SPARK TIMING AND CONTROL DURING TRANSITIONS BETWEEN SPARK IGNITED COMBUSTION AND HOMOGENOUS CHARGE COMPRESSION IGNITION
First Claim
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1. A control system for an engine, comprising:
- an air per cylinder (APC) generating module that generates measured and desired APC values;
a combustion transition module that selectively transitions the engine from spark ignition (SI) combustion to homogeneous charge compression ignition (HCCI) combustion and from HCCI combustion to SI combustion;
a spark control module that selectively retards spark during said transitions based on a ratio of said measured APC value and said desired APC value.
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Abstract
A control system for an engine comprises an air per cylinder (APC) generating module that generates measured and desired APC values. A combustion transition module selectively transitions the engine from spark ignition (SI) combustion to homogeneous charge compression ignition (HCCI) combustion and from HCCI combustion to SI combustion. A spark control module selectively retards spark during the transitions based on a ratio of the measured APC value and the desired APC value. Alternately, spark retard can be based on measured and desired engine torque representing values (ETRVs).
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Citations
28 Claims
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1. A control system for an engine, comprising:
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an air per cylinder (APC) generating module that generates measured and desired APC values; a combustion transition module that selectively transitions the engine from spark ignition (SI) combustion to homogeneous charge compression ignition (HCCI) combustion and from HCCI combustion to SI combustion; a spark control module that selectively retards spark during said transitions based on a ratio of said measured APC value and said desired APC value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control system for an engine, comprising:
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an engine torque representing value (ETRV) generating module that generates measured and desired ETRV values; a combustion transition module that selectively transitions the engine from spark ignition (SI) combustion to homogeneous charge compression ignition (HCCI) combustion and from HCCI combustion to SI combustion; a spark control module that selectively retards spark during said transitions based on a ratio of said measured ETRV value and said desired ETRV value. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method for controlling for an engine, comprising:
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generating measured and desired an engine torque representing values (ETRVs); selectively transitioning the engine from spark ignition (SI) combustion to homogeneous charge compression ignition (HCCI) combustion and from HCCI combustion to SI combustion; and selectively retarding spark during said transitions based on a ratio of said measured ETRV value and said desired ETRV value. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method for controlling for an engine, comprising:
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generating measured and desired air per cylinder (APC) values; selectively transitioning the engine from spark ignition (SI) combustion to homogeneous charge compression ignition (HCCI) combustion and from HCCI combustion to SI combustion; and selectively retarding spark during said transitions based on a ratio of said measured APC value and said desired APC value. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification