公开(公告)号：US20200080500A1

公开(公告)日：2020-03-12

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 ,  F02D13/06 ,  F02D41/00

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：US20180216551A1

公开(公告)日：2018-08-02

申请号：US15939074

申请日：2018-03-28

Applicant: Tula Technology, Inc.

Inventor： Adya S. TRIPATHI

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

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：US20160363062A9

公开(公告)日：2016-12-15

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: F02D41/00

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.

Abstract translation: 所描述的实施例总体上涉及跳过内燃机的火灾控制，特别涉及用于确定期望的操作燃烧部分的机构。 在一些实施例中，排放分数确定单元布置成确定适于递送所要求的发动机输出的点火分数。 射击分数确定单元可以在确定期望的击发分数时利用诸如查找表的数据结构。 在一个方面，将期望的发动机输出和一个或多个操作动力系参数（例如当前发动机转速）用作用于选择期望的发动部分的查找表的索引。 在其他实施例中，数据结构的附加索引可以包括以下任何一个：传动齿轮; 歧管绝对压力（MAP）; 歧管空气温度; 指示质量空气充注（MAC）的参数; 凸轮位置 气缸扭矩输出; 最大允许歧管压力; 车速; 和大气压力。