초록 ▼

The disclosure relates to a method for operating a spark ignition gas engine, with fuel gas in the form of biogas by setting an ignition time (ZZP) of the spark ignition gas engine. The method comprises to following steps: mixing of air and fuel gas to form a combustible gas mixture in a mixing arra

The disclosure relates to a method for operating a spark ignition gas engine, with fuel gas in the form of biogas by setting an ignition time (ZZP) of the spark ignition gas engine. The method comprises to following steps: mixing of air and fuel gas to form a combustible gas mixture in a mixing arrangement, feeding in and igniting the combustible gas mixture in the combustion chamber while setting an ignition time (ZZP) and burning the combustible gas mixture while discharging exhaust gas from the combustion chamber. The method further comprises the steps of: detection of an exhaust gas temperature (T_AG) of the exhaust gas, predefining at least one reactor position (LRV) of a component of the mixing arrangement, setting the ignition time (ZZP) of the spark ignition gas engine as a function of the exhaust gas temperature (T_AG) and the reactor position (LRV). The reactor position (LRV) is predefined as a manipulated variable by a mixture controller.

대표청구항 ▼

1. A method for operating a gasoline engine with fuel gas in the form of biogas, with an ignition time being adjusted, comprising: mixing air and fuel gas to form a combustion gas mixture in a mixing arrangement;supplying and igniting the combustion gas mixture in a combustion chamber with an adjust

1. A method for operating a gasoline engine with fuel gas in the form of biogas, with an ignition time being adjusted, comprising: mixing air and fuel gas to form a combustion gas mixture in a mixing arrangement;supplying and igniting the combustion gas mixture in a combustion chamber with an adjustment of the ignition time as well as burning the combustion gas mixture and discharging exhaust from the combustion chamber;detecting an exhaust temperature of the exhaust;predetermining at least one throttle setting of a component of the mixing arrangement;adjusting the ignition time of the gasoline engine depending on the exhaust temperature and the throttle setting, with the throttle setting being predetermined by a mixture control as a control variable; wherein the ignition time is adjusted based at least upon: a caloric value of the fuel gas stated depending on the throttle setting; anda target value of the ignition time stated depending on the caloric value of the fuel gas;wherein the statements are corrected in order to provide the target value of the ignition time of the gasoline engine depending on the throttle setting. 2. A method according to claim 1, wherein the throttle setting is predetermined by the mixture control as the control variable with a target value to the component of the mixing arrangement and an ignition timer, to adjust the ignition time via an ignition device of a gasoline engine depending on the exhaust temperature and the throttle setting. 3. A method according to claim 1, wherein: the throttle setting is predetermined by the mixture control as the control variable with a target value to the component of the mixing arrangement and the throttle setting by the component as the actual value to an ignition timer, to adjust the ignition time via an ignition device of a gasoline engine depending on the exhaust temperature and the throttle setting. 4. A method according to claim 1, wherein: the ignition time is adjusted depending on an actual value of the exhaust temperature. 5. A method according to claim 1, wherein: the ignition time is adjusted depending on the throttle setting such that first a preliminary ignition time is determined exclusively based on the throttle setting. 6. A method according to claim 1, wherein the caloric value of the fuel gas is stated based on a composition of the fuel gas or a composition of the fuel gas is stated directly depending on the throttle setting. 7. A method according to claim 1, wherein the ignition time is adjusted via a control value of the ignition time depending on a target value of the ignition time and an actual value of the ignition time as well as an exhaust temperature such that an actual value of an exhaust temperature is or remains within a predetermined exhaust temperature range. 8. A method according to claim 7, wherein: the control value of the ignition time of an ignition device of the gasoline engine is transmitted as a guideline only when the actual value of the exhaust temperature is within a predetermined exhaust temperature range. 9. A method according to claim 7, wherein: the exhaust temperature range is determined via a maximum exhaust temperature and a minimum exhaust temperature dependent on an output power of the gasoline engine, particularly an output power of a generator connected to the gasoline engine. 10. A control device for operating a gasoline engine, operated with a fuel gas in the form of biogas, with an ignition time of the gasoline engine being adjusted, comprising: a mixing control with an output for a control variable to predetermine a throttle setting of a component of a mixing device for air and fuel gas to form a combustion gas mixture,an ignition timer, including: an input for an exhaust temperature of an exhaust from the combustion chamber of the gasoline engine andan input for a throttle setting of the component of the mixing arrangement,a processor configured to predetermine an ignition time for an ignition device of the gasoline engine depending on the exhaust temperature and the throttle setting,an output for the ignition time to the ignition device of the gasoline engine,a control line to guide a value for the throttle setting from the mixture control to the ignition timer and the component of the mixing arrangement;wherein control line is configured to adjust the ignition time based at least upon: a caloric value of the fuel gas stated depending on the throttle setting; anda target value of the ignition time stated depending on the caloric value of the fuel gas;wherein the statements are corrected in order to provide the target value of the ignition time of the gasoline engine depending on the throttle setting. 11. A control device according to claim 10, wherein: the mixing control and the ignition timer are connected via the control line to guide a target value for the throttle setting. 12. A control device according to claim 11, wherein: the ignition timer and the component of the mixing arrangement are connected via the control line to guide an actual value for the throttle setting. 13. A control device according to claim 10, wherein: the processor of the ignition timer shows a characteristic for a throttle setting of a component of the mixing arrangement of the gasoline engine designed for a gasoline engine with the characteristic stating the throttle setting depending on a composition of the fuel gas. 14. A control device according to claim 10, wherein: the processor of the ignition timer comprises characteristic for an ignition time-designed for the gasoline engine for an ignition device of the gasoline engine, with the characteristic stating the ignition time depending on a composition of the fuel gas. 15. A control device according to claim 10, wherein: the ignition timer comprises a control unit, by which an ignition time can be released in case an actual value of an exhaust temperature is in a range of the exhaust temperature depending on an output power of the gasoline engine.