Sensor and evaluation device, control environment and method for detecting misfiring, and internal combustion engine having the sensor and evaluation device and/or control environment

An internal combustion engine, comprising:

• at least one of:
• (a) a sensor and evaluation device configured for detecting a misfire in the internal combustion engine, the sensor and evaluation device comprising:
• a control sensor system, which includes an acceleration sensor configured for acquiring a sound measurement signal at a first cylinder and for providing a knock signal assigned to the sound measurement signal;
• and
• a module configured for at least one of acquiring and evaluating the knock signal,
• wherein the sensor and evaluation device is configured such that:
• an evaluation-relevant operating cycle angle range is assigned to an operating cycle range after an exhaust valve is opened;
• the sound measurement signal at the first cylinder is detected by the acceleration sensor at least for the evaluation-relevant operating cycle angle range, and
• the knock signal assigned to the sound measurement signal for the evaluation-relevant operating cycle angle range is fed to the module in an evaluable manner;
• (b) a control device;
• (c) a control environment, including:
• a control device;
• a sensor and evaluation device configured for detecting a misfire in the internal combustion engine, the sensor and evaluation device including:
• a control sensor system, which includes an acceleration sensor configured for acquiring a sound measurement signal at a first cylinder and for providing a knock signal assigned to the sound measurement signal;
• and
• a module configured for at least one of acquiring and evaluating the knock signal, the control device including the module, the acceleration sensor being signal-connected with the module,
• wherein the sensor and evaluation device is configured such that:
• an evaluation-relevant operating cycle angle range is assigned to an operating cycle range after an exhaust valve is opened;
• the sound measurement signal at the first cylinder is detected by the acceleration sensor at least for the evaluation-relevant operating cycle angle range, and
• the knock signal assigned to the sound measurement signal for the evaluation-relevant operating cycle angle range is fed to the module in an evaluable manner;
• an encoder unit configured to detect the operating cycle angle, the encoder unit being signal-connected with the module,
• wherein:
• (i) the internal combustion engine includes a plurality of cylinders including the first cylinder, the first cylinder including an intake valve and the exhaust valve;
• (ii) the internal combustion engine is configured such that an operating medium in the first cylinder is viable for an ignition and a combustion by driving a piston in the first cylinder, which is configured for cycling an operating cycle for an intake, a compression, a working, and an expulsion of the operating medium via a piston stroke, wherein the intake is associated with opening of the intake valve and the expulsion is associated with opening of the exhaust valve;
• and
• (iii) the intake valve and the exhaust valve are configured for being operated by way of a valve train via an operating cycle angle of the operating cycle for the operating medium.

A method for detecting an ignition misfire in an internal combustion engine, the method comprising the steps of:

• providing the internal combustion engine, which includes:
• at least one of:
• (a) a sensor and evaluation device configured for detecting a misfire in the internal combustion engine, the sensor and evaluation device comprising:
• a control sensor system, which includes an acceleration sensor configured for acquiring a sound measurement signal at a first cylinder and for providing a knock signal assigned to the sound measurement signal;
• and
• a module configured for at least one of acquiring and evaluating the knock signal,
• wherein the sensor and evaluation device is configured such that:
• an evaluation-relevant operating cycle angle range is assigned to an operating cycle range after an exhaust valve is opened;
• the sound measurement signal at the first cylinder is detected by the acceleration sensor at least for the evaluation-relevant operating cycle angle range, and
• the knock signal assigned to the sound measurement signal for the evaluation-relevant operating cycle angle range is fed to the module in an evaluable manner;
• (b) a control device;
• (c) a control environment, including:
• a control device;
• a sensor and evaluation device configured for detecting a misfire in the internal combustion engine, the sensor and evaluation device including:
• a control sensor system, which includes an acceleration sensor configured for acquiring a sound measurement signal at a first cylinder and for providing a knock signal assigned to the sound measurement signal;
• and
• a module configured for at least one of acquiring and evaluating the knock signal, the control device including the module, the acceleration sensor being signal-connected with the module,
• wherein the sensor and evaluation device is configured such that:
• an evaluation-relevant operating cycle angle range is assigned to an operating cycle range after an exhaust valve is opened;
• the sound measurement signal at the first cylinder is detected by the acceleration sensor at least for the evaluation-relevant operating cycle angle range, and
• the knock signal assigned to the sound measurement signal for the evaluation-relevant operating cycle angle range is fed to the module in an evaluable manner;
• an encoder unit configured to detect the operating cycle angle, the encoder unit being signal-connected with the module,
• wherein:
• (i) the internal combustion engine includes a plurality of cylinders including the first cylinder, the first cylinder including an intake valve and the exhaust valve;
• (ii) the internal combustion engine is configured such that an operating medium in the first cylinder is viable for an ignition and a combustion by driving a piston in the first cylinder, which is configured for cycling an operating cycle for an intake, a compression, a working, and an expulsion of the operating medium via a piston stroke, wherein the intake is associated with opening of the intake valve and the expulsion is associated with opening of the exhaust valve;
• (iii) the intake valve and the exhaust valve are configured for being operated by way of a valve train via an operating cycle angle of the operating cycle for the operating medium;
• (iv) wherein the internal combustion engine includes the control device and the control sensor system, which is signal-connected to the control device;
• detecting, using the acceleration sensor of the control sensor system, the sound measurement signal at the first cylinder, the acceleration sensor providing the knock signal that is assigned to the sound measurement signal;
• detecting an evaluating, using the module, the knock signal;
• assigning the evaluation-relevant operating cycle angle range to the operating cycle range after the exhaust valve is opened;
• detecting the sound measurement signal at the first cylinder by a knock sensor at least for the evaluation-relevant operating cycle angle range, the acceleration sensor being the knock sensor;
• and
• evaluating the knock signal assigned to the sound measurement signal for the evaluation-relevant operating cycle angle range, and feeding the knock signal to the module.