PATENT CLAIM ANALYSIS

Application Number: 15902685
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-06
Patent Classification: ["123", "19800F"]

Abstract:
A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or other dynamic firing level modulation operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, TCC slip, etc.) is changed to, or close to a target position before a corresponding firing fraction change is implemented. When the actuator change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps. A number of intermediate target selection schemes are described as well.

Claim (Index 1):
A method of controlling an engine to deliver a requested engine output, the method comprising:\n (a) while the engine is operating at a first effective firing fraction and an associated first cam phase, determining a requested effective firing fraction that is different than the first effective firing fraction, the requested effective firing fraction being a second effective firing fraction having an associated second cam phase, the second cam phase being different than the first cam phase; (b) selecting an intermediate effective firing fraction that is between the first and second effective firing fractions, the intermediate effective firing fraction having an associated intermediate cam phase; (c) identifying the selected intermediate effective firing fraction as a target effective firing fraction and the intermediate cam phase as a target cam phase; (d) initiating a transition from the first cam phase to one of the second cam phase or the target cam phase; (e) after an actual cam phase is at or within a predetermined range of the target cam phase transitioning to the target effective firing fraction; (f) when the target effective firing fraction is not the second effective firing fraction, selecting a next effective firing fraction having an associated next cam phase and setting the target effective firing fraction to be the next effective firing fraction and setting the target cam phase to be the next cam phase and causing the cam phase to transition towards the next cam phase or to transition towards or to continue transitioning towards the second cam phase; and (g) iteratively repeating (e) and (f) until the requested effective firing fraction is reached; and (h) directing operation of the engine during the transitions to deliver the requested engine output, whereby an actual commanded effective firing fraction changes over the course of the transition, and wherein operating the engine at at least one of the first, second and intermediate effective firing fractions involves operating the engine in a multi-level skip fire or multi-charge level operating mode.

Metadata:
- Claim Count in Document: 80.0
- Percentile: 88.0
- Lexical Diversity: 1.59459
- Patent Class: 123.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15298542', '15792175', '15288847', '15697639', '15147690']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7916547434992407
- 35 USC 102 Novelty (BERT): 0.5698654935122553
- Combined Prediction Score: 0.7694758185005421
- Mean Citation Score: 421.093126
- Max Citation Score: 467.5652
- Similarity Product: 460.6417457448005

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test