公开(公告)号：US11441468B2

公开(公告)日：2022-09-13

申请号：US17321789

申请日：2021-05-17

申请人： Cummins Inc.

发明人： Steven M. Bellinger ,  Benjamin Bailey ,  Jonathan S. Stichter ,  Julio E. Munoz ,  Kalkidan Said

IPC分类号： F01N3/20 ,  F16H45/02 ,  F16D28/00 ,  B60K17/02 ,  B60K17/10 ,  F16H47/06 ,  F16H45/00

摘要： A vehicle system includes an engine, a transmission including a torque converter, a clutch configured to selectably couple and decouple the torque converter, and a gearset, a selective catalytic reduction (SCR) exhaust aftertreatment system. An electronic control system may be operatively coupled with the engine, the electronically controllable clutch, and the SCR exhaust aftertreatment system. The electronic control system is configured to evaluate whether an SCR catalyst temperature satisfies at least one minimum temperature criterion, in response to the SCR catalyst temperature satisfying the minimum temperature criterion, permit a neutral at stop operation wherein the electronically controllable clutch is controlled to selectably decouple the torque converter and the one or more gears at least in part in response to the vehicle system being in a stopped state, and in response to the SCR catalyst temperature not satisfying the minimum temperature criterion, prevent the neutral at stop operation.

公开(公告)号：US20210355852A1

公开(公告)日：2021-11-18

申请号：US17321789

申请日：2021-05-17

申请人： Cummins Inc.

发明人： Steven M. Bellinger ,  Benjamin Bailey ,  Jonathan S. Stichter ,  Julio E. Munoz ,  Kalkidan Said

IPC分类号： F01N3/20 ,  F16H45/02 ,  F16D28/00 ,  B60K17/02 ,  F16H47/06 ,  B60K17/10

摘要： A vehicle system includes an engine, a transmission including a torque converter, a clutch configured to selectably couple and decouple the torque converter, and a gearset, a selective catalytic reduction (SCR) exhaust aftertreatment system. An electronic control system may be operatively coupled with the engine, the electronically controllable clutch, and the SCR exhaust aftertreatment system. The electronic control system is configured to evaluate whether an SCR catalyst temperature satisfies at least one minimum temperature criterion, in response to the SCR catalyst temperature satisfying the minimum temperature criterion, permit a neutral at stop operation wherein the electronically controllable clutch is controlled to selectably decouple the torque converter and the one or more gears at least in part in response to the vehicle system being in a stopped state, and in response to the SCR catalyst temperature not satisfying the minimum temperature criterion, prevent the neutral at stop operation.