公开(公告)号：US09650971B2

公开(公告)日：2017-05-16

申请号：US13963686

申请日：2013-08-09

Applicant: Tula Technology, Inc.

Inventor： Mohammad R. Pirjaberi ,  Steven E. Carlson ,  Louis J. Serrano ,  Xin Yuan ,  Li-Chun Chien ,  Adya S. Tripathi

IPC: F02D17/02 ,  F02D41/00 ,  F02D41/02 ,  F02D11/10 ,  F02D41/24

CPC classification number: F02D41/00 ,  F02D11/105 ,  F02D17/02 ,  F02D41/0087 ,  F02D41/0225 ,  F02D41/2422 ,  F02D2250/18

Abstract: The described embodiments relate generally to skip fire control of internal combustion engines and particularly to mechanisms for determining a desired operational firing fraction. In some embodiments, a firing fraction determining unit is arranged to determine a firing fraction suitable for delivering a requested engine output. The firing fraction determining unit may utilize data structures such as lookup tables in the determination of the desired firing fraction. In one aspect the desired engine output and one or more operational power train parameters such as current engine speed, are used as indices to a lookup table used to select a desired firing fraction. In other embodiments, additional indices to the data structure may include any one of: transmission gear; manifold absolute pressure (MAP); manifold air temperature; a parameter indicative of mass air charge (MAC); cam position; cylinder torque output; maximum permissible manifold pressure; vehicle speed; and barometric pressure.

公开(公告)号：US20160377007A9

公开(公告)日：2016-12-29

申请号：US13843567

申请日：2013-03-15

Applicant: TULA TECHNOLOGY, INC.

Inventor： Mark A. WILCUTTS ,  Xin YUAN ,  Joshua P. SWITKES ,  Li-Chun CHIEN ,  Steven E. CARLSON ,  Christopher W. CHANDLER ,  Christopher C. Hand ,  Matthew A. YOUNKINS ,  Adya S. Tripathi

IPC: F02D41/00

CPC classification number: F02D41/0087 ,  F02D41/3058 ,  F02D2200/0614

Abstract: Various methods and arrangements for determining a combustion control parameter for a working chamber in an engine are described. In one aspect, an engine controller includes a firing counter that stores a firing history for the working chamber. A combustion control module is used to determine a combustion control parameter, which is used to help manage combustion in the working chamber. The combustion control parameter is determined based at least in part on the firing history.

Abstract translation: 描述了用于确定发动机中的工作室的燃烧控制参数的各种方法和装置。 一方面，发动机控制器包括存储工作室的击发历史的发射计数器。 燃烧控制模块用于确定燃烧控制参数，其用于帮助管理工作室中的燃烧。 至少部分地基于击发历史来确定燃烧控制参数。

公开(公告)号：US10968841B2

公开(公告)日：2021-04-06

申请号：US16680030

申请日：2019-11-11

Applicant: Tula Technology, Inc.

Inventor： Mohammad R. Pirjaberi ,  Adya S. Tripathi ,  Louis J. Serrano

IPC: F02D17/02 ,  F02D41/02 ,  F02D13/06 ,  F02D41/00 ,  F02D37/02 ,  F02D41/28

Abstract: Skip fire engine control using a first order sigma delta based firing controller is described. An engine controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. The operational firing fraction is selected from a set of available firing fractions. The engine controller uses a first order sigma delta based converter to direct working cycle firings in a skip fire manner that delivers the selected firing fraction. The converter includes or functions substantially equivalent to a first order sigma delta converter and may be implemented any of: algorithmically using a processor; using digital, analog or hybrid components; using a lookup table; or using other appropriate techniques. In some embodiments firing decisions are made on a working cycle by working cycle basis. The described approach may be used in gasoline engines, diesel engines, turbocharged or supercharged engines, or others.

公开(公告)号：US09982611B2

公开(公告)日：2018-05-29

申请号：US15401516

申请日：2017-01-09

Applicant: Tula Technology, Inc.

Inventor： Adya S. Tripathi ,  Chester J. Silvestri ,  Christopher W. Chandler ,  Christopher C. Hand ,  Joshua P. Switkes ,  Mark A. Wilcutts ,  Matthew A. Younkins

IPC: F02D41/00 ,  F02P5/15 ,  F02D13/06 ,  F02B75/02 ,  F02D41/26 ,  F02D41/30 ,  F02D41/14 ,  F02P5/04

CPC classification number: F02D41/0087 ,  F02B75/02 ,  F02B2075/027 ,  F02D13/06 ,  F02D17/02 ,  F02D37/02 ,  F02D41/1401 ,  F02D41/26 ,  F02D41/266 ,  F02D41/30 ,  F02D2200/0614 ,  F02D2200/602 ,  F02D2250/18 ,  F02D2400/02 ,  F02P5/045 ,  F02P5/1512 ,  Y02T10/46

Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines based on skip fire operation of the engine are described. In one aspect the skip fire decisions are made on a working cycle by working cycle basis. During selected skipped working cycles, the corresponding cylinders are deactivated such that air is not pumped through the cylinder during the selected skipped working cycles. In some implementations, the cylinders are deactivated by holding associated intake and exhaust valves closed such that an air charge is not present in the working chamber during the selected skipped working cycles.

公开(公告)号：US09086024B2

公开(公告)日：2015-07-21

申请号：US14188479

申请日：2014-02-24

Applicant: Tula Technology, Inc.

Inventor： Adya S. Tripathi ,  Chester J. Silvestri

IPC: F02D37/02 ,  F02D17/02 ,  F02D41/00 ,  F02D41/14 ,  F02D41/26 ,  F02P5/15 ,  G06F19/00

CPC classification number: F02D41/0087 ,  F02B75/02 ,  F02B2075/027 ,  F02D13/06 ,  F02D17/02 ,  F02D37/02 ,  F02D41/1401 ,  F02D41/26 ,  F02D41/266 ,  F02D41/30 ,  F02D2200/0614 ,  F02D2200/602 ,  F02D2250/18 ,  F02D2400/02 ,  F02P5/045 ,  F02P5/1512 ,  Y02T10/46

Abstract: A variety of methods and arrangements for improving the fuel efficiency of internal combustion engines based on skip fire operation of the engine are described.

Abstract translation: 描述了基于发动机的跳火操作来提高内燃机的燃料效率的各种方法和装置。

公开(公告)号：US20130092127A1

公开(公告)日：2013-04-18

申请号：US13654244

申请日：2012-10-17

Applicant: TULA TECHNOLOGY, INC.

Inventor： Mohammad R. Pirjaberi ,  Adya S. Tripathi ,  Louis J. Serrano

IPC: F02D17/02 ,  F02P5/15

CPC classification number: F02D17/02 ,  F02D13/06 ,  F02D37/02 ,  F02D41/0087 ,  F02D2041/286 ,  F02D2200/101

Abstract: In various described embodiments skip fire control is used to deliver a desired engine output. A controller determines a skip fire firing fraction and (as appropriate) associated engine settings that are suitable for delivering a requested output. In one aspect, the firing fraction is selected from a set of available firing fractions, with the set of available firing fractions varying as a function of engine speed such that more firing fractions are available at higher engine speeds than at lower engine speeds. The controller then direct firings in a skip fire manner that delivers the selected fraction of firings.

Abstract translation: 在各种描述的实施例中，跳过火控制用于传递期望的发动机输出。 控制器确定跳过火焰射击分数以及（适当地）适合于递送请求的输出的相关联的引擎设置。 在一个方面，燃烧部分选自一组可用的燃烧部分，其中可用的燃烧部分的集合作为发动机速度的函数而变化，使得在较高的发动机转速下比在较低的发动机转速下更多的燃烧部分可用。 然后，控制器以点火方式直接点火，从而提供所选择的点火分数。