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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
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.
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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
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.
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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
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.
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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
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.
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公开(公告)号：US09790867B2
公开(公告)日：2017-10-17
申请号：US15009533
申请日：2016-01-28
Applicant: Tula Technology, Inc.
Inventor： Steven E. Carlson , Xin Yuan , Siamak Hashemi , Vijay Srinivasan , Srihari Kalluri , Andrew W. Phillips , Mark A. Wilcutts , Louis J. Serrano , Shikui Kevin Chen
IPC: F02D41/32 , F02D17/02 , F01N11/00 , F02M35/10 , F02D41/00 , F02M25/08 , F02D41/12 , F02D29/02 , F02D9/02
CPC classification number: F02D17/02 , F01N11/007 , F02D29/02 , F02D41/003 , F02D41/0087 , F02D41/126 , F02D2009/024 , F02D2041/0012 , F02D2200/0406 , F02D2250/08 , F02D2250/41 , F02M25/089 , F02M35/10222 , F02M35/10229
Abstract: Methods and arrangements for transitioning an engine between a deceleration cylinder cutoff (DCCO) state and an operational state are described. In one aspect, transitions from DCCO begin with reactivating cylinders to pump air to reduce the pressure in the intake manifold prior to firing any cylinders. In another aspect, transitions from DCCO, involve the use of an air pumping skip fire operational mode. After the manifold pressure has been reduced, the engine may transition to either a cylinder deactivation skip fire operational mode or other appropriate operational mode. In yet another aspect a method of transitioning into DCCO using a skip fire approach is described. In this aspect, the fraction of the working cycles that are fired is gradually reduced to a threshold firing fraction. All of the working chambers are then deactivated after reaching the threshold firing fraction.
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Patent Agency Ranking
公开(公告)号：US09739212B1
公开(公告)日：2017-08-22
申请号：US15148826
申请日：2016-05-06
Applicant: Tula Technology, Inc.
Inventor： Vijay Srinivasan , Louis J. Serrano
CPC classification number: F02D41/0087 , F02D41/021 , F02D41/0225 , F02D2200/021 , F02D2200/501 , F02D2200/702 , F02D2250/18
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.
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公开(公告)号：US09399964B2
公开(公告)日：2016-07-26
申请号：US14919011
申请日：2015-10-21
Applicant: Tula Technology, Inc.
Inventor： Matthew A. Younkins , Louis J. Serrano
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 one aspect, a method for controlling operation of an internal combustion engine is described. The engine is operated in a skip fire manner such that selected skipped working cycles are skipped and selected active working cycles are fired to deliver a desired engine output. A particular level of torque output is selected for each of the fired working chambers. Various methods, arrangements and systems related to the above method are also described.
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公开(公告)号：US09273643B2
公开(公告)日：2016-03-01
申请号：US13961701
申请日：2013-08-07
Applicant: Tula Technology, Inc.
Inventor： Steven E. Carlson , Xin Yuan , Joshua P. Switkes , Louis J. Serrano
CPC classification number: F02M25/08 , F02D17/02 , F02D29/02 , F02D41/003 , F02D41/0087 , F02D2009/024 , F02D2250/08 , F02D2250/41 , F02M25/089 , F02M35/10222 , F02M35/10229
Abstract: A variety of methods and arrangements are described for selectively reducing intake manifold pressure in a skip fire engine control system. In some embodiments, a throttle is adjusted to generate a manifold vacuum, which is used for various applications, including but not limited to purging a fuel vapor canister, reducing pressure within a brake vacuum booster reservoir and/or venting gas from a crankcase interior. An engine firing fraction is increased to help maintain a desired torque level. Other techniques for reducing the intake manifold pressure are also described, such as applications involving a return to idle.
Abstract translation: 描述了各种方法和布置，用于选择性地减少跳火消防车控制系统中的进气歧管压力。 在一些实施例中，调节节气门以产生歧管真空，其用于各种应用，包括但不限于清除燃料蒸汽罐，降低制动真空助力器容器内的压力和/或从曲轴箱内部排出气体。 发动机点火分数增加以帮助保持期望的转矩水平。 还描述了用于降低进气歧管压力的其它技术，例如涉及返回空转的应用。
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公开(公告)号：US08880258B2
公开(公告)日：2014-11-04
申请号：US13681378
申请日：2012-11-19
Applicant: Tula Technology, Inc.
Inventor： Leo G. Breton , Ronald D. Yuille , Mark A. Shost , Louis J. Serrano , John W. Parsels , Matthew A. Younkins
CPC classification number: B60W20/10 , B60K6/28 , B60K6/485 , B60W10/06 , B60W10/08 , B60Y2300/435 , B60Y2400/114 , Y02T10/6226 , Y02T10/6286 , Y10S903/93
Abstract: Methods and arrangements for controlling hybrid powertrains are described. In one aspect, an engine is alternatingly operated at different effective displacements. One displacement delivers less than a requested powertrain output and the other delivers more. A motor/generator system is used to add and subtract torque to/from the powertrain to cause the net delivery of the requested powertrain output. In some embodiments, energy added and subtracted from the powertrain is primarily drawn from and stored in a capacitor (e.g., a supercapacitor or an ultracapacitor) when alternating between effective displacements. In another aspect a hybrid powertrain arrangement includes an engine a motor/generator and an energy storage system that includes both a battery and a capacitor. The capacitor stores and delivers electrical energy to the motor/generator unit during operation of the engine in a variable displacement or skip fire mode.
Abstract translation: 描述了控制混合动力系的方法和布置。 在一个方面，发动机以不同的有效位移交替地操作。 一个位移传递小于所请求的动力总成输出，另一个输送更多。 电动机/发电机系统用于向/从动力系增加和减少扭矩，以使得所需动力系统输出的净运送。 在一些实施例中，当在有效位移之间交替时，从动力系中加入和减去的能量主要从电容器（例如超级电容器或超级电容器）中抽出并存储。 在另一方面，一种混合式动力总成装置包括发动机，电动机/发电机和包括电池和电容器的能量存储系统。 电容器在发动机运行中以可变排量或跳火模式存储并向电动机/发电机单元传送电能。
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公开(公告)号：US11680505B2
公开(公告)日：2023-06-20
申请号：US17686247
申请日：2022-03-03
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin Chen , Matthew A. Younkins , Louis J. Serrano
CPC classification number: F01N3/2033 , F01N3/021 , F01N3/0814 , F01N3/2066 , F01N11/005 , F01N13/009 , F02D41/0087 , F02D41/401 , F01N2430/08 , F01N2900/08 , F01N2900/1404 , F01N2900/1602 , F02D2041/0012 , F02D2200/0802 , F02D2200/0804 , Y02T10/12 , Y02T10/40
Abstract: A skip fire engine controller and method of control is described wherein during transitions from a first firing density to a second firing density, a firing density and a pumping density are separately set so as to balance the conflicting demands of (a) torque control, (b) Noise, Vibration and Harshness (NVH), (c) air flow through the engine and (d) air-fuel ratio.
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