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A system (10) for controllably disabling cylinders in an internal combustion engine (12) includes a throttle (18) controlling air flow to an intake manifold (14), a number of cylinder deactivation devices (1001-100K) and an engine controller (28) controlling fueling (90), ignition timing (94) and th

A system (10) for controllably disabling cylinders in an internal combustion engine (12) includes a throttle (18) controlling air flow to an intake manifold (14), a number of cylinder deactivation devices (1001-100K) and an engine controller (28) controlling fueling (90), ignition timing (94) and throttle position (86). The controller (28) is operable to activate only the minimum number of cylinders required to achieve a desired engine/vehicle operating parameter value, open the throttle (18) to a computed throttle position, control ignition timing sufficiently to drive the current value of the engine/vehicle operating parameter to the desired engine/vehicle operating parameter value, and to then control the flow area of the throttle (18) while also controlling ignition timing to maintain the current value of the engine/vehicle operating parameter near the desired engine/vehicle operating parameter value. The engine/vehicle operating parameter may be engine output torque, engine speed or vehicle speed.

대표청구항 ▼

A system (10) for controllably disabling cylinders in an internal combustion engine (12) includes a throttle (18) controlling air flow to an intake manifold (14), a number of cylinder deactivation devices (1001-100K) and an engine controller (28) controlling fueling (90), ignition timing (94) and th

A system (10) for controllably disabling cylinders in an internal combustion engine (12) includes a throttle (18) controlling air flow to an intake manifold (14), a number of cylinder deactivation devices (1001-100K) and an engine controller (28) controlling fueling (90), ignition timing (94) and throttle position (86). The controller (28) is operable to activate only the minimum number of cylinders required to achieve a desired engine/vehicle operating parameter value, open the throttle (18) to a computed throttle position, control ignition timing sufficiently to drive the current value of the engine/vehicle operating parameter to the desired engine/vehicle operating parameter value, and to then control the flow area of the throttle (18) while also controlling ignition timing to maintain the current value of the engine/vehicle operating parameter near the desired engine/vehicle operating parameter value. The engine/vehicle operating parameter may be engine output torque, engine speed or vehicle speed. ranged to detect cylinder pressure within the combustion chamber. 4. The system as claimed in claim 1, wherein the CEI parameter generator processes output of a knock sensor arranged to detect knock occurrence within the combustion chamber. 5. The system as claimed in claim 1, wherein the CEI parameter is the maximum of elevation rate, with respect to crank angle, of cylinder pressure for each engine cycle. 6. The system as claimed in claim 1, wherein the CEI parameter is the maximum cylinder pressure for each engine cycle. 7. The system as claimed in claim 1, wherein the CEI parameter is the crank angle at which cylinder pressure reaches the maximum for each engine cycle. 8. The system as claimed in claim 1, wherein the CEI parameter is the amplitude of cylinder vibration for each engine cycle. 9. The system as claimed in claim 1, wherein the control parameter generator includes logic, according to which, if the CEI parameter falls in a predetermined relationship with a predetermined target value, then the control parameter generator reduces one of the control parameters representing the fuel quantity of the second fuel injection to retard ignition timing point of auto-ignition of the first air/fuel mixture. 10. The system as claimed in claim 1, wherein the control parameter generator includes logic, according to which, if the CEI parameter falls in a predetermined relationship with a predetermined target value, then the control parameter generator retards one of the control parameters representing the injection timing of the second fuel injection. 11. The system as claimed in claim 1, wherein the control parameter generator includes logic, according to which, if the CEI parameter falls in a predetermined relationship with a predetermined target value, then the control parameter generator retards one of the control parameters representing the spark timing to retard ignition timing point of auto-ignition of the first air/fuel mixture. 12. The system as claimed in claim 1, wherein the control parameter generator includes logic, according to which, if the CEI parameter falls in a predetermined relationship with a predetermined target value, then the control parameter generator reduces one of the control parameters representing the fuel quantity of the first fuel injection to adjust ignition timing point of auto-ignition of the first air/fuel mixture. 13. The system as claimed in claim 1, wherein the control parameter generator includes logic, according to which, if the CEI parameter falls in a predetermined relationship with a predetermined target value, then the control parameter generator retards one of the control parameters representing the injection timing of the first fuel injection to adjust ignition timing point of auto-ignition of the first air/fuel mixture. 14. The system as claimed in claim 1, wherein the control parameter generator determines the total of the fuel quantity of the first fuel injection and the fuel quantity of the second fuel injection as a predetermined function of the load request on the engine. 15. An internal combustion engine capable of performing auto-ignited combustion, using a spark timing controller and a fuel supply controller, which have disparate control parameters, the engine comprising: at least one combustion chamber; a spark plug arranged to produce, under control of the spark timing controller, a spark within the combustion chamber at a predetermined location; a fuel supply device operable to perform, under control of the fuel supply controller, a first fuel injection, for each engine cycle, to create a first air/fuel mixture within the combustion chamber and a second fuel injection, in the same engine cycle, to localize fuel to create, in the neighborhood of the spark plug, a localized second air/fuel mixture portion, which is ignitable by the spark produced at the predetermined location; a combustion event indicative (CEI) parameter generator for generating a CEI parameter rela