PATENT CLAIM ANALYSIS

Application Number: 16061087
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-12
Patent Classification: ["123", "04800B"]

Abstract:
An object of the present invention is to provide a novel piston stroke adjustment apparatus for an internal combustion engine that can increase a temperature of an air-fuel mixture during a compression stroke to thus improve and stabilize combustion and also can prevent or cut down a reduction in a temperature of exhaust gas during an expansion stroke at the time of a start of the internal combustion engine. According to one aspect of the present invention, the piston stroke adjustment apparatus increases a mechanical compression ratio during the compression stroke to thus increase the temperature of the air-fuel mixture at a compression top dead center, and reduces a mechanical expansion ratio during the expansion stroke to thus prevent or cut down the reduction in the temperature of the exhaust gas at an expansion bottom dead center, at the time of the start of the internal combustion engine. According to this aspect, the piston stroke adjustment apparatus can increase the temperature of the air-fuel mixture at the compression top dead center to thus improve and stabilize the combustion, and also can prevent or cut down the reduction in the temperature of the exhaust gas at the expansion bottom dead center, at the time of the start of the internal combustion engine. Due to this effect, the piston stroke adjustment apparatus allows the internal combustion engine to improve startability thereof and also reduce an exhaust amount of exhaust harmful components.

Claim (Index 1):
A piston stroke adjustment apparatus for an internal combustion engine, comprising:\n a piston position change mechanism capable of changing a mechanical compression ratio and a mechanical expansion ratio by changing a stroke position of a piston in a four-cycle internal combustion engine; and a control unit configured to set the mechanical compression ratio to a high ratio relative to the mechanical expansion ratio and set the mechanical expansion ratio to a low ratio relative to the mechanical compression ratio by the piston position change mechanism at the time of a start of the internal combustion engine.

Metadata:
- Claim Count in Document: 16.0
- Percentile: 94.0
- Lexical Diversity: 3.67647
- Patent Class: 123.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['11907194', '13323976', '14435138', '15256343', '15629194']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.777110952912915
- 35 USC 102 Novelty (BERT): 0.5079220783389746
- Combined Prediction Score: 0.750192065455521
- Mean Citation Score: 325.6707120000001
- Max Citation Score: 333.2924799999999
- Similarity Product: 256.09505268810267

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

Dataset: test