公开(公告)号：US20180230919A1

公开(公告)日：2018-08-16

申请号：US15918284

申请日：2018-03-12

Applicant: Tula Technology, Inc.

Inventor： Masaki NAGASHIMA ,  Mohammad R. PIRJABERI ,  Louis J. SERRANO ,  Xin YUAN ,  John W. PARSELS

IPC: F02D41/00 ,  F02D41/14 ,  F02D41/30

CPC classification number: F02D41/0087 ,  F02D41/0002 ,  F02D41/1498 ,  F02D41/3058 ,  F02D41/307 ,  F02D2041/0012 ,  F02D2041/1432 ,  F02D2250/24

Abstract: A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a dynamic firing level modulation manner. A smoothing torque is determined by adaptive control that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.

公开(公告)号：US20170370804A1

公开(公告)日：2017-12-28

申请号：US15701155

申请日：2017-09-11

Applicant: Tula Technology Inc.

Inventor： Shikui Kevin CHEN ,  Masaki NAGASHIMA ,  Li-Chun CHIEN

IPC: G01M15/11 ,  F02D35/02 ,  F02D41/22 ,  F02D41/00

CPC classification number: G01M15/11 ,  F02D35/024 ,  F02D41/0087 ,  F02D41/0097 ,  F02D41/22 ,  F02D2200/1012 ,  F02D2200/1015

Abstract: A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. There is an attempt to fire a target working chamber during the target firing opportunity. A change in an engine parameter (e.g., crankshaft angular acceleration) is measured during the window. A model (e.g., a pressure model) is used to help determine an expected change in the engine parameter during the target firing opportunity. Based on a comparison of the expected change and the measured change in the engine parameter, a determination is made as to whether an engine error (e.g., misfire) has occurred.

公开(公告)号：US20160109330A1

公开(公告)日：2016-04-21

申请号：US14880652

申请日：2015-10-12

Applicant: Tula Technology Inc.

Inventor： Shikui Kevin CHEN ,  Masaki NAGASHIMA ,  Li-Chun CHIEN

IPC: G01M15/11 ,  F02D41/22 ,  F02D35/02

CPC classification number: G01M15/11 ,  F02D35/024 ,  F02D41/0087 ,  F02D41/0097 ,  F02D41/22 ,  F02D2200/1012 ,  F02D2200/1015

Abstract: A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. There is an attempt to fire a target working chamber during the target firing opportunity. A change in an engine parameter (e.g., crankshaft angular acceleration) is measured during the window. A model (e.g., a pressure model) is used to help determine an expected change in the engine parameter during the target firing opportunity. Based on a comparison of the expected change and the measured change in the engine parameter, a determination is made as to whether an engine error (e.g., misfire) has occurred.

Abstract translation: 描述了用于检测失火和其它引擎相关错误的各种方法和装置。 在一个方面，将窗口分配给目标工作室的目标发射机会。 在目标发射机会期间试图射击目标工作室。 在窗口期间测量发动机参数的改变（例如，曲轴角加速度）。 使用模型（例如，压力模型）来帮助确定目标发射机会期间的发动机参数的预期变化。 基于预期变化和发动机参数的测量变化的比较，确定是否发生了发动机错误（例如失火）。