公开(公告)号：US20170145927A1

公开(公告)日：2017-05-25

申请号：US14950275

申请日：2015-11-24

申请人： John R. Bucknell ,  Aymail Ismail ,  Ethan E. Bayer ,  Drushan Mavalankar

发明人： John R. Bucknell ,  Aymail Ismail ,  Ethan E. Bayer ,  Drushan Mavalankar

IPC分类号： F02D13/02 ,  F01L1/22

CPC分类号： F02D13/02 ,  F01L1/18 ,  F01L1/22 ,  F01L1/344 ,  F01L13/0036 ,  F01L2001/186 ,  F01L2800/10 ,  F01L2800/14 ,  F01L2820/043 ,  F02D13/0207 ,  F02D2041/001 ,  F02D2041/002 ,  F02D2200/0406 ,  F02D2200/0411 ,  F02D2250/21 ,  F02D2250/22 ,  F02M26/48 ,  Y02T10/18

摘要： A control technique for an engine having a two-step variable valve lift system includes a controller receiving a pressure in an intake manifold of the engine from a manifold absolute pressure (MAP) sensor and a position of an EGR valve of the engine from an exhaust gas recirculation (EGR) sensor. In response to the controller detecting an upcoming HL-to-LL valve state transition, a set of airflow actuators of the engine is controlled, based on the intake manifold pressure and the EGR valve position, to generate a first torque reserve. In response to generating the first torque reserve, the controller then commands the HL-to-LL transition and depletion of the first torque reserve during the HL-to-LL transition to mitigate torque disturbance associated with this transition.

公开(公告)号：US09765705B2

公开(公告)日：2017-09-19

申请号：US14950275

申请日：2015-11-24

申请人： John R Bucknell ,  Aymail Ismail ,  Ethan E Bayer ,  Drushan Mavalankar

发明人： John R Bucknell ,  Aymail Ismail ,  Ethan E Bayer ,  Drushan Mavalankar

IPC分类号： F02D13/02 ,  F01L1/22

CPC分类号： F02D13/02 ,  F01L1/18 ,  F01L1/22 ,  F01L1/344 ,  F01L13/0036 ,  F01L2001/186 ,  F01L2800/10 ,  F01L2800/14 ,  F01L2820/043 ,  F02D13/0207 ,  F02D2041/001 ,  F02D2041/002 ,  F02D2200/0406 ,  F02D2200/0411 ,  F02D2250/21 ,  F02D2250/22 ,  F02M26/48 ,  Y02T10/18

摘要： A control technique for an engine having a two-step variable valve lift system includes a controller receiving a pressure in an intake manifold of the engine from a manifold absolute pressure (MAP) sensor and a position of an EGR valve of the engine from an exhaust gas recirculation (EGR) sensor. In response to the controller detecting an upcoming HL-to-LL valve state transition, a set of airflow actuators of the engine is controlled, based on the intake manifold pressure and the EGR valve position, to generate a first torque reserve. In response to generating the first torque reserve, the controller then commands the HL-to-LL transition and depletion of the first torque reserve during the HL-to-LL transition to mitigate torque disturbance associated with this transition.