FUEL INJECTION PUMP

• Main Authors: NANKO MASAKI, OKAMOTO RYOSUKE, HATTORI TETSU, SHIBA YUJI
• Format: Patent
• Language: English; Korean
• Published: 18.03.2020
• Subjects: BLASTING; COMBUSTION ENGINES; CRANKCASE VENTILATING; ENGINE PLANTS IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; LUBRICATING INTERNAL COMBUSTION ENGINES; LUBRICATING OF MACHINES OR ENGINES IN GENERAL; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

연료 분사 펌프의 컨트롤 랙에 수분이 부착되어 상기 수분이 동결함에 따른 엔진의 시동 불량을 방지하는 것을 과제로 한다. 디젤 엔진(30)에 마련되는 연료 분사 펌프(1)로서, 펌프 헤드(3)와 펌프 하우징(2) 사이에 형성되는 랙 룸(5)에 배치되어 연료 분사량을 조정하는 컨트롤 랙(20); 펌프 하우징(2)에 형성되는 전달축 홀(2C)에 회전 지지되는 전달축(49); 및 펌프 하우징(2)에 형성되어 전달축(49)과 전달축 홀(2C) 사이에 윤활유를 압송하는 윤활유 통로(2D)를 구비하고; 전달축(49)에는 윤활유 통로(2D)에 압송되는 윤활유의 일부가 통과하는 유로(40)가 형성되고, 유로(40)의 제1 개구부(41A)는 윤활유 통로(2D)와 연통되고, 유로(40)의 제2 개구부(42A)는 컨트롤 랙(20) 근방의 전달축(49) 상부의 외주면에 형성된다. The present invention addresses the problem of preventing engine start faults caused by moisture adhering to a control rack of a fuel injection pump and the moisture freezing. This fuel injection pump (1) installed in a diesel engine (30) is provided with: a control rack (20) which is disposed in a rack chamber (5) formed between a pump head (3) and a pump housing (2), and adjusts the fuel injection amount; a transmission shaft (49) rotatably supported in a transmission shaft hole (2C) formed in the pump housing (2); and a lubricant passage (2D) which is formed in the pump housing (2) and forcibly feeds a lubricant between the transmission shaft (49) and the transmission shaft hole (2C). An oil path (40), through which a portion of the lubricant forcibly fed through the lubricant passage (2D) passes, is formed in the transmission shaft (49), a first opening part (41A) of the oil path (40) communicates with the lubricant passage (2D), and a second opening part (42A) of the oil path (40) is formed on the outer peripheral surface of an upper portion of the transmission shaft (49) in the proximity of the control rack (20).