Patent application number | Description | Published |
20080319631 | METHOD AND DEVICE FOR OPERATION OF THE GLOW PLUGS OF A DIESEL ENGINE - A method and device for operation of glow plugs of a Diesel engine in which the type of glow plugs used is determined, by a parameter typical of the glow plugs, for example, the electrical glow plug resistance, being detected and evaluated. The detected values of the parameter typical of the glow plugs are compared with corresponding data for various types of glow plugs stored in the glow controller to determine the type(s) of glow plug(s) in the engine. After identification of the type(s) of glow plug(s), stored sets of parameters, which correspond to the type(s) of glow plug(s) determined, are likewise called upon to control the glow plugs. | 12-25-2008 |
20090008378 | Method for heating up of a ceramic glow plug and glow plug control unit - Herein is described a method for the heating-up of a ceramic glow plug by applying a variable electric voltage to the glow plug. In accordance with the invention it is provided that, starting from a base value, the electric voltage increases in a time-averaged manner superproportional to the elapsed heating-up time. The invention relates also to a glow plug control unit for carrying out of such a method. | 01-08-2009 |
20090316328 | Method for Controlling a Glow Plug in a Diesel Engine - A method for controlling a glow plug in a diesel engine, in particular in the preheating phase, is described. According to the invention, it is provided that the time gradient of an electrical variable which varies according to the temperature of the glow plug is measured and compared with a threshold value, and when said time gradient exceeds or drops below the threshold value, the electric supply voltage of the glow plug is changed. | 12-24-2009 |
20100094523 | Method for Operating a Group of Glow Plugs in a Diesel Engine - Method for controlling a group of glow plugs in a diesel engine, which are connected with a direct current source via individual supply lines and which are to be controlled by a pulse width modulation process at the same temperature, at least in time average. The electric resistance of the glow plugs, less the resistance of the supply line to the heating element of the glow plugs, is determined during operation of the engine and a relative pulse width at which the glow plugs are to be operated is calculated from the value so obtained. | 04-15-2010 |
20110015848 | Method for operating a glow plug - The invention relates to a method for operating a glow plug with running engine, with the engine having a crankshaft and at least one cylinder. An effective voltage is generated from a vehicle electrical system voltage, with the effective voltage being applied to the glow plug. A plurality of measurement values of the combustion chamber pressure prevalent in the cylinder is measured during each working cycle of the cylinder, with the angular position of the crankshaft being determined for each individual measurement value. A characteristic value of the combustion process is determined from the evolution of the combustion chamber pressure measured in relation to the angular position of the crankshaft, and the determined characteristic value is compared with a setpoint value, and the effective voltage is set to a minimum value required for reaching the setpoint value. | 01-20-2011 |
20110220073 | METHOD FOR CONTROLLING A GLOW PLUG - The invention relates to a method for controlling a glow plug to a target value of the surface temperature while the engine is running, wherein an effective voltage is generated by pulse width modulation of a vehicle electrical system voltage and this effective voltage is applied to the glow plug, the electric resistance of the glow plug is measured and compared to a resistance value expected for the target value of the surface temperature, and the effective voltage is varied as a function of the deviation of the measured value of the electric resistance from the expected value of the electric resistance. According to the invention, a pressure sensor of the glow plug is used to measure the combustion chamber pressure and the resistance value expected for the target value of the surface temperature is determined as a function of the combustion chamber pressure. | 09-15-2011 |
20130199508 | METHOD FOR CONTROLLING THE IGNITION POINT IN AN INTERNAL COMBUSTION ENGINE BY MEANS OF A CORONA DISCHARGE - A method for controlling the ignition point of a fuel/air mixture in an internal combustion engine by at least one corona discharge starting from an electrode, wherein at least one of the corona discharges is ignited at a crankshaft angle between 400° and 200° before the top dead center, with which the power stroke starts, by applying an ignition voltage to the electrode(s), and the energy input of the corona discharge or of the corona discharges is controlled by adapting the burn time of the corona discharge and the strength of the ignition voltage. The fuel/air mixture ignites at a crankshaft angle between 30° and 5° before the top dead center, with which the power stroke starts, and 50% of the fuel of the fuel/air mixture is combusted at a crankshaft angle between 6° and 10° after the top dead center point, with which the power stroke starts. | 08-08-2013 |