公开(公告)号：US11236689B2

公开(公告)日：2022-02-01

申请号：US17002548

申请日：2020-08-25

Applicant: Tula Technology, Inc.

Inventor： Xin Yuan ,  Matthew A. Younkins

IPC: F02D41/04 ,  F02D13/06 ,  F02D17/02 ,  F02P5/145 ,  F02D41/00 ,  F02D13/02 ,  F02D41/10 ,  F02D41/12 ,  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：US20210396189A1

公开(公告)日：2021-12-23

申请号：US17463814

申请日：2021-09-01

Applicant: Tula Technology, Inc.

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

IPC: F02D41/00 ,  F02D41/14 ,  F02D41/30 ,  B60W30/20

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.

公开(公告)号：US20210363931A1

公开(公告)日：2021-11-25

申请号：US17224648

申请日：2021-04-07

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Matthew A. YOUNKINS ,  Xi LUO

IPC: F02D41/06 ,  F02P5/14 ,  F02D41/30 ,  F01L1/34 ,  F02D41/00 ,  F01N3/10 ,  F01N3/035 ,  F01N3/20 ,  F01M1/16 ,  F01L9/16 ,  F01M1/02 ,  F01M5/00 ,  F02D17/02

Abstract: A system and method for a variable displacement internal combustion engine using different types of pneumatic cylinder springs on skipped working cycles to control engine and aftertreatment system temperatures are described. The system and method may be used to rapidly heat up the aftertreatment system(s) and/or an engine block of the engine following a cold start by using one or more different types of pneumatic cylinder springs during skipped firing opportunities. By rapidly heating the aftertreatment system(s) and/or engine block, noxious emissions such as hydrocarbons, carbon monoxide, NOx and/or particulates, following cold starts are significantly reduced.

公开(公告)号：US20210355887A1

公开(公告)日：2021-11-18

申请号：US17390223

申请日：2021-07-30

Applicant: Cummins Inc. ,  Tula Technology, Inc.

Inventor： Aaron William Beinborn ,  J. Steven Kolhouse

IPC: F02D41/00 ,  F02D41/14 ,  F02D13/06

Abstract: A controller for a vehicle includes at least one processor and at least one memory storing instructions that, when executed by the processor, cause the controller to perform various operations. The operations include determining that the vehicle is in reverse and in response, deactivating a cylinder of an engine of the vehicle.

公开(公告)号：US11143575B2

公开(公告)日：2021-10-12

申请号：US17098694

申请日：2020-11-16

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Shikui Kevin Chen

IPC: G01M15/10 ,  F02D17/02

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.

公开(公告)号：US11131259B1

公开(公告)日：2021-09-28

申请号：US17119321

申请日：2020-12-11

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Louis J. Serrano ,  Xiaoping Cai ,  Shikui Kevin Chen ,  Benjamin M. Wolk ,  Avra Brahma ,  Justin R. Lee

IPC: F02D41/14 ,  F02D41/00 ,  F02D17/02 ,  F02D37/02 ,  F02D13/06

Abstract: A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second firing fraction, a charge of a combustion recipe is ascertained and used operating the cylinders of the variable displacement internal combustion engine to generate the desired torque output. The charge is preferably optimized for the engine operating at the second firing fraction, at least relative to the previous charge of the previous combustion recipe used with the first firing fraction.

公开(公告)号：US20210262405A1

公开(公告)日：2021-08-26

申请号：US17314785

申请日：2021-05-07

Applicant: Tula Technology, Inc.

Inventor： Louis J. SERRANO ,  Matthew A. YOUNKINS

IPC: F02D41/00 ,  F02D41/04 ,  F02D13/06 ,  F02D13/02 ,  F02D17/02 ,  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：US20210239016A1

公开(公告)日：2021-08-05

申请号：US17157420

申请日：2021-01-25

Applicant: Tula Technology, Inc.

Inventor： Paul R. Van Heyningen

IPC: F01L1/18 ,  F01L1/46

Abstract: A compact switchable roller finger follower having an inner arm and outer arm for a Type II valve train is described. The compact switchable roller finger follower has its widest portion at a mid-arm position. One or more torsion springs provide a restoring force to urge the inner arm into a nested position in the upper arm in which position the inner arm may be locked to the outer arm so that a cam lobe profile is transferred into valve motion. At least one of the torsion springs is located at a mid-arm position.

公开(公告)号：US20210189980A1

公开(公告)日：2021-06-24

申请号：US17190873

申请日：2021-03-03

Applicant: Tula Technology, Inc.

Inventor： John W. PARSELS ,  Matthew A. YOUNKINS

IPC: F02D41/00 ,  F02D41/14 ,  F02D41/30 ,  B60W30/20

Abstract: A variety of methods and arrangements for mitigating powertrain and accessory torsional oscillation through electric motor/generator control are described. In one aspect, working chamber air charge and crank position are determined prior to starting an engine. During the engine startup period, an electric motor/generator supplies a smoothing torque to at least partially cancel engine torque variations.

公开(公告)号：US20210003088A1

公开(公告)日：2021-01-07

申请号：US17026706

申请日：2020-09-21

Applicant: Tula Technology, Inc.

Inventor： Shikui Kevin CHEN ,  Aditya MANDAL ,  Li-Chun CHIEN ,  Elliott ORTIZ-SOTO

IPC: F02D41/14 ,  F01N13/10 ,  F02D41/00 ,  F02D41/22 ,  F02B5/02 ,  F02B9/04 ,  G06N20/00 ,  G06N5/04

Abstract: Using machine learning for cylinder misfire detection in a dynamic firing level modulation controlled internal combustion engine is described. In a classification embodiment, cylinder misfires are differentiated from intentional skips based on a measured exhaust manifold pressure. In a regressive model embodiment, the measured exhaust manifold pressure is compared to a predicted exhaust manifold pressure generated by neural network in response to one or more inputs indicative of the operation of the vehicle. Based on the comparison, a prediction is made if a misfire has occurred or not. In yet other alternative embodiment, angular crank acceleration is used as well for misfire detection.