摘要:
In a method for the after-treating of an exhaust gas from a preferably direct-injection and/or spark-ignition internal combustion engine, the exhaust gas is fed through a catalytic converter system connected downstream of the internal combustion engine. The system has at least one catalyst with a noble metal depletion having at least the elements palladium and rhodium which are present in a weight ratio of >5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 11:1, or 12:1. In the new European driving cycle, the catalyst exceeds a temperature TK of 300° C., 450° C., 550° C., 600° C. within a time interval of 30 s, preferably 20 s, especially preferably 10 s after starting the engine, and/or the cumulative untreated emissions of hydrocarbons not exceeding 0.05 g/km and/or of nitrogen oxides not exceeding 0.04 g/km within a time interval of 10 s, preferably 20 s, especially preferably 30 s after starting the engine, and/or the engine achieving at least the emissions limit values of EU standard 4, preferably EU standard 5.
摘要:
In a method for the after-treating of an exhaust gas from a preferably direct-injection and/or spark-ignition internal combustion engine, the exhaust gas is fed through a catalytic converter system connected downstream of the internal combustion engine. The system has at least one catalyst with a noble metal depletion having at least the elements palladium and rhodium which are present in a weight ratio of >5:1, 6:1, 7:1, 8:1, 9:1, 10:1, 11:1, or 12:1. In the new European driving cycle, the catalyst exceeds a temperature TK of 300° C., 450° C., 550° C., 600° C. within a time interval of 30 s, preferably 20 s, especially preferably 10 s after starting the engine, and/or the cumulative untreated emissions of hydrocarbons not exceeding 0.05 g/km and/or of nitrogen oxides not exceeding 0.04 g/km within a time interval of 10 s, preferably 20 s, especially preferably 30 s after starting the engine, and/or the engine achieving at least the emissions limit values of EU standard 4, preferably EU standard 5.
摘要:
In a method for adjusting the fuel/air ratio in an internal combustion engine (1) comprising a converter (2) which is associated therewith, a composition of waste gas in the waste gas wing (3, 8) of the internal combustion engine (1) is detected by means of sensors (4, 5) and output signals from at least one of the sensors (4, 5) are used for producing a control signal in order to influence the fuel/air ratio. The fuel/air ratio is switched back and forth between a lean operating state with surplus oxygen and a rich operating state with an oxygen deficit by means of a characteristic line of the control signal. The characteristic line of the control signal is adapted to a current converter state. A characteristic curve contour of the characteristic line is adjusted according to the addition and/or desorption of an oxidation agent in the converter (2). The invention also relates to a device for carrying out said method.
摘要:
A method relates to operating an internal combustion engine in the form of an Otto engine, especially of a motor vehicle. Otto engine fuel (i.e., carburetor fuel, spark ignition engine fuel), such as gasoline or ethanol (E85), are directly injected into at least one combustion chamber of the internal combustion engine with at least one fuel injector. Optionally, instead of injecting ignition spark engine fuel or in addition, the internal combustion engine is operated with gas, especially CNG (compressed natural gas) or LPG (liquefied petroleum gas). During operation of the internal combustion engine with gas only, the engine is automatically switched to the operation with spark ignition engine fuel for a predetermined period, or the engine is switched to the operation with spark ignition engine fuel in addition to the operation with gas, in such a manner that a predetermined quantity of the carburetor fuel flows through the at least one fuel injector. The engine is then automatically switched back to the operation with gas only.
摘要:
An engine configuration includes an internal combustion engine with a plurality of cylinders, at least one turbocharger and a first and a second exhaust gas tract. A turbine of the at least one turbocharger is associated with the first exhaust gas tract. Increased torque and increased power can be achieved when a bypass exhaust gas line emerging from at least one cylinder, which is associated with the first exhaust gas tract, is connected to the first exhaust gas tract such that it bypasses the at least one turbocharger.
摘要:
A method for operating an internal combustion engine in the form of an Otto engine, especially of a motor vehicle, selectively uses carburetor fuel, especially gasoline or ethanol (E85) by direct injection into at least one combustion chamber of the internal combustion engine by means of at least one fuel injector. Optionally, instead of injecting ignition spark engine fuel or in addition to injecting ignition spark engine fuel, the internal combustion engine is operated with gas, especially CNG (Compressed Natural Gas) or LPG (Liquefied Petroleum Gas). A mixture adaptation value is continuously determined during the operation of the internal combustion engine with spark ignition engine fuel. An actual mixture adaptation value is stored in a memory during the operation of the internal combustion engine with the spark ignition engine fuel and, after a predetermined minimum duration of operation with gas, an actual mixture adaptation value is compared with the stored mixture adaptation value during the operation of the internal combustion engine with ignition spark engine fuel. The fuel injectors are scavenged when a difference between the actual mixture adaptation value and the stored mixture adaptation value exceeds a predetermined difference value.
摘要:
A method relates to operating an internal combustion engine in the form of an Otto engine, especially of a motor vehicle. Otto engine fuel (i.e., carburetor fuel, spark ignition engine fuel), such as gasoline or ethanol (E85), are directly injected into at least one combustion chamber of the internal combustion engine with at least one fuel injector. Optionally, instead of injecting ignition spark engine fuel or in addition, the internal combustion engine is operated with gas, especially CNG (compressed natural gas) or LPG (liquefied petroleum gas). During operation of the internal combustion engine with gas only, the engine is automatically switched to the operation with spark ignition engine fuel for a predetermined period, or the engine is switched to the operation with spark ignition engine fuel in addition to the operation with gas, in such a manner that a predetermined quantity of the carburetor fuel flows through the at least one fuel injector. The engine is then automatically switched back to the operation with gas only.
摘要:
A method for operating an internal combustion engine in the form of an Otto engine, especially of a motor vehicle, selectively uses carburetor fuel, especially gasoline or ethanol (E85) by direct injection into at least one combustion chamber of the internal combustion engine by means of at least one fuel injector. Optionally, instead of injecting ignition spark engine fuel or in addition to injecting ignition spark engine fuel, the internal combustion engine is operated with gas, especially CNG (Compressed Natural Gas) or LPG (Liquefied Petroleum Gas). A mixture adaptation value is continuously determined during the operation of the internal combustion engine with spark ignition engine fuel. An actual mixture adaptation value is stored in a memory during the operation of the internal combustion engine with the spark ignition engine fuel and, after a predetermined minimum duration of operation with gas, an actual mixture adaptation value is compared with the stored mixture adaptation value during the operation of the internal combustion engine with ignition spark engine fuel. The fuel injectors are scavenged when a difference between the actual mixture adaptation value and the stored mixture adaptation value exceeds a predetermined difference value.
摘要:
A method is for controlling an overrun condition in a hybrid vehicle having a combustion engine and additionally at least one electric motor as well as an overrun fuel cutoff, which interrupts a fuel supply to the combustion engine when the vehicle is in an overrun condition and restores the fuel supply when the combustion engine reaches or falls below a restoring speed. At least in a combustion engine at operating temperature, the fuel supply is restored at a restoring speed of at most 200 min−1, e.g., at most 100 min−1 above an idling speed of the combustion engine. The restoring speed may be in the range of the idling speed or only slightly above the latter. The restoring speed is thus clearly lowered as compared to the usual restoring speeds and extends the overrun fuel cutoff phases and thus reduces fuel consumption.
摘要:
A method and a device are for the optimized starting of an internal combustion engine using a starter, which is connected to a capacitor store, the capacitor store being connected via a DC/DC converter to a vehicle electrical system of a vehicle, and the vehicle electrical system including an energy store for supplying electrical energy having a nominal voltage, and the starter consuming a starting energy for starting the internal combustion engine, which is a function of a temperature of the internal combustion engine, the temperature of the internal combustion engine being measured by at least one temperature sensor and the capacitor store being charged to a setpoint voltage with the aid of a battery via another DC/DC converter, which connects the battery in parallel to the capacitor store parallel to a switch, the setpoint voltage being set by a control unit such that the electrical energy stored in the capacitor store charged to the setpoint voltage is greater than the starting energy ascertained on the basis of the measured temperature.