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1. 发明公开

EP3561271A1 SYSTEM FOR MEASURING OUTPUT OF LARGE-SIZED LOW-SPEED TWO-STROKE ENGINE AND METHOD FOR MEASURING OUTPUT OF LARGE-SIZED LOW-SPEED TWO-STROKE ENGINE 有权
公开(公告)号：EP3561271A1
公开(公告)日：2019-10-30
申请号：EP19170457.6
申请日：2019-04-23
申请人： Jung, Kyun Sik , Lee, Su Kyoung
发明人： Jung, Kyun Sik , Lee, Su Kyoung
IPC分类号： F02D35/02 , F02D39/04 , F02D41/00
摘要： An output measurement system of a large-sized low-speed two-stroke engine according to an embodiment of the present disclosure is an output measurement system of a large-sized low-speed two-stroke engine that measures output of an engine for one cycle. The output measurement system includes: a pressure sensor unit that detects individual combustion pressure of cylinders; an angle sensor unit that detects rotation angles of a crankshaft with a Z-pulse thereof matched with an actual TDC of a predetermined reference cylinder; and an output measurer that collects combustion pressure of cylinders at the rotation angles of the crankshaft from the pressure sensor unit and the angle sensor unit, shows a plurality of graphs about combustion pressure of the cylinders at the rotation angles of the crankshaft, combustion pressure of the cylinders at combustion chamber volumes, and pressure change rates of the cylinders at the rotation angles of the crankshaft, finds out the position of a compression TDC and a loss of angle of the reference cylinder from the plurality of graphs, adjusts points in time when the angle sensor unit detects the rotation angle of the crankshaft for the other cylinders except for the reference cylinder, and then measures output of the cylinders.

2. 发明公开

EP3561270A2 METHOD FOR COLLECTING 1-CYCLE DATA FOR OUTPUT MEASUREMENT AND COMBUSTION ANALYSIS OF LARGE-SIZED LOW-SPEED 4-STROKE ENGINE 审中-公开
公开(公告)号：EP3561270A2
公开(公告)日：2019-10-30
申请号：EP19170459.2
申请日：2019-04-23
申请人： Jung, Kyun Sik , Lee, Su Kyoung
发明人： Jung, Kyun Sik , Lee, Su Kyoung
IPC分类号： F02D17/02 , F02D35/02 , F02D41/00
摘要： A method for collecting 1-cycle data for output measurement and combustion analysis of a large-sized low-speed 4-stroke engine according to an embodiment of the present disclosure includes: creating a graph about compression pressure of a predetermined reference cylinder at rotation angles of a crankshaft by blocking fuel for the reference cylinder and collecting compression pressure data from the reference cylinder; creating a graph about pressure change rates of the reference cylinder at rotation angles of the crankshaft by differentiating the compression pressure data collected from the reference cylinder with respect to the rotation angle of the crankshaft; detecting the position of a compression TDC from the graph about the compression change rates of the reference cylinder at the rotation angles of the crankshaft, and storing the rotation angle value of the crankshaft corresponding to the detected position of the compression TDC; determining a start position of an intake/exhaust TDC by adding a rotation angle value of the crankshaft corresponding to 0.5 cycles to the rotation angle value of the crankshaft corresponding to the position of the compression TDC; and collecting compression pressure of the reference cylinder at rotation angles of the crankshaft for one cycle from the start position of the intake/exhaust TDC.

3. 发明公开

EP3561270A3 METHOD FOR COLLECTING 1-CYCLE DATA FOR OUTPUT MEASUREMENT AND COMBUSTION ANALYSIS OF LARGE-SIZED LOW-SPEED 4-STROKE ENGINE 审中-公开
公开(公告)号：EP3561270A3
公开(公告)日：2020-01-15
申请号：EP19170459.2
申请日：2019-04-23
申请人： Jung, Kyun Sik , Lee, Su Kyoung
发明人： Jung, Kyun Sik , Lee, Su Kyoung
IPC分类号： F02D17/02 , F02D35/02 , F02D41/00
摘要： A method for collecting 1-cycle data for output measurement and combustion analysis of a large-sized low-speed 4-stroke engine according to an embodiment of the present disclosure includes: creating a graph about compression pressure of a predetermined reference cylinder at rotation angles of a crankshaft by blocking fuel for the reference cylinder and collecting compression pressure data from the reference cylinder; creating a graph about pressure change rates of the reference cylinder at rotation angles of the crankshaft by differentiating the compression pressure data collected from the reference cylinder with respect to the rotation angle of the crankshaft; detecting the position of a compression TDC from the graph about the compression change rates of the reference cylinder at the rotation angles of the crankshaft, and storing the rotation angle value of the crankshaft corresponding to the detected position of the compression TDC; determining a start position of an intake/exhaust TDC by adding a rotation angle value of the crankshaft corresponding to 0.5 cycles to the rotation angle value of the crankshaft corresponding to the position of the compression TDC; and collecting compression pressure of the reference cylinder at rotation angles of the crankshaft for one cycle from the start position of the intake/exhaust TDC.

4. 发明公开

EP3561475A1 COMBUSTION ANALYSIS APPARATUS FOR LARGE-SIZED LOW-SPEED ENGINE AND METHOD FOR DETERMINING COMBUSTION STATE OF ENGINE USING THE SAME 有权
公开(公告)号：EP3561475A1
公开(公告)日：2019-10-30
申请号：EP19170460.0
申请日：2019-04-23
申请人： Jung, Kyun Sik , Lee, Su Kyoung
发明人： Jung, Kyun Sik , Lee, Su Kyoung
IPC分类号： G01M15/05 , G01M15/06 , G01M15/08 , F02D35/02
摘要： A combustion analysis apparatus of a large-sized low-speed engine is a combustion analysis apparatus of a large-sized low-speed engine that performs combustion analysis on an engine for one cycle, the apparatus including a combustion analyzer that collects combustion pressure of cylinders at rotation angles of a crankshaft from signal about individual combustion pressure of the cylinders and a signal about a rotation angle of the crankshaft that are input from the outside, and then analyzes and shows a combustion chamber volume, a pressure change rate, a heat generation rate, and combustion gas, for the cylinders, in a plurality of graphs, in which the graphs include: a Pθ graph showing combustion pressure of the cylinders at the rotation angles of the crankshaft; a PV graph showing combustion pressure at combustion chamber volumes of the cylinders; a dP graph showing pressure change rates of the cylinders at the rotation angles of the crankshaft; a heat generation rate graph showing heat generation rates of the cylinder at the rotation angles of the crankshaft; and a combustion gas temperature graph showing combustion gas temperature of the cylinders at the rotation angles of the crankshaft.
According to embodiments of the present disclosure, combustion analysis on an engine is performed in various ways by providing a plurality of graphs and the combustion state of the engine is examined through the combustion analysis, so it is possible to check the accurate combustion state of the engine and accordingly it is possible to improve the lifespan and fuel consumption rate of the engine by maintaining the engine in an optimal state.

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