公开(公告)号：US10259461B2

公开(公告)日：2019-04-16

申请号：US15792175

申请日：2017-10-24

Applicant: Tula Technology, Inc.

Inventor： Louis J. Serrano ,  Steven E. Carlson

IPC: B60W30/188 ,  B60W10/02 ,  B60W10/06 ,  F02D41/00 ,  F02D41/02 ,  F02P5/145 ,  F02D37/02 ,  F02P5/15 ,  F02D17/02 ,  F02P9/00

Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or dynamic firing level modulation operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, TCC slip, etc.) is changed to, or close to a target position before a corresponding firing fraction change is implemented. When the actuator change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps. A number of intermediate target selection schemes are described as well.

公开(公告)号：US10247121B2

公开(公告)日：2019-04-02

申请号：US14638908

申请日：2015-03-04

Applicant: Tula Technology Inc. ,  GM Global Technology Operations LLC

Inventor： Mark A. Shost ,  Louis J. Serrano ,  Steven E. Carlson ,  Vijay Srinivasan ,  Eric J. Defenderfer ,  Nitish J. Wagh ,  Randall S. Beikmann ,  Jinbiao Li ,  Xin Yuan ,  Li-Chun Chien

IPC: F02D17/02 ,  F02D41/00 ,  F02D41/24 ,  F02D41/02 ,  F02D41/14

Abstract: In one aspect, a skip fire engine controller is described. The skip fire engine controller includes a skip fire module arranged to determine an operational firing fraction and associated cylinder load for delivering a desired engine output. The skip fire engine controller also includes a firing controller arranged to direct firings in a skip fire manner that delivers the selected operational firing fraction. Various methods, modules, lookup tables and arrangements related to the selection of a suitable operational firing fraction are also described.

公开(公告)号：US10247072B2

公开(公告)日：2019-04-02

申请号：US15347562

申请日：2016-11-09

Applicant: Tula Technology, Inc.

Inventor： Matthew A. Younkins ,  Shikui Kevin Chen ,  Mark A. Wilcutts

IPC: F01N3/20 ,  F01N3/08 ,  F02D41/00 ,  F01N11/00 ,  F01N3/021 ,  F02D41/40 ,  F01N13/00

Abstract: A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner such that the temperature of the aftertreatment element is controlled within its effective operating range.

公开(公告)号：US20190003442A1

公开(公告)日：2019-01-03

申请号：US16021532

申请日：2018-06-28

Applicant: Tula Technology, Inc.

Inventor： Elliot A. ORTIZ-SOTO ,  Matthew A. YOUNKINS

IPC: F02P5/04 ,  F02P5/15 ,  F02D41/00 ,  F02D13/02 ,  F02D41/26

Abstract: Methods, devices, controllers, and algorithms are described for operating an internal combustion engine wherein at least some firing opportunities utilize low temperature gasoline combustion (LTGC). Other firing opportunities may be skipped or utilize some other type of combustion, such as spark ignition. The nature of any particular firing opportunity is dynamically determined during engine operation, often on a firing opportunity by firing opportunity basis. Firings that utilize LTGC produce little, if any, nitrous oxides in the exhaust stream and thus, in some implementations, may require no aftertreatment system to remove them from the exhaust stream.

公开(公告)号：US20180320615A1

公开(公告)日：2018-11-08

申请号：US16038622

申请日：2018-07-18

Applicant: Tula Technology, Inc.

Inventor： Mohammad R. PIRJABERI ,  Kian EISAZADEH-FAR ,  Steven E. CARLSON ,  Louis J. SERRANO

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

CPC classification number: F02D41/0087 ,  F02D41/0002 ,  F02D41/1498 ,  F02D41/3058 ,  F02D41/307 ,  F02D2041/0012 ,  Y02T10/42

Abstract: Methods, devices, estimators, controllers and algorithms are described for estimating the torque profile of an engine and/or for controlling torque applied to a powertrain by one or more devices other than the engine itself to manage the net torque applied by the engine and other device(s) in manners that reduce undesirable NVH. The described approaches are particularly well suitable for use in hybrid vehicles in which the engine is operated in a skip fire or other dynamic firing level modulation manner—however they may be used in a variety of other circumstances as well. In some embodiments, the hybrid vehicle includes a motor/generator that applies the smoothing torque.

公开(公告)号：US20180320614A1

公开(公告)日：2018-11-08

申请号：US16035614

申请日：2018-07-14

Applicant: Tula Technology, Inc.

Inventor： Matthew A. YOUNKINS ,  Louis J. SERRANO

IPC: F02D41/00 ,  F02D13/02 ,  F02D41/04 ,  F02D13/06 ,  F02D11/02 ,  F02P5/15 ,  F02D41/26 ,  F01L1/047 ,  F02P5/145 ,  F02D41/12 ,  F02D41/10 ,  F02D17/02

CPC classification number: F02D41/0087 ,  F01L1/047 ,  F02D11/02 ,  F02D13/0223 ,  F02D13/0273 ,  F02D13/06 ,  F02D17/02 ,  F02D41/0002 ,  F02D41/008 ,  F02D41/04 ,  F02D41/107 ,  F02D41/123 ,  F02D41/26 ,  F02D2041/001 ,  F02D2041/0012 ,  F02D2250/18 ,  F02P5/145 ,  F02P5/1502 ,  Y02T10/142 ,  Y02T10/42

Abstract: In various aspects, internal combustion engines, engine controllers and methods of controlling engines are described. The engine includes a camshaft and a two cylinder sets. Cylinders in the first are deactivatable and cylinders in the second set may be fired at high or low output levels. The air charge for each fired working cycle is set based on whether a high or low torque output is selected. In some implementations, the camshaft is axially shiftable between first and second positions. First cam lobes are configured to cause their associated cylinders to intake a large air charge during intake strokes that occur when the camshaft is in the first position. Second cam lobes for cylinders in the second set cause their associated cylinders to intake a smaller air charge when the camshaft is in the second position. Second cam lobes for cylinders in the first set deactivate their associated cylinders.

公开(公告)号：US10094313B2

公开(公告)日：2018-10-09

申请号：US15902685

申请日：2018-02-22

Applicant: Tula Technology, Inc. ,  GM Global Technology Operations LLC

Inventor： Louis J. Serrano ,  Steven E. Carlson ,  Steven J. Haase ,  Donavan L. Dibble ,  Allen B. Rayl

IPC: F02D41/00 ,  F02D41/02 ,  F02D37/02 ,  F02D17/02 ,  B60W10/06 ,  B60W10/02 ,  F02P5/15 ,  B60W30/188

Abstract: A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or other dynamic firing level modulation operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, TCC slip, etc.) is changed to, or close to a target position before a corresponding firing fraction change is implemented. When the actuator change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps. A number of intermediate target selection schemes are described as well.

公开(公告)号：US20180163650A1

公开(公告)日：2018-06-14

申请号：US15894548

申请日：2018-02-12

Applicant: Tula Technology, Inc.

Inventor： Louis J. SERRANO ,  Vijay SRINIVASAN ,  Geoffrey ROUTLEDGE ,  Mark A. SHOST ,  Biswa R. GHOSH ,  Mark A. WILCUTTS ,  Matthew A. YOUNKINS

IPC: F02D41/00 ,  F02D13/02 ,  F02D41/04 ,  F02D13/06 ,  F02P5/15 ,  F02D41/26 ,  F01L1/047 ,  F02P5/145 ,  F02D41/12 ,  F02D41/10 ,  F02D17/02

CPC classification number: F02D41/0087 ,  F01L1/047 ,  F02D13/0223 ,  F02D13/0273 ,  F02D13/06 ,  F02D17/02 ,  F02D41/0002 ,  F02D41/008 ,  F02D41/04 ,  F02D41/107 ,  F02D41/123 ,  F02D41/26 ,  F02D2041/001 ,  F02D2041/0012 ,  F02D2250/18 ,  F02N11/0837 ,  F02P5/145 ,  F02P5/15 ,  F02P5/1502 ,  F02P9/002 ,  F16F15/02 ,  G10K11/16 ,  G10K11/1785 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/3211 ,  G10K2210/3212 ,  Y02T10/142 ,  Y02T10/42

Abstract: Systems and methods for reducing noise or vibration generated by an internal combustion engine are described. An engine controller is arranged to operate the working chambers of the engine in a cylinder output level modulation manner. A noise/vibration reduction unit actively control of a device that is not a part of the powertrain. The device is controlled in a feed forward manner to alter an NVH characteristic of the vehicle in a desired manner based at least in part on a characteristic of the cylinder output level modulation operation of the engine.

公开(公告)号：US09995652B1

公开(公告)日：2018-06-12

申请号：US15872675

申请日：2018-01-16

Applicant: Tula Technology, Inc.

Inventor： Shikui Kevin Chen

IPC: G01M15/05 ,  G01M15/09 ,  F02M35/10

CPC classification number: G01M15/05 ,  F02M35/1038 ,  G01M15/09

Abstract: A variety of methods, diagnostic modules and other arrangements for detecting air induction faults during operation of an internal combustion engine are described. In some embodiments, the intake manifold pressure is monitored with the intake pressure being read for each induction opportunity. Induction faults may be detected based at least in part on a comparison of the manifold pressure readings for sequential induction opportunities. In some embodiments, an induction fault is identified when the difference between the manifold pressure associated with an induction opportunity and the immediately preceding induction opportunity exceeds an induction fault threshold.

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.