Patent application number | Description | Published |
20090183718 | GLOW PLUG CONTROL UNIT AND METHOD FOR CONTROLLING THE TEMPERATURE IN A GLOW PLUG - A glow plug control unit is provided that comprises a first switch for connecting power supply lines to a glow plug. The glow plug control unit further comprises a voltage measurement unit for measuring the voltage at the power supply lines. A current measurement unit is built for measuring the current through the first switch and a control circuit is built for controlling the first switch and, in a current control mode, for regulating the current through the first switch. | 07-23-2009 |
20090289051 | METHOD FOR CONTROLLING THE OPERATION OF A GLOW-PLUG IN A DIESEL ENGINE - A method is provided that includes, but is not limited to estimating the temperature (TGP,est) of the glow-plug (GP) in accordance with a first model of the glow-plug (GP) as a function of the detected values of the glow-plug voltage and current (VGP, IGP) and the sensed values of some input variables, such as the engine speed (ωE) and the engine temperature (TE), determining, in accordance with a second predetermined model of the glow-plug (GP), a desired value of the voltage (VGP,des) or power (PGP,des) to be supplied to the glow-plug (GP), as a function of a desired value of the glow-plug temperature (TGP,des), the estimated glow-plug temperature (TGP,est), and the sensed values of the input variables, and varying the duty-cycle of a pulse-width-modulated voltage (VPWM) applied to the glow-plug (GP), as a function of the calculated value of said desired voltage (VGP,des) or power (PGP,des). | 11-26-2009 |
20110011383 | GLOW PLUG FOR A DIESEL ENGINE - A method for using a glow plug in a diesel engine includes, but is not limited to a first step of providing an electrical energy source for supplying an electrical current through the glow plug, a second step of measuring the electrical current, a third step of calculating a voltage across the glow plug using a measured value of the electrical current, and a fourth step of controlling the electrical current through the glow plug using the calculated voltage. | 01-20-2011 |
20110041476 | METHOD FOR ESTIMATING OXYGEN CONCENTRATION DOWNSTREAM A DIESEL OXIDATION CATALYST - A method and a control system are provided for estimating oxygen concentration downstream a diesel oxidation catalyst within a diesel engine system. The method includes, but is not limited to at least an intake manifold, a combustion chamber, an exhaust manifold, and the diesel oxidation catalyst located in the exhaust line upstream a diesel particulate filter, the method comprising: determining unburned fuel mass flow ejected from the combustion chamber, determining air mass fraction in the exhaust manifold, estimating air mass fraction downstream the diesel oxidation catalyst as a function of said unburned fuel mass flow and said air mass fraction in the exhaust manifold, estimating oxygen concentration downstream the diesel oxidation catalyst as a function of the estimated air mass fraction downstream the diesel oxidation catalyst. | 02-24-2011 |
20110066354 | METHOD FOR REGENERATING A DIESEL PARTICULATE FILTER - A method is provided for regenerating a diesel particulate filter within a diesel engine system that includes, but is not limited to at least a combustion chamber defined by a reciprocating piston inside a cylinder, at least an exhaust valve for cyclically open the combustion chamber towards an exhaust line, and the diesel particulate filter located in the exhaust line, wherein the method comprises injecting an amount of fuel into the combustion chamber by means of least two consecutive after-injection pulses (AIP | 03-17-2011 |
20110118952 | GLOWPLUG TEMPERATURE CONTROL METHOD AND DEVICE FOR THE REDUCTION OF EMISSIONS FROM A DIESEL ENGINE - A method is provided for reducing emissions behind a catalytic converter in an exhaust gas stream of the engine. The method includes, but is not limited to controlling a power supply to a glowplug of a compression-ignition engine. The glowplug is activated if a set of at least two input values remains in a first characteristic region of an input parameter space for at least a predetermined activation time. The first characteristic region consists of one ore more contiguous regions of the input parameter space. | 05-19-2011 |
20110173952 | METHOD FOR OPERATING POST INJECTIONS OF FUEL IN AN INTERNAL COMBUSTION ENGINE - A method is provided for operating an engine. The engine is configured to post inject a quantity of fuel into a combustion chamber and includes, but is not limited to a Diesel Oxidation Catalyst (DOC) that has an inlet and an outlet. The method includes, but is not limited to determining an open loop post injection quantity q | 07-21-2011 |
20110185706 | METHOD FOR MANAGING THE REGENERATION OF A DIESEL PARTICULATE FILTER (DPF) IN A DIESEL ENGINE SYSTEM - A method is provided for managing the regeneration of a Diesel Particulate Filter (DPF) in a Diesel engine system. The engine having an intake and an exhaust line and being configured to after-inject or post-inject quantities of fuel into a combustion chamber for raising the temperature of the engine exhaust gas. The engine including in the exhaust line, but not limited to, a Diesel Particulate Filter (DPF). The method including, but not limited to identifying a faulty condition of the engine system and, in case that such faulty condition is not critical, measuring the intake air charge and, in case such intake air charge is acceptable, and performing a regeneration process for said Diesel Particulate Filter (DPF). | 08-04-2011 |
20110246045 | METHOD FOR CONTROLLING A GLOW PLUG OF A COMBUSTION MACHINE OF A VEHICLE AND CONTROLLER FOR A GLOW PLUG OF COMBUSTION MACHINE OF A VEHICLE - A method is provided for controlling a glow plug of a combustion machine of a vehicle, the glow plug being driven by a first predetermined effective voltage, the first predetermined effective voltage being lower than the voltage of the battery of the vehicle when the combustion machine is running | 10-06-2011 |
20110251774 | METHOD FOR CONTROLLING GLOW PLUGS IN A DIESEL ENGINE, PARTICULARLY FOR MOTOR-VEHICLES - A method for controlling glow plugs associated with respective cylinders of a Diesel engine, which includes, but is not limited to the steps of storing data indicative of the activation sequence of the cylinders and activating sequentially each glow plug according to the stored activation sequence of the cylinders. | 10-13-2011 |
20110285537 | METHOD FOR THE ESTIMATION OF OIL VISCOSITY IN AN INTERNAL COMBUSTION ENGINE - A method for the estimation of oil viscosity in an internal combustion engine, the engine subjected to fuel post injections to activate Particulate Filter regeneration processes and to fuel hydrocarbons (HC) evaporation events affecting said oil viscosity. The method includes, but is not limited to determining if the particulate filter is subjected to a regeneration process and, in the affirmative case, calculating an oil viscosity decrease during said Particulate Filter regeneration process as a function of an oil dilution rate, and calculating an oil viscosity increase after said regeneration process as a function of an Hydrocarbon (HC) evaporation rate and of a time during which fuel Hydrocarbon evaporation takes place, where said evaporation time is determined as a function of a time spent in evaporating fuel Hydrocarbon from engine oil in a previous fuel hydrocarbons evaporation event. | 11-24-2011 |