摘要:
A method for operating an internal combustion engine of a motor vehicle having an engine control unit and an exhaust-gas catalytic converter. In the invention, the engine control unit is used to switch off the internal combustion engine in an idling mode and/or in an overrun mode of the internal combustion engine, depending on the temperature of the exhaust-gas catalytic converter and an exhaust-gas temperature.
摘要:
1. Internal combustion engine comprising a gas conveying system and operating method therefor. 2.1 The invention proposes an internal combustion engine (1) having a gas conveying system with a turbine (7) which can be driven by an airstream and a pump (8) which can be driven by the turbine (7) and by means of which gas can be fed to the exhaust system (3, 4, 5), as well as an operating method therefor. 2.2. According to the invention, when the internal combustion engine (1) is starting up, the quantity of fuel injected into it is set as a function of the delivery capacity of the pump (8). 2.3. Use in motor vehicles, in particular in passenger cars having an internal combustion engine with fuel injection.
摘要:
In an exhaust system for an internal combustion engine having two groups of cylinders with a separate exhaust line for each cylinder group, each including an upstream catalytic converter and a downstream catalytic converter and a control valve, a first transverse connection extending between the exhaust lines upstream of the upstream catalytic converters and a second transverse connection extending between the exhaust lines between the upstream and downstream catalytic converters, the valves are so arranged and controlled that, during warm-up, the exhaust gases from both cylinder groups flow through the upstream catalytic converter of one, and the downstream catalytic converter of the other exhaust line for rapid heat up of one of the catalytic converters in each of the exhaust lines.
摘要:
In a method for making it easier to start an internal combustion engine having at least one cylinder in which there is at least one piston which is intended to execute an oscillating motion between a top dead center and a bottom dead center, air or a fuel-air mixture is drawn in via an induction line as a result of a movement of the piston toward the bottom dead center. After the bottom dead center has been passed and after the piston has started to move toward the top dead center, the air or the fuel-air mixture is discharged from the cylinder via the induction line. Intake valves are closed at a time which is shifted toward the top dead center. A control element arranged in the induction line closes the induction line after the piston has passed the bottom dead center.
摘要:
A process for the desulfurization of an engine fuel onboard a motor vehicle includes separating sulfur-containing components of the engine fuel by selective liquid-phase adsorption on an adsorption material. The adsorption material may be an oxide of Al, Mg, Si, or Ti that is doped with Ag.
摘要:
In known starting devices, an individual starter is provided which accelerates the internal combustion engine to only a relatively low rotational speed at which an initial injection with subsequent combustion takes place. During a cold start of the internal combustion engine, it is therefore absolutely necessary to provide a relatively rich fuel/air mixture for the initial injection. However, this results in a situation in which, during this phase, relatively high exhaust gas emissions, in particular of hydrocarbons, are produced, which cannot be controlled by a catalytic converter which is not yet at its operating temperature. In order to reduce the exhaust gas emissions, a starting device for an internal combustion engine is proposed which has two starters for starting the internal combustion engine, a first starter being activated at the beginning of the starting process and being deactivated after a specific rotational speed of the internal combustion engine has been reached, a second starter (2) being activated. The second starter subsequently drives the internal combustion engine further to a specific setpoint rotational speed, after which, when the setpoint rotational speed has been reached, an initial injection of fuel for subsequent combustion is carried out. The starting device according to the invention is provided for internal combustion engines of vehicles.
摘要:
In a method of controlling adjustable operating parameters of an internal combustion engine with direct fuel injection which includes at least one cylinder having a piston delimiting a combustion chamber, a fuel injector and a spark plug, wherein air supplied to the combustion chamber through an air intake passage forms with the fuel injected by the fuel injector a fuel/air mixture which is compressed and produces a plasma cloud which is then ignited by a spark generated between the electrodes of the spark plug, the ionization degree of the plasma cloud is measured and an ionization signal is formed and supplied to an electronic control unit where it is utilized to control at least one operating parameter of the internal combustion engine.
摘要:
In an arrangement for controlling the charging air flow of a supercharged internal combustion engine which has an intake air pipe with a throttle valve connected to the discharge side of a supercharger and a communication pipe extending from the intake air pipe to the engine exhaust manifold for supplying air to the engine exhaust gas, an air supply pipe extends from an air filter housing to the supercharger suction side and a return air duct including a flow control valve extends from the intake air pipe to the air filter housing for recirculating air to the supercharger suction side through the air filter housing under the control of the flow control valve for controlling the air pressure in the engine intake air pipe.
摘要:
In a method for operating a spark-ignition internal combustion engine, wherein fuel is metered into the cylinders by direct fuel injection into the combustion chambers and by the addition of fuel in an intake region of the engine and a control unit matches the quantity of fuel to be added in the intake region and the quantity of fuel to be injected directly into the combustion chamber to one another as a function of the operating point of the internal combustion engine so as to provide an ignitable fuel mixture in the combustion chamber, the control unit determines a recirculation rate for the re-circulated exhaust gas and adjusts a predetermined excess air ratio (λ) for the mixture composed of fresh air, re-circulated exhaust gas and fuel by means of the direct injection of fuel into the combustion chamber taking into account the recirculation rate in order to reduce the exhaust emissions of the internal combustion engine and improve fuel consumption.
摘要:
A drive system for a motor vehicle includes an internal combustion engine and a transmission. The internal combustion engine has an associated driveshaft, the transmission has an associated transmission shaft, and the driveshaft and the transmission shaft are connected to one another. A free installation space is provided between the internal combustion engine and the transmission in the direction of the driveshaft and, respectively, of the transmission shaft. The internal combustion engine has an associated electric machine which can be operated as a starter/generator. The electric machine has an associated power electronics unit which is arranged in the free installation space.