GAS CONCENTRATION MEASUREMENT DEVICE

• Main Authors: ANDO AKIHIRO, AOCHI TAKANOBU, MORITA TOSHIKI
• Format: Patent
• Language: English; Japanese
• Published: 18.05.2017
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MEASURING; MECHANICAL ENGINEERING; PHYSICS; TESTING; WEAPONS

PROBLEM TO BE SOLVED: To provide a gas concentration measurement device with which it is possible to receive a portion of irradiated light and measure the concentration of a fuel gas with high accuracy, even when the intensity distribution of the irradiated light changes.SOLUTION: Provided is a gas concentration measurement device 10 for an internal combustion engine 1 that measures the concentration of a fuel gas in the combustion chamber 14 of the internal combustion engine 1 on the basis of the attenuation amount of the intensity of light (infrared ray) with which the inside of the combustion chamber 14 of the internal combustion engine 1 is irradiated. The gas concentration measurement device 10 comprises an irradiation fiber 5 for irradiating the inside of the combustion chamber 14, a reflection member 41 for reflecting the light irradiated by the irradiation fiber 5, and a light-receiving fiber 6 for receiving the light reflected by the reflection member 41, the reflection member 41 being an irregular reflection member that reflects the irradiated light irregularly.SELECTED DRAWING: Figure 2 【課題】照射される光の強度分布が変化したとしても、この光の一部を受光して、精度良く燃料ガスの濃度を計測することができるガス濃度計測装置を提供する。【解決手段】内燃機関１の燃焼室１４内に照射した光（赤外線）の強度の減衰量に基づいて、内燃機関１の燃焼室１４内の燃料ガスの濃度を計測する内燃機関１のガス濃度計測装置１０である。ガス濃度計測装置１０は、燃焼室１４内に光を照射する照射ファイバー５と、照射ファイバー５で照射した光を反射する反射部材４１と、反射部材４１で反射した光を受光する受光ファイバー６と、を備えており、反射部材４１は、照射された光を乱反射させる乱反射部材である。【選択図】図２