PATENT CLAIM ANALYSIS

Application Number: 15759495
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["123", "445000"]

Abstract:
An engine includes: a piston including a cavity; a cylinder head configured so as to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel in a period from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings which are arranged in a circumferential direction surrounding a longitudinal axis of the valve and through each of which the fuel is injected in a direction inclined relative to the longitudinal axis by a predetermined angle is formed such that when a height of a ceiling of the combustion chamber at a position corresponding to an edge end portion of the cavity in an injection direction of the injection opening is large, the injection angle of the injection opening is large.

Claim (Index 1):
An engine configured to inject fuel directly to a combustion chamber in a cylinder in a predetermined operation range in a period from a second half of a compression stroke until a first half of an expansion stroke and perform ignition after a compression top dead center, the engine comprising:\n a piston including a cavity that is concave downward at a middle portion of an upper surface of the piston; a cylinder head configured so as to form a combustion chamber having a pent roof shape; a fuel injection valve arranged at the cylinder head so as to be located at a position corresponding to a middle portion of the piston, the fuel injection valve being configured to inject the fuel into the cavity of the piston in the period from the second half of the compression stroke until the first half of the expansion stroke; and a spark plug arranged at the cylinder head so as to be provided at a position located at a radially outer side of the middle portion of the piston and corresponding to an upper side of the cavity of the piston, the middle portion corresponding to a position where the fuel injection valve is provided, wherein: the fuel injection valve includes a plurality of injection openings which are arranged in a circumferential direction surrounding a longitudinal axis of the fuel injection valve and through each of which the fuel is injected in a direction inclined relative to the longitudinal axis by a predetermined injection angle; and each of the injection openings is formed such that when a height of a ceiling of the combustion chamber at a position corresponding to an edge end portion of the cavity in an injection direction of the injection opening is large, the injection angle of the injection opening is large.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 90.0
- Lexical Diversity: 1.98734
- Patent Class: 123.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15759190', '15579896', '15538403', '11884674', '12410076']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7596545218949488
- 35 USC 102 Novelty (BERT): 0.5163995220386934
- Combined Prediction Score: 0.7353290219093231
- Mean Citation Score: 294.5646000000001
- Max Citation Score: 362.3086
- Similarity Product: 357.8095698943853

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

Dataset: test