Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of changing phase of firing sequence and skip fire engine controller

An ignition sequence and skip ignition technology, applied in engine control, engine components, machines/engines, etc.

Active Publication Date: 2022-04-08
TULA TECH INC
View PDF27 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conceptually, almost any effective displacement can be obtained using skip fire control, but in practice most implementations limit operation to the set of available firing fractions, sequences, or modes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of changing phase of firing sequence and skip fire engine controller
  • Method of changing phase of firing sequence and skip fire engine controller
  • Method of changing phase of firing sequence and skip fire engine controller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] This application describes several techniques that may be used to manage the phasing of the firing sequence. In other words, the described technique allows for the removal of ambiguity about which cylinders to fire and which to skip when the firing fraction results in a fixed pattern.

[0025] Applicants have described a number of ΣΔ conversion based skip fire engine control schemes and controllers that dynamically make firing decisions on a firing opportunity-by-firing occasion basis without using predefined patterns. This technique is sometimes called dynamic skip fire. In some implementations, the firing sequence is determined using a first order ΣΔ transformation. exist figure 1 A representative first-order ΣΔ-based dynamic skip fire controller architecture is shown in and described below. Typically, a requested firing fraction is input to a ΣΔ converter which then outputs a command to skip or fire a specific cylinder duty cycle in such a way that a desired perce...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method and controller are described for dynamically varying the phasing of a firing sequence during operation of an engine. The described methods and controllers are particularly useful in conjunction with dynamic skip fire operation of the engine.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Patent Application No. 15 / 299,259, filed October 20, 2016, which is incorporated herein by reference. technical field [0003] The present invention relates generally to managing firing sequence phasing transitions during skip fire operation of an engine, and more particularly to a method of changing the phasing of a firing sequence and a skip fire engine controller. Background technique [0004] The present invention can be used in applications where it is desired to transition from dynamic skip fire engine control to a fixed cylinder based firing mode. [0005] Skip fire engine control is understood to provide several benefits, including potentially improved fuel efficiency. In general, skip fire engine control contemplates selectively skipping firing of certain cylinders during selected firing opportunities. Thus, for example, a particular cylinder may be fired during one fir...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F02D37/02F01L1/344F02D13/02F02D41/00F02D41/18
CPCF02D41/3058F02D2200/1002F02D2250/18F02D2250/21F02D41/0085F02D41/0087F02D17/02F02D17/00
Inventor 路易斯·J·塞拉诺
Owner TULA TECH INC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com