公开(公告)号：US20150232103A1

公开(公告)日：2015-08-20

申请号：US14704630

申请日：2015-05-05

Applicant: Tula Technology, Inc.

Inventor： Andrew W. PHILLIPS ,  Steven E. CARLSON

IPC: B60W30/20 ,  B60W10/06 ,  F16H61/14 ,  B60W10/02 ,  F02D29/02 ,  F02P5/15

CPC classification number: F02D41/0087 ,  B60W10/02 ,  B60W10/026 ,  B60W10/06 ,  B60W30/20 ,  F02D11/105 ,  F02D13/06 ,  F02D29/02 ,  F02D41/022 ,  F02D41/123 ,  F02D41/18 ,  F02D2250/18 ,  F02P5/1512 ,  F16H61/143 ,  F16H2061/145 ,  Y10T477/73

Abstract: A variety of methods and arrangements for determining conditions when an engine-decoupling friction interface may be locked-up during skip-fire operation of an internal combustion engine are described. In some embodiments, the engine-decoupling friction interface is the lockup clutch of a torque converter situated in a powertrain that transmits motive power from the engine to a wheel. Rotation of the wheel causes vehicle motion.

Abstract translation: 描述了用于在内燃机的跳火操作期间当发动机分离摩擦界面被锁定时确定条件的各种方法和装置。 在一些实施例中，发动机分离摩擦界面是位于动力传动系中的变矩器的锁止离合器，其将动力从发动机传递到车轮。 车轮的旋转会导致车辆运动。

公开(公告)号：US20230227041A1

公开(公告)日：2023-07-20

申请号：US17576160

申请日：2022-01-14

Applicant: Tula Technology, Inc.

Inventor： Louis J. SERRANO ,  Xiaoping CAI ,  Andrew W. PHILLIPS

IPC: B60W30/19 ,  F02D41/02 ,  F02D41/00 ,  B60W10/11 ,  B60W10/06

CPC classification number: B60W30/19 ,  F02D41/0225 ,  F02D41/0087 ,  B60W10/11 ,  B60W10/06 ,  F02D2200/501 ,  F02D2200/101

Abstract: Methods and controllers for controlling engine speed to reduce NVH that occurs in conjunction with transmission shifts are described. In some embodiments, when a transmission shift to a target gear is expected, a target engine speed appropriate for the target gear is first determined. A target rate of change of the engine speed is calculated from the initial engine speed and target engine speed in conjunction with a target transition time. A target torque is then calculated from the target rate of change of engine speed. A target firing fraction or induction ratio are determined that are desired for use with the target engine speed based on the target torque. The transition to the target engine speed and target firing fraction or induction ratio are completed before the gear shift is completed. The described approaches are well suited for use during skip fire or other cylinder output level modulation operation of the engine.

公开(公告)号：US20210404412A1

公开(公告)日：2021-12-30

申请号：US17218657

申请日：2021-03-31

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Andrew W. PHILLIPS ,  Jerry F. FUSCHETTO

IPC: F02D41/40 ,  F02D13/02 ,  F02D41/00

Abstract: A skip fire engine controller is disclosed that commands an early direct-injection of fuel during a skipped working cycle in which a cylinder is not exhausted. With early direct injection, the fuel has more time to vaporize and mix with air for combustion in an immediately following working cycle in which the cylinder is fired. By increasing the degree of vaporization and mixing, the combustion is both cleaner and more efficient.

公开(公告)号：US20210001832A1

公开(公告)日：2021-01-07

申请号：US17029560

申请日：2020-09-23

Applicant: Tula Technology, Inc.

Inventor： Andrew W. PHILLIPS ,  Louis J. SERRANO ,  Xiaoping CAI

IPC: B60W10/06 ,  F02D17/02 ,  F02D13/06

Abstract: Methods and controllers for coordinating firing fraction transitions that occur in conjunction with transmission shifts are described. In one aspect, an engine controller transmits a do-not-shift instruction to a transmission controller based at least in part on a determination that a particular type of firing fraction transition is desired. The firing fraction transition is then implemented using a skip fire transition protocol. In this manner, the transmission is affirmatively prevented from shifting during the firing fraction transition. The described approaches are well suited for use in connection with transitions to DCCO or DFCO operation.

公开(公告)号：US20160146121A1

公开(公告)日：2016-05-26

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: F02D17/02 ,  F01N11/00

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.

Abstract translation: 描述了在减速气缸截止（DCCO）状态和操作状态之间转换发动机的方法和装置。 在一个方面，来自DCCO的过渡开始于重新激活气缸以泵送空气以在点燃任何气缸之前减小进气歧管中的压力。 在另一方面，来自DCCO的过渡涉及使用空气泵送跳火操作模式。 在歧管压力降低之后，发动机可以转变到气缸停用跳火操作模式或其他适当的操作模式。 在另一方面，描述了使用跳跃火方式转换到DCCO的方法。 在这方面，被烧制的工作循环的分数逐渐降低到阈值燃烧分数。 然后在达到阈值点火分数之后，所有的工作室都被停用。

公开(公告)号：US20170030278A1

公开(公告)日：2017-02-02

申请号：US14812370

申请日：2015-07-29

Applicant: Tula Technology, Inc.

Inventor： Andrew W. PHILLIPS

IPC: F02D41/00 ,  F02D41/26

CPC classification number: F02D41/0087 ,  F02D13/06 ,  F02D41/009 ,  F02D41/3058 ,  F02D2041/0012 ,  F02D2200/024 ,  F02D2200/101 ,  F02D2250/12

Abstract: Techniques and controllers are described for dynamically determining when to request firing decisions for individual firing opportunities while operating an internal combustion engine in a skip fire mode. In one aspect, a skip fire controller is arranged to periodically determine the timing by which a next cylinder firing decision request must be made in order to assure that a corresponding firing decision can be implemented as desired, and whether there is sufficient time to wait until at least the next periodic timing determination is made to request the next cylinder firing decision. When there is not sufficient time to wait, a firing decision request is made and the corresponding working cycle is either skipped or fired based on the received firing decision. When there is sufficient time to wait, the firing decision request is delayed until at least the next periodic timing determination is made.

Abstract translation: 描述了技术和控制器，用于动态地确定何时在以跳火模式操作内燃机的同时请求用于各个发射机会的点火判定。 一方面，跳过火控制器被布置成周期性地确定必须进行下一个气缸触发判定请求的定时，以便确保可以根据需要实现相应的触发判定，以及是否有足够的时间等待直到 至少进行下一个周期性定时确定以请求下一个气缸点火判定。 当没有足够的时间等待时，作出触发决定请求，并且基于接收的触发判定来跳过或触发相应的工作循环。 当有足够的时间等待时，触发判决请求被延迟，直到进行至少下一个定时定时确定。