-
211.发明授权公开(公告)号：US11143125B1
公开(公告)日：2021-10-12
申请号：US17138116
申请日：2020-12-30
Applicant: Tula Technology, Inc.
Inventor： Louis Joseph Serrano , Vijay Srinivasan
Abstract: Methods, systems, and devices for operating an internal combustion engine at a firing fraction that is less than a value of 1.0, wherein one or more cylinders of the internal combustion engine are not designated to be fired, determining a smoothing event time period where a particular one of the cylinders that have not been designated to be fired is either skipped or recharged, selecting a periodic disruptive waveform to approximate that is related to a skip or recharge event that is part of the smoothing event time period, determining a first harmonic sinusoid from a group of harmonic sinusoids that reduces the error between an approximated waveform and the disruptive waveform, determining a timeframe for utilizing the first harmonic, and actuating an additional motor to initiate a supplemental quantity of torque during the smoothing event time period based on the disruption quantity of torque.
-
公开(公告)号：US11136928B2
公开(公告)日：2021-10-05
申请号：US17064354
申请日：2020-10-06
Applicant: Tula Technology, Inc.
Inventor： Louis J. Serrano , Xin Yuan , John W. Parsels , Mohammad R. Pirjaberi , Mark A. Wilcutts , Masaki Nagashima
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 skip fire manner. A smoothing torque is determined 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 skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
-
213.发明申请公开(公告)号：US20210262896A1
公开(公告)日：2021-08-26
申请号：US17098694
申请日：2020-11-16
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Shikui Kevin CHEN
Abstract: A diagnostic system and method that (a) that uses models indicative of both successful firing and skips to determine if cylinders of a skip fire controlled internal combustion engine have successfully fired or successfully skipped and (b) uses filtered exhaust gas pressure readings for detecting faults associated with EGR systems and/or turbocharger systems.
-
214.发明申请公开(公告)号：US20210254515A1
公开(公告)日：2021-08-19
申请号：US17175798
申请日：2021-02-15
Applicant: Tula Technology, Inc.
Inventor： Elliott A. Ortiz-Soto
Abstract: The invention relates generally valve train systems for internal combustion engine. More particularly, valve train configurations enable operation of a cylinder with two distinct, non-zero lift profiles and cylinder deactivation.
-
公开(公告)号：US20210180544A1
公开(公告)日：2021-06-17
申请号：US17110917
申请日：2020-12-03
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Xin YUAN , Shikui Kevin CHEN , Jennifer K. LIGHT-HOLETS , Scott R. BARDAKJY
Abstract: A system and method of integrating an engine having dynamic skip fire control with an exhaust gas recirculation system in a turbocharged internal combustion engine is described. An engine control system determines an appropriate firing pattern based at least in part on a desired exhaust gas recirculation flow rate. Signals from sensors in the intake manifold and exhaust system may also be used as part of a feedback loop to determine a desired exhaust gas recirculation flow rate.
-
Patent Agency Ranking
公开(公告)号：US11008995B2
公开(公告)日：2021-05-18
申请号：US16694621
申请日：2019-11-25
Applicant: Tula Technology, Inc.
Inventor： Elliott A. Ortiz-Soto , Matthew A. Younkins
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：US20210040908A1
公开(公告)日：2021-02-11
申请号：US17077887
申请日：2020-10-22
Applicant: Tula Technology, Inc.
Inventor： Vijay Srinivasan
Abstract: Methods, systems, and devices for deceleration firing fraction/deceleration cylinder cut off (DCCO) control with turbocharger rotational speed feedback are disclosed herein. An engine controller in a vehicle for controlling an internal combustion engine, the controller configured to: determine a threshold rotational speed for a turbocharger, determine a target firing fraction that will allow the engine to maintain a speed above the threshold, initiate a DCCO process wherein the DCCO process reduces flow of exhaust to the turbocharger and thereby the turbocharger rotational speed decreases, receive speed data of the turbocharger rotational speed, and analyze the received data to determine when to switch the firing fraction of the engine from an original firing fraction to the determined target firing fraction to maintain the rotational speed of the turbocharger above the threshold.
-
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
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.
-
219.发明授权公开(公告)号：US10823029B2
公开(公告)日：2020-11-03
申请号：US16373364
申请日：2019-04-02
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin Chen , Matthew A. Younkins
IPC: F01N3/08 , F01N3/20 , F02D41/00 , F01N11/00 , F01N3/021 , F02D41/40 , F01N13/00 , F02D41/14 , F02D13/06 , F02D41/02
Abstract: A skip fire control that relies on a combination of a torque request, exhaust temperature, and air-fuel ratio in determining firing density is described. Also, skipped firing opportunities may either pump or not pump air into an exhaust system, allowing an exhaust gas temperature in the exhaust system to be controlled or modulated. The present invention is also related to Dynamic Skip Fire (DSF), where a decision to either fire or skip cylinders is made every firing opportunity.
-
公开(公告)号：US10808672B2
公开(公告)日：2020-10-20
申请号：US16021532
申请日：2018-06-28
Applicant: Tula Technology, Inc.
Inventor： Elliott A. Ortiz-Soto , Matthew A. Younkins
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.
-
-
-
-
-
-
-
-
-
Search Results
342
records
(took 0.026 seconds)
