CONTROL APPARATUS FOR ENGINE
First Claim
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1. A control apparatus for an engine, the control apparatus comprising:
- an engine having a combustion chamber;
a state quantity setting device mounted to the engine, the state quantity setting device configured to adjust introduction of fresh air and burned gas into the combustion chamber;
an injector mounted to the engine, the injector configured to inject fuel;
a spark plug disposed so as to face an inside of the combustion chamber; and
a controller connected to the state quantity setting device, the injector, and the spark plug, the controller configured to output control signals to the state quantity setting device, the injector, and the spark plug, whereinthe controller sets a G/F that represents an index associated with a weight ratio between total gas, containing burned gas, in the combustion chamber, and fuel such that the G/F is in a range from 18 to 50 by the controller outputting control signals to the state quantity setting device and the injector, andunburned air-fuel mixture is combusted by autoignition after the spark plug ignites air-fuel mixture.
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Abstract
A control apparatus for an engine includes an engine, a state quantity setting device, an injector, a spark plug, and a controller. The controller sets a G/F in a range from 18 to 50. After the spark plug ignites air-fuel mixture, unburned air-fuel mixture is combusted by autoignition.
13 Citations
15 Claims
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1. A control apparatus for an engine, the control apparatus comprising:
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an engine having a combustion chamber; a state quantity setting device mounted to the engine, the state quantity setting device configured to adjust introduction of fresh air and burned gas into the combustion chamber; an injector mounted to the engine, the injector configured to inject fuel; a spark plug disposed so as to face an inside of the combustion chamber; and a controller connected to the state quantity setting device, the injector, and the spark plug, the controller configured to output control signals to the state quantity setting device, the injector, and the spark plug, wherein the controller sets a G/F that represents an index associated with a weight ratio between total gas, containing burned gas, in the combustion chamber, and fuel such that the G/F is in a range from 18 to 50 by the controller outputting control signals to the state quantity setting device and the injector, and unburned air-fuel mixture is combusted by autoignition after the spark plug ignites air-fuel mixture. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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2. A control apparatus for an engine, the control apparatus comprising:
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an engine having a combustion chamber; a state quantity setting device mounted to the engine, the state quantity setting device configured to adjust introduction of fresh air and burned gas into the combustion chamber; an injector mounted to the engine, the injector configured to inject fuel; a spark plug disposed so as to face an inside of the combustion chamber; and a controller connected to the state quantity setting device, the injector, and the spark plug, the controller configured to output control signals to the state quantity setting device, the injector, and the spark plug, wherein the controller sets a G/F that represents an index associated with a weight ratio between total gas, containing burned gas, in the combustion chamber, and fuel such that the G/F is in in a range from 18 to 50, by the controller outputting control signals to the state quantity setting device and the injector, and the controller causes the spark plug to perform ignition at predetermined timing, and thus controls a flame propagation combustion time of ignited air-fuel mixture, to further control an autoignition time, of unburned air-fuel mixture, after start of flame propagation combustion.
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Specification