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US 10,760,514 B2Granted
Methods and system for operating an engine
AssigneeFord Global Technologies, LLC
InventorsChristopher Paul Glugla, Gopichandra Surnilla, Imtiaz Ali, Lyth Alobiedat
Life of this patent
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Abstract
Systems and methods for operating an engine that includes a compression ratio linkage for adjusting engine compression ratio are described. The systems and methods provide different ways of diagnosing the presence or absence of engine misfire in response to engine operating regions that may be more or less prone to torsional engine crankshaft vibration. In one example, engine misfire may be determined responsive to force applied to an engine compression ratio changing linkage.
Claims19
An engine operating method, comprising:
- adjusting an engine actuator via a controller in response to engine misfire indicated from an engine crankshaft position while operating an engine in a first operating region;
- and
- adjusting the engine actuator via the controller in response to engine misfire indicated from output of a sensor coupled to an engine compression ratio adjusting linkage while operating the engine in a second operating region, wherein the output of the sensor is within a predetermined crankshaft angular range, wherein engine misfire is determined via current supplied to a motor that adjusts the engine compression ratio adjusting linkage only when an engine compression ratio is not changing.
An engine operating method, comprising:
- adjusting a compression ratio of a cylinder via adjusting a position of a control linkage in response to output of a controller;
- receiving input from a sensor positioned along the control linkage to the controller or receiving a determination of an amount of electrical current supplied to a motor to maintain a position of an engine cylinder compression ratio changing linkage;
- adjusting an engine actuator responsive to engine misfire determined from output of the sensor when the controller is not adjusting the compression ratio and not adjusting the engine actuator responsive to output of the sensor when the controller is adjusting the compression ratio;
- and
- adjusting the engine actuator responsive to the output of the sensor, the output of the sensor within a predetermined crankshaft angular range, wherein engine misfire is determined via current supplied to the motor that adjusts the engine cylinder compression ratio changing linkage only when the engine compression ratio is not changing.
2 more elements
An engine operating method, comprising:
- adjusting a compression ratio of a cylinder via adjusting a position of a control linkage in response to output of a controller;
- receiving input from a sensor positioned along the control linkage to the controller or receiving a determination of an amount of electrical current supplied to a motor to maintain a position of an engine cylinder compression ratio changing linkage;
- adjusting an engine actuator responsive to engine misfire determined from output of the sensor when the controller is not adjusting the compression ratio and not adjusting the engine actuator responsive to output of the sensor when the controller is adjusting the compression ratio;
- determining a presence or absence of engine misfire via determining a crankshaft angle during a cylinder cycle where force applied to the control linkage is determined to be greatest based on operating conditions;
- and
- determining the presence of engine misfire in response to the crankshaft angle being within a predetermined crankshaft angle range of top-dead-center compression stroke of the cylinder, and wherein engine misfire is diagnosed responsive to crankshaft position while operating an engine in a low torsional vibration engine operating range and engine misfire is diagnosed responsive to force applied to the compression ratio changing linkage while operating the engine in a high torsional vibration engine operating range.
3 more elements
Dependencies are inferred from the claim text.