公开(公告)号：US10138860B2

公开(公告)日：2018-11-27

申请号：US15697639

申请日：2017-09-07

Applicant: Tula Technology, Inc.

Inventor： Masaki Nagashima ,  Mohammad R. Pirjaberi ,  Louis J. Serrano

IPC: F02P5/145 ,  F02D13/02 ,  F02D37/02 ,  F02D41/00 ,  F02D17/02 ,  F02D11/10 ,  F02D41/14

Abstract: A variety of methods and arrangements are described for controlling transitions between effective firing fractions during dynamic firing level modulation operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the effective firing fractions during transitions such that the resulting changes in the effective firing fraction better track cylinder air charge changing dynamics associated with the transition.

公开(公告)号：US09777658B2

公开(公告)日：2017-10-03

申请号：US15147690

申请日：2016-05-05

Applicant: Tula Technology, Inc.

Inventor： Masaki Nagashima ,  Mohammad R. Pirjaberi ,  Louis J. Serrano

IPC: F02D41/04 ,  F02D41/14 ,  F02D41/18

CPC classification number: F02D41/1401 ,  F02D41/0002 ,  F02D41/0087 ,  F02D41/04 ,  F02D41/18 ,  F02D2041/001 ,  F02D2041/141 ,  F02D2200/0406 ,  F02D2200/1004 ,  F02D2250/21 ,  Y02T10/42

Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help reduce undesirable NVH consequences and otherwise smooth the transitions. In general, both feed forward and feedback control are utilized in the determination of the firing fractions during transitions such that the resulting changes in the firing fraction better track cylinder air charge changing dynamics associated with the transition.

公开(公告)号：US09512794B2

公开(公告)日：2016-12-06

申请号：US14992779

申请日：2016-01-11

Applicant: Tula Technology, Inc.

Inventor： Louis J. Serrano ,  Xin Yuan ,  John W. Parsels ,  Mohammad R. Pirjaberi ,  Mark A. Wilcutts ,  Masaki Nagashima

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

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

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 skip fire manner. A smoothing torque is determined 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 skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.

Abstract translation: 描述了用于减少跳火消防车控制系统中的噪声，振动和粗糙度（NVH）的各种方法和装置。 在一个方面，使用点火顺序来以跳火方式操作发动机。 确定通过能量存储/释放装置施加到动力系的平滑扭矩。 平滑扭矩被布置成至少部分抵消由跳过火焰点火序列产生的扭矩的变化。 还描述了与上述操作相关的各种方法，动力系统控制器，布置和计算机软件。