公开(公告)号：US20200318565A1

公开(公告)日：2020-10-08

申请号：US16839609

申请日：2020-04-03

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Vijay SRINIVASAN

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

Abstract: A skip fire controlled internal combustion engine supplies motive power to move to a platform. 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 operational firing fraction is based in part on the platform weight.

公开(公告)号：US20200158044A1

公开(公告)日：2020-05-21

申请号：US16749607

申请日：2020-01-22

Applicant: Tula Technology, Inc.

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

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

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：US20200072152A1

公开(公告)日：2020-03-05

申请号：US16552052

申请日：2019-08-27

Applicant: Tula Technology, Inc.

Inventor： Xi LUO ,  Jerry F. FUSCHETTO ,  Xin YUAN ,  Matthew A. YOUNKINS

IPC: F02D41/30 ,  F02D41/40

Abstract: A vehicle, engine controller and method for coordinating direct split injection of two or more pulses of fuel during a working cycle of a reactivated cylinder which was deactivated in a previous working cycle is described. By using split injection for the reactivated cylinder, the particulate matter and particulate number (“PM/PN”) generated by the reactivated cylinder is reduced.

公开(公告)号：US10557427B2

公开(公告)日：2020-02-11

申请号：US16035614

申请日：2018-07-14

Applicant: Tula Technology, Inc.

Inventor： Matthew A. Younkins ,  Louis J. Serrano

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

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：US10518764B2

公开(公告)日：2019-12-31

申请号：US15874656

申请日：2018-01-18

Applicant: Tula Technology, Inc.

Inventor： Yongyan Cao ,  Ying Ren ,  Louis J. Serrano ,  Robert Scott Bailey ,  Ram Subramanian

IPC: B60W10/06 ,  B60W30/188 ,  B60W30/20 ,  F02D35/02 ,  F02D41/00 ,  F02D41/14 ,  G05D1/00 ,  G06K9/00

Abstract: The present invention relates generally to improving the fuel efficiency of autonomous vehicles by operating either (1) at a first effective engine displacement that takes into account noise, vibration and harshness (NVH) when the vehicle is occupied or (2) at a second effective engine displacement, without concern for occupant NVH, when the vehicle is not occupied. The second effective engine displacement is typically more fuel efficient than the first effective engine displacement, but result in a higher level of NVH compared to the first effective engine displacement.

公开(公告)号：US20190248221A1

公开(公告)日：2019-08-15

申请号：US15894521

申请日：2018-02-12

Applicant: Tula Technology, Inc.

Inventor： Louis J. SERRANO ,  Matthew A. YOUNKINS ,  Vijay SRINIVASAN

IPC: B60K5/12 ,  F16F15/04 ,  F16F15/121 ,  B60W10/06 ,  B60W10/30 ,  B60W30/20 ,  F02D41/00 ,  F02D17/02

CPC classification number: B60K5/1283 ,  B60W10/06 ,  B60W10/30 ,  B60W30/20 ,  B60W2030/206 ,  B60W2510/06 ,  B60W2510/0638 ,  B60W2710/06 ,  B60W2720/00 ,  B60Y2300/205 ,  B60Y2400/48 ,  F02D17/02 ,  F02D41/0087 ,  F16F15/04 ,  F16F15/121 ,  F16F2228/066

Abstract: Systems and methods are described for mitigating vehicle vibration through the control of a variable spring absorber that is part of a powertrain that includes the engine. In some such embodiments, an absorption frequency of the variable spring absorber is tuned in a feed forward manner based at least in part on the current engine speed and a factor indicative of the minimum repeating firing sequence cycle length associated with the current effective firing fraction (which in many implementations may be the denominator of the firing fraction).

公开(公告)号：US10344692B2

公开(公告)日：2019-07-09

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

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：US20190170074A1

公开(公告)日：2019-06-06

申请号：US16270349

申请日：2019-02-07

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: F02D41/00 ,  F02D41/24 ,  F02D17/02

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：US10303169B2

公开(公告)日：2019-05-28

申请号：US15963889

申请日：2018-04-26

Applicant: Tula Technology, Inc.

Inventor： Ram Subramanian ,  Louis J. Serrano ,  Matthew A. Younkins

IPC: G05D1/00 ,  F02D17/02 ,  F02D41/00 ,  F02D41/14 ,  F02P5/15 ,  B60W30/188 ,  F02D11/10 ,  F02D29/02

Abstract: The present invention relates generally to techniques for improving fuel efficiency of a vehicle powered by an internal combustion engine capable of operating at various displacement levels. An autonomous driving unit or cruise controller selects when possible an engine torque output that corresponds to a fuel efficient displacement level. The resultant vehicle speed profile and NVH level is acceptable to vehicle occupants.

公开(公告)号：US10161328B2

公开(公告)日：2018-12-25

申请号：US15299259

申请日：2016-10-20

Applicant: Tula Technology, Inc.

Inventor： Louis J. Serrano

IPC: F02D41/00 ,  F02D17/02 ,  F02D17/00 ,  F02D41/30

Abstract: Methods and controllers for dynamically altering the phase of a firing sequence during operation of an engine are described. The described methods and controllers are particularly useful in conjunction with dynamic skip fire operation of the engine.