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    • 7. 发明专利
    • COMPRESSION RATIO CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
    • JPH0192538A
    • 1989-04-11
    • JP24999687
    • 1987-10-05
    • TOYOTA MOTOR CORP
    • KATO KENJINARUOKA TAKAOIWASAKI EIJI
    • F02D15/04F02B23/00F02B75/36
    • PURPOSE:To aim at preventing torque shock due to abrupt change in compression ratio during transition operation of an internal combustion engine by compensating a desired compression ratio such as to reduce the absolute value of the difference between the desired compression ratio of the internal combustion engine and an actual compression ratio thereof. CONSTITUTION:An internal combustion engine 1 incorporates a compression ratio changing mechanism 2 for changing over the compression ratio of the engine over several stages. In this arrangement, there are provided a means 3 for detecting the operating condition of the internal combustion engine 3, and a means 4 for setting a desired compression ratio of the internal combustion engine 1 in accordance with the operating condition detected by means 3. Further, there is provided a means 5 for computing a variation in the difference between the desired compression ration set by the means 4 and an actual compression ratio of the internal combustion engine 1. Further, there is provided a means 6 for compensating the desired compression ratio to decrease the absolute value of the above-mentioned difference. Further, there is provided a means 7 for controlling the compression ratio changing mechanism 2 to obtain the desired compression ratio compensated by the means 6.
    • 8. 发明专利
    • Piston for internal-combustion engine
    • 内燃机活塞
    • JPS59160061A
    • 1984-09-10
    • JP3296883
    • 1983-03-02
    • Ishikawa Gasket KkIsuzu Motors Ltd
    • UDAGAWA TSUNEKAZUHIRAMATSU SEIJIINAMURA SUSUMUKANEHARA MOTOYASU
    • F02B75/36F02B3/06F02F3/00F02F3/12F16J1/00
    • F02F3/12F02B3/06F02B2275/14
    • PURPOSE:To reduce a dead space as well as the smoke of exhaust gas by a method wherein a porous layer is provided on the top of the main body of the piston for the direct-injection type diesel engine by a material having elastic power and excellent in heat resistant property. CONSTITUTION:The top 4a of the piston 4 is formed with the recess 7 of a combustion chamber 6 while the porous layer 8 of elastic foamed metal is provided integrally on the top of the piston around the recess in such a manner that it is abutted against the lower surface 3a of a cylinder head 3. When the piston 4 is risen and arrives at the position of the upper dead point thereof, the porous layer 8 at the top of the piston collides against or contacts with the lower surface 3a of the cylinder head 3, however, the porous layer 8 is pressed and deformed. In this case, the voids of the porous layer 8 are filled with carbon in combustion gas and the layer reduces dead volume since the material thereof becomes dense. According to this method, the smoke of the exhaust gas of the engine may be reduced and the output of the engine may be increased.
    • 目的:通过利用具有弹性力的材料在直喷式柴油发动机的活塞的主体的顶部设置多孔层的方法来减少废气的排气和废气, 耐热性能。 构成:活塞4的顶部4a形成有燃烧室6的凹部7,而弹性泡沫金属的多孔层8一体地设置在活塞周围的凹部周围,使得其抵靠 气缸盖3的下表面3a。当活塞4上升并到达其上死点的位置时,活塞顶部的多孔层8与气缸的下表面3a碰撞或接触 头3,然而,多孔层8被压制和变形。 在这种情况下,多孔层8的空隙在燃烧气体中被填充碳,并且该层由于其材料变得致密而减少死体积。 根据该方法,可以减少发动机的排气的烟雾,并且可以增加发动机的输出。