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    • 21. 发明专利
    • IN-CYLINDER INJECTION TYPE INTERNAL COMBUSTION ENGINE
    • JPH09287527A
    • 1997-11-04
    • JP10167596
    • 1996-04-23
    • TOYOTA MOTOR CORP
    • YANAGIHARA HIROMICHI
    • F02B3/08F01N3/00F02D21/08F02D41/02F02D41/04F02M25/07
    • PROBLEM TO BE SOLVED: To reduce the generation quantity of NOx and a soot to about zero by setting up an exhaust gas recirculating rate during the high load operation of an engine to a specified value in an in-cylinder injection type internal combustion engine where a fuel is injected into a combustion chamber at a specified angle before a compression dead top center, and the average grain diameter of a then injected fuel is specified. SOLUTION: Feul is injected into a combustion chamber 5 from a fuel injection valve 10 provided at the top of a combustion chamber 5 during a compression stroke or an intake stroke before about 60 degrees in front of a compression upper dead center, and then average grain diameter of the fuel is set up to be larger than a grain diameter in the case where grain temperature attains the boiling point of a main fuel component decided on then pressure at about compression upper dead point or after the said point. After then, until reaching the about compression upper dead point, the evaporation due to boiling of fuel from the fuel grain is checked, and the grained fuel is boiledly evaporated after the about compression upper dead point to brun the fuel. In this case an exhaust gas recirculating rate during the high load operation of the engine is controlled about 40% or more by an exhaust gas recirculating control valve 16 to check the generation of NOx and a soot.
    • 22. 发明专利
    • COMPRESSED IGNITION TYPE INTERNAL COMBUSTION ENGINE AND ITS COMBUSTING METHOD
    • JPH07317588A
    • 1995-12-05
    • JP10856094
    • 1994-05-23
    • TOYOTA MOTOR CORP
    • SATO YASUOYANAGIHARA HIROMICHIKAWAGUCHI AKIO
    • F02B3/08F02B3/06F02B23/02F02D41/38F02D41/40F02M47/00F02M61/18
    • PURPOSE:To suppress generation of smokes and NOx to substantially zero by injecting the fuel into the combustion chamber at the specified timings, specifying the mean particle size of the fuel injected, allowing the fuel in particle state to boil and evaporate after the compressive upper dead center approximately, and thereby performing the fuel ignition and combustion. CONSTITUTION:An internal combustion engine is structured so that the fuel spreading in the form of thin film is injected from a fuel injection valve 10 furnished in the combustion chamber 5 into the whole space of the combustion chamber 5, wherein the fuel injection should take place under the compression stroke 60deg. before the compressive upper dead center approximately or under the suction stroke, and thereby the injected fuel is dispersed in the whole space of the combustion chamber 5. The particle temp. of mean particle size at fuel injection is made greater than the particle size to attain the boiling point of the main fuel component determined by the pressure at the compressive upper dead center approximately or after the compressive upper dead center so that evaporation of the fuel due to boiling from the particle state is hindered until the compressive upper dead center is attained approximately after the injection. After the compressive upper dead center, the fuel in the particle from is boiled and evaporated so that the fuel ignition and combustion are conducted.