公开(公告)号：US20110114042A1

公开(公告)日：2011-05-19

申请号：US12943766

申请日：2010-11-10

申请人： Takeru Hamakawa ,  Kenji Sato ,  Shigeo Okui ,  Naoto Kodama

发明人： Takeru Hamakawa ,  Kenji Sato ,  Shigeo Okui ,  Naoto Kodama

IPC分类号： F02F1/10

CPC分类号： F02F1/14 ,  F01P2003/021

摘要： A spacer covers intermediate portions of respective cylinder bores in a depth direction of a water jacket throughout the entire peripheries of the intermediate portions in the peripheral direction. Accordingly, the intermediate portion of each cylinder bore becomes higher in temperature than any other portion, and is thermally expanded. Thereby, the clearance between the cylinder bore and the corresponding piston increases. Thus, the friction decreases to improve fuel efficiency of an internal combustion engine. Furthermore, since the temperature of oil lubricating the intermediate portion of the cylinder bore rises, and the viscosity decreases. Accordingly, the effect of friction reduction is enhanced more. Furthermore, upper and lower portions of the cylinder bores in a cylinder axis direction are sufficiently cooled. Therefore, the cooling performance of a top part and a skirt part of each piston, which tends to become higher in temperature, is secured. Accordingly, overheat can be prevented.

摘要翻译： 间隔件在圆周方向上的中间部分的整个周边处覆盖水套的深度方向上的相应气​​缸孔的中间部分。 因此，每个气缸孔的中间部分的温度比任何其它部分都变高，并且被热膨胀。 因此，气缸孔与相应活塞之间的间隙增加。 因此，摩擦力降低以提高内燃机的燃料效率。 此外，由于润滑气缸中部的油温上升，粘度降低。 因此，摩擦减少的效果进一步提高。 此外，气缸的缸体轴向的上下部分被充分冷却。 因此，确保了倾向于变得更高温度的每个活塞的顶部和裙部的冷却性能。 因此，可以防止过热。

公开(公告)号：US08667932B2

公开(公告)日：2014-03-11

申请号：US12943766

申请日：2010-11-10

申请人： Takeru Hamakawa ,  Kenji Sato ,  Shigeo Okui ,  Naoto Kodama

发明人： Takeru Hamakawa ,  Kenji Sato ,  Shigeo Okui ,  Naoto Kodama

IPC分类号： F02F1/14 ,  F01P1/02 ,  F02F1/10

CPC分类号： F02F1/14 ,  F01P2003/021

摘要： A spacer covets intermediate portions of respective cylinder bores in a depth direction of a water jacket throughout the entire peripherics of the intermediate portions in the peripheral direction. Accordingly, the intermediate portion of each cylinder bore becomes higher in temperature than any other portion, and is thermally expanded. Thereby, the clearance between the cylinder bore and the corresponding piston increases. Thus, the friction decreases to improve fuel efficiency of an internal combustion engine. Furthermore, the temperature of oil lubricating the intermediate portion of the cylinder bore rises, and the viscosity decreases. Accordingly, the effect of friction reduction is enhanced more. Furthermore, upper and lower portions of the cylinder bores in a cylinder axis direction are sufficiently cooled. Therefore, the cooling performance of a top part and a skirt part of each piston, which tends to become higher in tempera lure, is secured. Accordingly, overheat can be prevented.

摘要翻译： 间隔件在圆周方向上的中间部分的整个周边处，在水套的深度方向上夹着相应气缸孔的中间部分。 因此，每个气缸孔的中间部分的温度比任何其它部分都变高，并且被热膨胀。 因此，气缸孔与相应活塞之间的间隙增加。 因此，摩擦力降低以提高内燃机的燃料效率。 此外，润滑汽缸孔中间部分的油的温度升高，粘度降低。 因此，摩擦减少的效果进一步提高。 此外，气缸的缸体轴向的上下部分被充分冷却。 因此，确保了倾向于变得更高温度的每个活塞的顶部和裙部的冷却性能。 因此，可以防止过热。

公开(公告)号：US20110114043A1

公开(公告)日：2011-05-19

申请号：US12940759

申请日：2010-11-05

申请人： Takeru Hamakawa ,  Shigeo Okui ,  Naoto Kodama ,  Atsushi Nakajima

发明人： Takeru Hamakawa ,  Shigeo Okui ,  Naoto Kodama ,  Atsushi Nakajima

IPC分类号： F02B75/18

CPC分类号： F02F1/14 ,  F01P2003/021

摘要： A height of a spacer which is arranged inside a water jacket formed to surround peripheries of cylinder bores of a cylinder block of an internal combustion engine is made to be lower by a step in an intermediate portion thereof in a cylinder row line direction. Consequently, among end-portion cylinder bores having a lower temperature and being situated at opposite end portions in the cylinder row line direction and intermediate cylinder bores being other than the end-portion cylinder bores and having a higher temperature, a cooling performance of the intermediate cylinder bores is higher than that of the end-portion cylinder bores. Therefore, all the temperatures of the respective cylinder bores can be made uniform. A similar operation effect can be obtained alternatively by making a thickness of the spacer thinner in portions facing the intermediate cylinder bores and thicker in portions facing the end-portion cylinder bores.

摘要翻译： 在气缸排列线方向上的中间部分的台阶上，使位于内套筒的气缸体的缸壁周围的水套内部配置的间隔件的高度较低。 因此，在具有较低温度并且位于气缸排线方向上的相对端部的端部气缸孔和中间气缸孔中，除了端部气缸孔之外并具有较高温度，中间体的冷却性能 气缸孔高于端部缸孔。 因此，能够使各气缸孔的全部温度均匀。 可以通过使间隔物的厚度在面向中间圆筒孔的部分中更薄并且面向端部圆筒孔的部分更厚，可以获得类似的操作效果。

公开(公告)号：US08539916B2

公开(公告)日：2013-09-24

申请号：US12940759

申请日：2010-11-05

申请人： Takeru Hamakawa ,  Shigeo Okui ,  Naoto Kodama ,  Atsushi Nakajima

发明人： Takeru Hamakawa ,  Shigeo Okui ,  Naoto Kodama ,  Atsushi Nakajima

IPC分类号： F02F1/10

CPC分类号： F02F1/14 ,  F01P2003/021

摘要： A height of a spacer which is arranged inside a water jacket formed to surround peripheries of cylinder bores of a cylinder block of an internal combustion engine is made to be lower by a step in an intermediate portion thereof in a cylinder row line direction. Consequently, among end-portion cylinder bores having a lower temperature and being situated at opposite end portions in the cylinder row line direction and intermediate cylinder bores being other than the end-portion cylinder bores and having a higher temperature, a cooling performance of the intermediate cylinder bores is higher than that of the end-portion cylinder bores. Therefore, all the temperatures of the respective cylinder bores can be made uniform. A similar operation effect can be obtained alternatively by making a thickness of the spacer thinner in portions facing the intermediate cylinder bores and thicker in portions facing the end-portion cylinder bores.

摘要翻译： 在气缸排列线方向上的中间部分的台阶上，使位于内套筒的气缸体的缸壁周围的水套内部配置的间隔件的高度较低。 因此，在具有较低温度并且位于气缸排线方向上的相对端部的端部气缸孔和中间气缸孔中，除了端部气缸孔之外并具有较高温度，中间体的冷却性能 气缸孔高于端部缸孔。 因此，能够使各气缸孔的全部温度均匀。 可以通过使间隔物的厚度在面向中间圆筒孔的部分中更薄并且面向端部圆筒孔的部分更厚，可以获得类似的操作效果。