20) bewegbar ist.
Abstract:
A method and system of controlling auto-ignition timing in an internal combustion engine cylinder in which the timing of auto-ignition in prechambers (20a, 20b) that are coupled to the cylinder (10) is precisely controlled. The auto-ignition in the prechambers (20a, 20b) is produced by a compression stroke using pistons (23a, 23b) situated within the prechambers (20a, 20b). Hot gas jets produced by the prechamber auto-ignitions are introduced into the charge space of the cylinder and rapidly induce a second auto-ignition of the mixture in the cylinder. By precisely controlling the timing of the auto-ignitions within the prechambers, the timing of the auto-ignition within the cylinders can, in turn, be precisely controlled.
Abstract:
A device and method for controlling the flow of a gaseous fuel from a fuel supply to a pressurized combustion chamber. A fuel pump is included in the gas train from supply to chamber. The fuel pump increases the pressure of the gas to allow efficient injection into the chamber. The pump is modulated to control the fuel flow. Both alternating current and pulse-width-modulated direct current signals may be used to control the flow. The pump may be a piston pump or a diaphragm pump. Feedback may be provided from sensors that determine operating parameters of the engine and such sensor signals may be used by the controller to maintain a parameter, such as temperature, at a specified value. An acoustic filter can be included in the gas train to significantly reduce gas flow pulsations generated by the pump. This filter improves the uniformity of the combustion process.
Abstract:
A cylinder head compression sensor gasket assembly includes a gasket body having a sealing portion configured to be clamped between an engine block and a cylinder head. The sealing portion has a plurality of through openings configured to register with separate cylinder bore in the engine block wherein the sealing portion establishes a gas-tight seal about the through passages. A plurality of pressure sensor assemblies are attached in sealed engagement with the gasket body with at least one of the pressure sensor assemblies being configured to sense pressure within a separate one of the through openings. An electrical connector is supported on the gasket body radially outwardly from the sealing portion. The electrical connector is configured in electrical communication with each of the pressure sensor assemblies. Accordingly, the electrical connector is accessible without having to disassemble the gasket body from being clamped between the cylinder head and the engine block.
Abstract:
A cylinder head compression sensor gasket assembly includes a gasket body having a sealing portion configured to be clamped between an engine block and a cylinder head. The sealing portion has a plurality of through openings configured to register with separate cylinder bore in the engine block wherein the sealing portion establishes a gas-tight seal about the through passages. A plurality of pressure sensor assemblies are attached in sealed engagement with the gasket body with at least one of the pressure sensor assemblies being configured to sense pressure within a separate one of the through openings. An electrical connector is supported on the gasket body radially outwardly from the sealing portion. The electrical connector is configured in electrical communication with each of the pressure sensor assemblies. Accordingly, the electrical connector is accessible without having to disassemble the gasket body from being clamped between the cylinder head and the engine block.