Control system for cylinder cut-off internal combustion engine
First Claim
1. A system for controlling an internal combustion engine having a plurality of cylinders and mounted on a vehicle, comprising:
- an engine operation controller that conducts a switching control of engine operation based on a load of the engine between a full-cylinder operation in which all of the cylinders are operative and a cut-off cylinder operation in which some of the cylinders are inoperative; and
a running controller that conducts a running control of the vehicle including at least one of a cruise control in which the vehicle runs at a desired vehicle velocity and a preceding vehicle follow-up control in which the vehicle runs at a desired vehicle velocity to maintain a desired inter-vehicle distance from a preceding vehicle;
wherein the engine operation controller switches engine operation to the full-cylinder operation if it is determined that deceleration is required by the running controller when the running controller conducts at least one of the cruise control and the preceding vehicle follow-up control, andwherein the engine operation controller switches engine operation to the full-cylinder operation if deceleration is required by the running controller when a supply of fuel to the engine is cut off.
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Accused Products
Abstract
In a control system for an internal combustion engine having a plurality of cylinders and mounted on a vehicle, in which the engine operation is switched based on the throttle opening between a full-cylinder operation in which all of the cylinders are operative and a cut-off cylinder operation in which some of the cylinders are inoperative, and a running control including at least a cruise control in which the vehicle runs at a desired vehicle velocity is conducted, the engine operation is switched to the full-cylinder operation when it is determined that deceleration is required in the running control, so as to increase pumping loss (engine loss). With this, it becomes possible to generate the deceleration sufficiently as desired, when, for example, the vehicle descends a downhill.
28 Citations
18 Claims
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1. A system for controlling an internal combustion engine having a plurality of cylinders and mounted on a vehicle, comprising:
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an engine operation controller that conducts a switching control of engine operation based on a load of the engine between a full-cylinder operation in which all of the cylinders are operative and a cut-off cylinder operation in which some of the cylinders are inoperative; and a running controller that conducts a running control of the vehicle including at least one of a cruise control in which the vehicle runs at a desired vehicle velocity and a preceding vehicle follow-up control in which the vehicle runs at a desired vehicle velocity to maintain a desired inter-vehicle distance from a preceding vehicle; wherein the engine operation controller switches engine operation to the full-cylinder operation if it is determined that deceleration is required by the running controller when the running controller conducts at least one of the cruise control and the preceding vehicle follow-up control, and wherein the engine operation controller switches engine operation to the full-cylinder operation if deceleration is required by the running controller when a supply of fuel to the engine is cut off. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling an internal combustion engine having a plurality of cylinders and mounted on a vehicle, comprising the steps of:
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conducting a switching control of engine operation based on a load of the engine between a full-cylinder operation in which all of the cylinders are operative and a cut-off cylinder operation in which some of the cylinders are inoperative; and conducting a running control of the vehicle including at least one of a cruise control in which the vehicle runs at a desired vehicle velocity and a preceding vehicle follow-up control in which the vehicle runs at a desired vehicle velocity to maintain a desired inter-vehicle distance from a preceding vehicle; wherein the step of engine operation control switches engine operation to the full-cylinder operation if it is determined that deceleration is required by the step of running control when the running controller conducts at least one of the cruise control and the preceding vehicle follow-up control, and wherein the step of engine operation control switches engine operation to the full-cylinder operation if deceleration is required by the step of running control when a supply of fuel to the engine is cut off. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification