METHOD AND APPARATUS FOR CONTROLLING ENGINE
PROBLEM TO BE SOLVED: To further effectively enhance the thermal efficiency of an engine by allowing compression self-ignition combustion under a lean air-fuel ratio to be performed in a wider rotation range. SOLUTION: In the engine, in which compression self-ignition combustion under an air-fuel ra...
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| creator | IWAI KOHEI OBA SHUJI YAMAKAWA MASANAO |
| description | PROBLEM TO BE SOLVED: To further effectively enhance the thermal efficiency of an engine by allowing compression self-ignition combustion under a lean air-fuel ratio to be performed in a wider rotation range. SOLUTION: In the engine, in which compression self-ignition combustion under an air-fuel ratio leaner than the theoretical air-fuel ratio is allowed to be performed at least in a low load range of the engine, when rotation speeds are different while loads are the same in an operation range in which the compression self-ignition combustion is performed, a compression end temperature Tx, which is a cylinder temperature just before an air-fuel mixture self-ignites, is raised on a high rotation speed side as compared with a low rotation speed side. As control for that purpose, for instance, an internal EGR amount is increased on the high rotation speed side as compared with the low rotation speed side to raise a compression initial temperature T0 which is a cylinder temperature at start of a compression stroke. COPYRIGHT: (C)2011,JPO&INPIT |
| format | Patent |
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SOLUTION: In the engine, in which compression self-ignition combustion under an air-fuel ratio leaner than the theoretical air-fuel ratio is allowed to be performed at least in a low load range of the engine, when rotation speeds are different while loads are the same in an operation range in which the compression self-ignition combustion is performed, a compression end temperature Tx, which is a cylinder temperature just before an air-fuel mixture self-ignites, is raised on a high rotation speed side as compared with a low rotation speed side. As control for that purpose, for instance, an internal EGR amount is increased on the high rotation speed side as compared with the low rotation speed side to raise a compression initial temperature T0 which is a cylinder temperature at start of a compression stroke. 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SOLUTION: In the engine, in which compression self-ignition combustion under an air-fuel ratio leaner than the theoretical air-fuel ratio is allowed to be performed at least in a low load range of the engine, when rotation speeds are different while loads are the same in an operation range in which the compression self-ignition combustion is performed, a compression end temperature Tx, which is a cylinder temperature just before an air-fuel mixture self-ignites, is raised on a high rotation speed side as compared with a low rotation speed side. As control for that purpose, for instance, an internal EGR amount is increased on the high rotation speed side as compared with the low rotation speed side to raise a compression initial temperature T0 which is a cylinder temperature at start of a compression stroke. 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SOLUTION: In the engine, in which compression self-ignition combustion under an air-fuel ratio leaner than the theoretical air-fuel ratio is allowed to be performed at least in a low load range of the engine, when rotation speeds are different while loads are the same in an operation range in which the compression self-ignition combustion is performed, a compression end temperature Tx, which is a cylinder temperature just before an air-fuel mixture self-ignites, is raised on a high rotation speed side as compared with a low rotation speed side. As control for that purpose, for instance, an internal EGR amount is increased on the high rotation speed side as compared with the low rotation speed side to raise a compression initial temperature T0 which is a cylinder temperature at start of a compression stroke. COPYRIGHT: (C)2011,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING WEAPONS |
| title | METHOD AND APPARATUS FOR CONTROLLING ENGINE |
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