PATENT CLAIM ANALYSIS

Application Number: 15944341
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-08
Patent Classification: ["701", "104000"]

Abstract:
Methods and systems are provided for accurately estimating intake aircharge based on the output of an intake oxygen sensor while flowing EGR, purge, or PCV hydrocarbons to the engine. The unadjusted aircharge estimate is used for engine fuel control while the hydrocarbon adjusted aircharge estimate is used for engine torque control. A controller is configured to sample the oxygen sensor at even increments in a time domain, stamp the sampled data in a crank angle domain, store the sampled data in a buffer, and then select one or more data samples corresponding to a last firing period from the buffer for estimating the intake aircharge.

Claim (Index 16):
A system, comprising:\n an engine having a cylinder supplied with intake air from an intake passage; an oxygen sensor coupled to the intake passage; an EGR passage for recirculating exhaust gas from an exhaust passage to the intake passage, the EGR passage including an EGR valve and an EGR sensor; an exhaust gas sensor coupled to the exhaust passage; a direct fuel injector for injecting fuel into the cylinder; and a controller with computer readable instructions stored on non-transitory memory for: while recirculating exhaust gas to the intake passage,\n sampling a signal from the oxygen sensor at a predetermined sampling rate; \n for each sample, stamping the sample with a corresponding engine crank angle; \n storing each stamped sample in a buffer; and \n responsive to a request to inject fuel into the cylinder,\n retrieving at least two samples from the buffer having a crank angle stamp corresponding to a firing period immediately preceding the request; \n calculating an aircharge estimate for the cylinder based on an average of the retrieved at least two samples; \n determining a fuel injection amount based on the calculated aircharge estimate; \n correcting the fuel injection amount based on a learned fuel injector error; and \n commanding a pulse width to the fuel injector based on the corrected fuel injection amount.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 91.0
- Lexical Diversity: 1.68657
- Patent Class: 701.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15075875', '15076212', '15056745', '14956784', '14252679']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.5082053754033822
- 35 USC 102 Novelty (BERT): 0.5587079763658106
- Combined Prediction Score: 0.513255635499625
- Mean Citation Score: 386.435122
- Max Citation Score: 456.677
- Similarity Product: 387.9045667477847

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 0

Dataset: test