Invention Application
- Patent Title: NOISE, VIBRATION AND HARSHNESS REDUCTION IN A SKIP FIRE ENGINE CONTROL SYSTEM
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Application No.: US17075072Application Date: 2020-10-20
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Publication No.: US20220120230A1Publication Date: 2022-04-21
- Inventor: Mark A. WILCUTTS , Xi LUO , Anastasios ARVANITIS
- Applicant: Tula Technology, Inc. , Cummins Inc.
- Applicant Address: US CA San Jose; US IN Columbus
- Assignee: Tula Technology, Inc.,Cummins Inc.
- Current Assignee: Tula Technology, Inc.,Cummins Inc.
- Current Assignee Address: US CA San Jose; US IN Columbus
- Main IPC: F02D41/00
- IPC: F02D41/00 ; F01N3/021 ; F01M1/02 ; B60W10/08 ; F01N3/10 ; F02D41/02 ; F02D41/14 ; B60W30/20 ; F02D41/06 ; B60W10/06 ; F01N3/20 ; F02B67/06 ; F02D13/02 ; F02D41/40 ; F01M5/00

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.
Public/Granted literature
- US11555461B2 Noise, vibration and harshness reduction in a skip fire engine control system Public/Granted day:2023-01-17
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