Cylinder cutout strategy for engine stability
First Claim
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1. A method for controlling operation of an engine having a plurality of cylinders, comprising the steps of:
- determining an engine load is within a predetermined unstable range;
monitoring a parameter specific to engine operation and indicative of engine speed;
determining a range of fluctuation of the parameter from a desired parameter value; and
selectively disabling operation of at least one cylinder and less than all of the plurality of cylinders in response to the range of fluctuation being greater than a predetermined threshold.
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Abstract
A method for controlling operation of an engine having a plurality of cylinders. The method includes monitoring a parameter associated with engine operation, determining a range of fluctuation of the parameter from a desired parameter value, and selectively disabling operation of at least one cylinder and less than all of the plurality of cylinders in response to the range of fluctuation being greater than a predetermined threshold.
38 Citations
14 Claims
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1. A method for controlling operation of an engine having a plurality of cylinders, comprising the steps of:
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determining an engine load is within a predetermined unstable range; monitoring a parameter specific to engine operation and indicative of engine speed; determining a range of fluctuation of the parameter from a desired parameter value; and selectively disabling operation of at least one cylinder and less than all of the plurality of cylinders in response to the range of fluctuation being greater than a predetermined threshold. - View Dependent Claims (2, 3, 4)
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5. A method for controlling operation of an engine having a plurality of cylinders, comprising the steps of:
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determining an operating condition of the engine; monitoring a parameter specific to engine operation; determining a range of fluctuation of the parameter from a desired parameter value; selectivity disabling operation of at least one cylinder and less than all of the plurality of cylinders in response to the range of fluctuation being greater than a predetermined threshold; and enabling operation of each of the plurality of cylinders in response to determining a change in the determined operating condition of the engine; wherein determining an operating condition of the engine includes the step of determining a no load idle operating of the engine. - View Dependent Claims (6)
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7. A method for controlling operation of an engine having a plurality of cylinders and a corresponding one of a plurality of fuel injectors for each cylinder, comprising the steps of:
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determining an operating condition of the engine; monitoring a parameter specific to engine operation and indicative of engine speed; determining a range of fluctuation of the parameter from a desired parameter value; reducing the range of fluctuation of the parameter at least in part via a step of selectively disabling a delivery of fuel from at least one fuel injector and less than all of the plurality of fuel injectors to a corresponding at least one cylinder, and a step of selectivity increasing a delivery of fuel from a normal operating value to an increased operating value from each of the remaining enabled fuel injectors to each corresponding enabled cylinder. - View Dependent Claims (8)
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9. A method for controlling operation of an engine having a plurality of cylinders and a corresponding one of a plurality of fuel injectors for each cylinder comprising the steps of :
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determining an operation condition of the engine; monitoring a parameter specific to engine operation; determining a range of fluctuation of the parameter from a desired parameter value; selectivity disabling a delivery of fuel from at least one fuel injector and less than all of the plurality of fuel injectors to a corresponding at least one cylinder in response to the range of fluctuation being greater than a predetermined threshold; and increasing a delivery of fuel from a normal operating value to an increased operating value from each of the remaining enabled fuel injectors to each corresponding enabled cylinder;
wherein determining an operating condition of the engine includes the step of determining a no load idle operating condition of the engine. - View Dependent Claims (10)
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11. A method for controlling operation of an engine having a plurality of cylinders, comprising the steps of:
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determining a no load idle operating condition of the engine; monitoring a speed of the engine; determining a range of fluctuation of the engine speed from a desired engine speed; selectively disabling operation of at least one cylinder and less than all of the plurality of cylinders in response to the range of fluctuation being greater than a predetermined threshold; and enabling operation of each of the plurality of cylinders in response to determining a load being applied to the engine. - View Dependent Claims (12, 13, 14)
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Specification