公开(公告)号：US11248546B1

公开(公告)日：2022-02-15

申请号：US17080082

申请日：2020-10-26

Applicant: Tula Technology, Inc. ,  Cummins Inc.

Inventor： Elliott A. Ortiz-Soto ,  Shahaboddin Owlia

IPC: F02D41/00 ,  F02B37/12 ,  F02D17/02 ,  F02P9/00 ,  F02B5/02 ,  F02B9/04

Abstract: Engine controllers and control schemes are provided for managing engine state transitions requiring increased compressor pressure ratios in turbocharged engines operating in a cylinder output level modulation mode (e.g., skip fire, multi-level skip fire, or firing level modulation modes). In some circumstances, turbo lag can be mitigated by initially transitioning the engine to an intermediate effective firing density that is higher than both the initial and target effective firing density to increase the flow of gases through the engine and the turbocharger while maintaining a compressor ratio the same as or close to the initial compressor pressure ratio. After reaching a point where the desired torque is actually generated at the intermediate effective firing density, the operational effective firing density is gradually reduced to the target effective firing density while increasing the operational compressor pressure ratio to the target compressor ratio.

公开(公告)号：US11560822B2

公开(公告)日：2023-01-24

申请号：US17002509

申请日：2020-08-25

Applicant: Tula Technology, Inc.

Inventor： Shahaboddin Owlia

IPC: F01N9/00 ,  F02D13/06 ,  F02D41/02 ,  F01N3/021

Abstract: Methods, systems, and devices for particulate filter soot management for internal combustion engines are described herein. A method for particulate filter soot management for internal combustion engines includes determining a quantity of soot on a particulate filter and adjusting a skip fire firing sequence based at least in part on maintaining the quantity of soot on the particulate filter within a desired soot quantity range.

公开(公告)号：US11635035B2

公开(公告)日：2023-04-25

申请号：US17569308

申请日：2022-01-05

Applicant: Tula Technology, Inc.

Inventor： Elliott A. Ortiz-Soto ,  Shahaboddin Owlia

IPC: F02D41/00 ,  F02B37/24 ,  F02D41/14 ,  F02D41/18

Abstract: Engine controllers and control schemes are provided for managing engine state transitions requiring increased compressor pressure ratios in turbocharged engines. In some circumstances, turbo lag can be mitigated by initially transitioning the engine to an intermediate engine state that directly or indirectly increases airflow through the engine and turbocharger relative to what would be possible if the engine were immediately commanded to operate at the target engine state. After reaching a point where the desired torque is actually generated at the intermediate engine state, the operational settings are gradually reduced to the target effective firing density while increasing the operational compressor pressure ratio to the target compressor ratio.

公开(公告)号：US20220065151A1

公开(公告)日：2022-03-03

申请号：US17002509

申请日：2020-08-25

Applicant: Tula Technology, Inc.

Inventor： Shahaboddin Owlia

IPC: F01N9/00 ,  F02D13/06 ,  F02D41/02 ,  F01N3/021

Abstract: Methods, systems, and devices for particulate filter soot management for internal combustion engines are described herein. A method for particulate filter soot management for internal combustion engines includes determining a quantity of soot on a particulate filter and adjusting a skip fire firing sequence based at least in part on maintaining the quantity of soot on the particulate filter within a desired soot quantity range.