公开(公告)号：US4982622A

公开(公告)日：1991-01-08

申请号：US377428

申请日：1989-07-10

申请人： Masanari Yamamoto ,  Mikio Iwase ,  Toshihiro Tomino

发明人： Masanari Yamamoto ,  Mikio Iwase ,  Toshihiro Tomino

IPC分类号： F16H59/72 ,  F16H61/00 ,  F16H61/02 ,  F16H61/04 ,  F16H61/06

CPC分类号： F16H61/061 ,  F16H2061/0096 ,  F16H2061/0255 ,  F16H2061/0488 ,  F16H2312/02 ,  F16H59/72 ,  Y10T477/653 ,  Y10T477/689 ,  Y10T477/6895 ,  Y10T477/693964 ,  Y10T477/693973

摘要： A pressure control device of an automatic transmission in which duty ratio of speed gear changing solenoid is controlled, when a shift is done from D, 2 or L range to P, R or N range and back again to D, 2 or L range, such that the duty ratio is maintained at 0% to ensure a sufficiently large apply flow rate and then increased followed by a progressive decrease towards 0%. The time over which the duty ratio is maintained at 0% is shortened in an amount which is determined in accordance with the time elapsed till the shift back to the D, 2 or L range, whereby an abrupt application of the engaging hydraulic pressure to a clutch is avoided to minimize a shock which is generated at the time of shifting. When a shift is done for the first time from N to D range after turning on of the ignition switch, the time over which the duty ratio is maintained at 0% is prolonged so as to increase the rate of supply of the hydraulic oil to oil passages and hydraulic pistons of clutches for operating rotational elements of the automatic transmission, so that sufficiently large quantity of oil is maintained at the time of the first shift from N to D range shortly after the start of the engine, thereby minimizing a shock.

摘要翻译： 在从D，2或L范围向P，R或N范围进行换档并再次回到D，2或L范围时，控制变速螺线管的占空比的自动变速器的压力控制装置， 使得占空比保持在0％以确保足够大的施加流速，然后增加，随后逐渐减小到0％。 占空比保持在0％的时间缩短到根据经过的时间直到D，2或L范围确定的量，由此将接合液压突然施加到 避免了离合器，以减少在换档时产生的冲击。 当点火开关接通后，从N到D范围首次进行换档时，占空比保持在0％的时间会延长，从而提高液压油供油量 用于操作自动变速器的旋转元件的离合器的通道和液压活塞，使得在发动机启动之后不久第一次从N到D范围内的时间维持足够大量的油，从而使冲击最小化。

公开(公告)号：US6093263A

公开(公告)日：2000-07-25

申请号：US104224

申请日：1998-06-25

申请人： Keizo Kobayashi ,  Kazunori Ishikawa ,  Kazuhisa Ozaki ,  Toshihiro Tomino ,  Mikio Iwase ,  Hiroshi Kato ,  Tatsuo Tozuka ,  Atsushi Tabata ,  Kagenori Fukumura ,  Yasuo Hojo ,  Shoichi Sayo ,  Hideki Miyata

发明人： Keizo Kobayashi ,  Kazunori Ishikawa ,  Kazuhisa Ozaki ,  Toshihiro Tomino ,  Mikio Iwase ,  Hiroshi Kato ,  Tatsuo Tozuka ,  Atsushi Tabata ,  Kagenori Fukumura ,  Yasuo Hojo ,  Shoichi Sayo ,  Hideki Miyata

IPC分类号： F16H55/06 ,  C21D9/32 ,  C22C38/00 ,  C22C38/22 ,  C22C38/24 ,  C23C8/26 ,  C21D1/06

CPC分类号： C22C38/22 ,  C21D9/32 ,  C22C38/24 ,  C23C8/26

摘要： A gear having high pitching resistance, sufficient surface hardness, sufficient hardened depth, high abrasion resistance, high breakage resistance, high fatigue resistance, and low gear noises. A material equivalent to JIS-SCM420 is soft nitrided for two hours in a mixture gas containing 45 to 65 volume % of residual NH.sub.3 at a gas temperature of 530 to 565.degree. C., thus producing a compound layer having a hardness equal to or higher than that of the material plus Hv 50 and a thickness of 200 .mu.m or more.

摘要翻译： 具有高俯仰阻力，足够的表面硬度，足够的硬化深度，高耐磨性，高耐断裂性，高抗疲劳性和低齿轮噪声的齿轮。 将等价于JIS-SCM420的材料在530〜565℃的气体温度下，在含有45〜65体积％残留NH 3的混合气体中软氮化2小时，由此生成硬度等于或等于 比材料加上Hv 50，厚度200μm以上。