Patent application number | Description | Published |
20080216787 | Method for starting an internal combustion engine - To achieve a reliable and exhaust-optimized combustion starting already from the beginning of a combustion phase in the startup of an internal combustion engine, the internal combustion engine is brought to a target speed by an electric motor in a drag phase, the target speed being higher than the previously known starting speed. The target speed corresponds approximately to an idling speed assigned to the internal combustion engine, for example. After exceeding the starting speed, first a mixture enrichment is determined, taking into account a prevailing state of a wall film here in particular. Only after reaching the target speed is the fuel metered and does the combustion take place in the combustion phase. The fuel is metered here in particular on the basis of the mixture enrichment determined after exceeding the starting speed. | 09-11-2008 |
20090025695 | METHOD FOR THE OPERATION OF AN INTERNAL COMBUSTION ENGINE - The invention deals with a method for the operation of an internal combustion engine with at least two cylinders, which can be operated with a fuel of variable quality stored in a tank and/or with fuel blends stored in the tank from a first and at least a second fuel in variable mixing ratios, and wherein variable fuel qualities and/or fuel blends of different compositions require variable air/fuel ratios for the achievement of a stable combustion and/or have a variable vaporization behavior. Provision is, thereby, made for a variation, which is individually adjusted to each cylinder, of the quantity of fuel delivered to the cylinder to be implemented to supply a lean and/or to a rich air/fuel mixture at least one cylinder, for the effect of the variation on the starting characteristics and/or the running smoothness of the cylinder and/or the internal combustion engine to be evaluated and when an improvement in the starting characteristics and/or the running smoothness is achieved, for a fuel adaptation to be implemented for all cylinders. | 01-29-2009 |
20090105038 | HYBRID DRIVE HAVING A SEPARATING CLUTCH WHICH ASSISTS A DIRECT START - A method for operating a hybrid drive of a vehicle, having an internal combustion engine and having at least one electric drive, to which at least one traction battery is assigned, as well as to a hybrid drive, especially a parallel hybrid drive. The internal combustion engine is able to be started from the operating mode “purely electrical driving” of the hybrid drive using a direct start without a starter. | 04-23-2009 |
20090157285 | Method for operating an internal combustion engine, and control or regulating device for an internal combustion engine - In a method for operating a direct-injection internal combustion engine, a position of at least one piston inside a cylinder in which the combustion engine is at a standstill is determined; and a starting cylinder into which fuel is injected first is selected for a start following the standstill. An instantaneous charge of the starting cylinder is determined as a function of a duration of the standstill of the combustion engine. A distance (d) between the piston of the starting cylinder and a specified position of the piston is calculated. A minimum distance of the piston of the selected cylinder is determined as a function of the instantaneous charge; and another cylinder is selected as starting cylinder if the distance (d) between the piston of the starting cylinder and the specified position is less than the minimum distance. | 06-18-2009 |
20090210132 | Method for Operating an Internal Combustion Engine - In an internal combustion engine, fuel is directly injected into at least one combustion chamber at least during a compression stroke in such a way that a stratified mixture is present in the combustion chamber. This mixture is then externally ignited. The fuel is introduced during the compression stroke by at least one main injection and an ignition injection, the ignition injection taking place immediately before an ignition and producing at least essentially no torque. | 08-20-2009 |
20100071661 | METHOD FOR FUEL INJECTION - A method for starting an internal combustion engine that is operated with a fuel mixture made of at least two types of fuel. An injection of the fuel into combustion chambers of the internal combustion engine occurs starting at a predefined pressure threshold of the fuel in a fuel supply according to a high-pressure starting mode, and also according to a low-pressure starting mode if the predefined pressure threshold is no longer met. The pressure threshold is selected as a function of the mixture ratio of the fuel types in the fuel mixture. In this way it can be achieved that differences can be taken into consideration in the optimal mixture formation of the fuel types. | 03-25-2010 |
20110088647 | METHOD FOR STARTING AN INTERNAL COMBUSTION ENGINE WITH START-STOP FUNCTION - In a method for starting an internal combustion engine ( | 04-21-2011 |
20110184633 | Method for starting an internal combustion engine - A method for starting an internal combustion engine, in which a control unit starts at least one function at a specific crankshaft angle, the function being shifted from the start of the internal combustion engine until a final condition is reached by a relative angle to a later crankshaft angle. | 07-28-2011 |
20110208401 | METHOD AND DEVICE FOR DETECTING A RUNNING INTERNAL COMBUSTION ENGINE IN A HYBRID VEHICLE - In a method for detecting a running internal combustion engine in a hybrid vehicle, the internal combustion engine, as a first drive unit, and a second drive unit contribute toward driving the hybrid vehicle. To determine reliably whether the internal combustion engine is running during hybrid operation, an interference signal is actively introduced into the ongoing operating sequence of the internal combustion engine, and the response of the internal combustion engine to this interference signal is evaluated. If there is no response of the internal combustion engine, it is concluded that the internal combustion engine is not operating. | 08-25-2011 |
20120296554 | Method for operating an internal combustion engine - A method for operating an internal combustion engine in which a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of the fuel, is determined during the warm-up of the internal combustion engine and an ideal fuel quantity, which is to be injected into at least one combustion chamber of the internal combustion engine during the warm-up, is ascertained therefrom. | 11-22-2012 |
20130166177 | METHOD AND DEVICE FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for stopping an internal combustion engine, wherein an amount of air which is supplied via an air metering device of the internal combustion engine, in particular a throttle flap ( | 06-27-2013 |
20130179054 | METHOD AND DEVICE FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE - The invention relates to a method for restarting an internal combustion engine, in which a first cylinder (ZYL | 07-11-2013 |
20130298875 | METHOD FOR OPERATING A MOTOR VEHICLE - A method for operating a motor vehicle having a hybrid drive which includes an internal combustion engine having an injection system and an electric motor, in which in an operating situation, in which the motor vehicle is driven by the electric motor and the internal combustion engine is turned off, a level of the fuel pressure in the injection system is increased by the electric motor to prepare a start of the internal combustion engine. | 11-14-2013 |
20140100764 | Method for operating an internal combustion engine - A method is described for operating an internal combustion engine, the internal combustion engine including an angle of rotation sensor. In normal operation, a function is activated at a first angle of rotation. In stop operation, internal combustion engine is temporarily brought to a standstill. The function is activated in a start operation following the stop operation at a second angle of rotation, which follows the first angle of rotation in the direction of rotation. | 04-10-2014 |