公开(公告)号：US06170459B2

公开(公告)日：2001-01-09

申请号：US09576906

申请日：2000-05-23

申请人： Takahiko Ono ,  Hiromichi Hisato ,  Hirofumi Ohuchi

发明人： Takahiko Ono ,  Hiromichi Hisato ,  Hirofumi Ohuchi

IPC分类号： F02B500

CPC分类号： F02D41/3836 ,  F02D2200/0602 ,  F02D2200/0604 ,  F02D2200/0618 ,  F02D2250/04

摘要： A fuel injection control assembly for a cylinder-injected engine includes a mean fuel pressure calculating element for calculating mean fuel pressure, a fuel pressure regulator for adjusting the fuel pressure, an injection pulse calculating element for calculating an injection pulse duration for an injector based on the mean fuel pressure, and a cycle modifying element for modifying the calculation cycle for the mean fuel pressure in response to the running speed of the engine or of a high-pressure pump, the cycle modifying element setting the calculation cycle to a length greater than or equal to a running cycle of the high-pressure pump to ensure that the number of times that fuel pressure is detected within each calculation cycle of the mean fuel pressure calculating element is greater than or equal to a predetermined number of times.

摘要翻译： 用于气缸喷射发动机的燃料喷射控制组件包括用于计算平均燃料压力的平均燃料压力计算元件，用于调节燃料压力的燃料压力调节器，用于计算喷射器的喷射脉冲持续时间的喷射脉冲计算元件，基于 平均燃料压力和循环修改元件，用于响应于发动机或高压泵的运行速度来修改平均燃料压力的计算周期，循环修改元件将计算周期设置为大于 或等于高压泵的运行循环，以确保在平均燃料压力计算元件的每个计算周期内检测到的燃料压力的次数大于或等于预定次数。

公开(公告)号：US06378501B1

公开(公告)日：2002-04-30

申请号：US09576201

申请日：2000-05-23

申请人： Hiromichi Hisato ,  Takeshi Kitao ,  Takahiko Ono ,  Keiichi Enoki

发明人： Hiromichi Hisato ,  Takeshi Kitao ,  Takahiko Ono ,  Keiichi Enoki

IPC分类号： F02M4100

CPC分类号： F02D41/3863 ,  F02D2041/1422 ,  F02D2041/389 ,  F02D2200/0602 ,  F02D2250/31

摘要： A device for controlling the fuel pressure in a direct cylinder fuel injection engine, which suppresses the over-shooting or under-shooting of fuel pressure under a condition in which the fuel pressure is changing, in order to improve the response and stability. A control means 20A controls the fuel pressure by feedback so that a real fuel pressure PF comes into agreement with a target fuel pressure PFo, and includes a means 204 for operating the fuel pressure correction amount for variably setting a control gain for controlling the fuel pressure by feedback, the means for operating the fuel pressure correction amount so working as to change the control gain when the target fuel pressure has changed by more than a predetermined amount from a first control gain for when the fuel pressure remains steady over to a second control gain for when the fuel pressure changes.

摘要翻译： 一种用于控制直接气缸燃料喷射发动机中的燃料压力的装置，其抑制在燃料压力变化的条件下燃油压力的过度喷射或欠喷射，以便改善响应和稳定性。 控制装置20A通过反馈来控制燃料压力，使得实际燃料压力PF与目标燃料压力PFo一致，并且包括用于操作燃料压力校正量的装置204，用于可变地设定用于控制燃料压力的控制增益 通过反馈，用于操作燃料压力校正量的装置用于当目标燃料压力从燃料压力保持稳定到第二控制的第一控制增益改变超过预定量时改变控制增益 燃油压力变化时的增益。

公开(公告)号：US06763657B2

公开(公告)日：2004-07-20

申请号：US10244422

申请日：2002-09-17

申请人： Satoshi Wachi ,  Hiromichi Hisato

发明人： Satoshi Wachi ,  Hiromichi Hisato

IPC分类号： F01N300

CPC分类号： F01N3/0814 ,  F01N3/0871 ,  F02D41/0245 ,  F02D41/027 ,  F02D41/1446 ,  F02D41/1454 ,  F02D41/1481 ,  F02D41/187 ,  F02D2200/0802 ,  Y02T10/26

摘要： An air-fuel ratio of exhaust gas flowing into a NOx absorber catalyst is compulsorily changed from a lean side to a rich side to release NOx absorbed by the NOx absorber catalyst. The Nox is reduced at the same time. If temperature of the NOx absorber catalyst is lower than a first predetermined temperature T1, temporaral change of the air-fuel ratio of the exhaust gas to the rich side for the purpose of releasing and reducing NOx is inhibited, and if temperature of the NOx absorber catalyst is higher than the first predetermined temperature T1 and lower than a second predetermined temperature T2, at the time of changing temporarily the air-fuel ratio of the exhaust gas to the rich side for the purpose of releasing and reducing NOx, timing of changing the air-fuel ratio and the set air-fuel ratio are changed depending on the temperature of the NOx absorber catalyst.

摘要翻译： 流入NOx吸收剂催化剂的排气的空燃比强制地从稀侧变为富侧，以释放由NOx吸收剂催化剂吸收的NOx。 Nox在同一时间减少。 如果NOx吸收剂催化剂的温度低于第一预定温度T1，则为了释放和还原NOx目的，排气到富面的空燃比的暂时变化被抑制，并且如果NOx吸收剂的温度 催化剂高于第一预定温度T1且低于第二预定温度T2时，为了释放和还原NOx，将废气的空燃比临时改变为浓侧，此时改变 空燃比和设定空燃比根据NOx吸收剂催化剂的温度而变化。

公开(公告)号：US07089730B2

公开(公告)日：2006-08-15

申请号：US10330135

申请日：2002-12-30

申请人： Satoshi Wachi ,  Hiromichi Hisato ,  Li Liu

发明人： Satoshi Wachi ,  Hiromichi Hisato ,  Li Liu

IPC分类号： F01N3/00

CPC分类号： F01N3/0842 ,  F01N3/0814 ,  F01N13/009 ,  F01N2430/06 ,  F01N2550/03 ,  F01N2570/14 ,  F02D41/0275 ,  F02D41/1446 ,  F02D41/1454 ,  F02D41/1462 ,  F02D41/1475 ,  F02D2200/0806 ,  F02D2200/0808 ,  Y02A50/2344

摘要： To obtain an exhaust gas purification method for an internal combustion engine for detecting timing at which an inflow NOx amount flowing into an NOx absorption catalyst exceeds an NOx amount processable by the NOx absorption catalyst, and enriches the air/fuel ratio to prevent deterioration of the exhaust gas and maintain good fuel consumption. Based on an NOx amount absorbed in the NOx absorption catalyst and a maximum NOx absorption amount NOx of the absorption catalyst, a processable NOx amount processable by the NOx absorption catalyst per unit time is calculated and compared with the inflow NOx amount entering the NOx absorption catalyst per unit time, and when it is determined that the inflow NOx amount is greater, the air/fuel ratio is switched to rich.

公开(公告)号：US06499474B2

公开(公告)日：2002-12-31

申请号：US09900134

申请日：2001-07-09

申请人： Satoshi Wachi ,  Hideaki Katashiba ,  Li Liu ,  Hiromichi Hisato

发明人： Satoshi Wachi ,  Hideaki Katashiba ,  Li Liu ,  Hiromichi Hisato

IPC分类号： F02D4130

CPC分类号： F02D41/345 ,  F02D41/1454 ,  F02D41/1474 ,  F02D41/187 ,  F02D2041/0092 ,  Y02T10/44

摘要： An air/fuel ratio correction cylinder determining section 25 specifies, based on the peak phase, a cylinder for which an air/fuel ratio is to be corrected. A cylinder-specific air/fuel ratio correcting section in the form of respective cylinder correcting sections 31 through 34 corrects an amount of fuel to be supplied to a cylinder which becomes an air/fuel ratio correction target. A cylinder for which an air/fuel ratio deviates from the remaining cylinders is specified as a fuel amount correction target based on a change in the output value of the air/fuel ratio sensor.

摘要翻译： 空燃比校正气缸判定部25基于峰值相位来指定要校正空气/燃料比的气缸。 各气缸校正部31〜34形式的圆筒特定的空燃比校正部，校正供给到成为空/燃比修正对象的气缸的燃料量。 基于空/燃比传感器的输出值的变化，将空气/燃料比与剩余气缸偏离的气缸指定为燃料量校正对象。