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2. 发明申请

US20110191006A1 ALCOHOL CONCENTRATION ESTIMATION AND DETECTION APPARATUS FOR AN ENGINE 有权
标题翻译：酒精浓度估算和发动机检测装置
公开(公告)号：US20110191006A1
公开(公告)日：2011-08-04
申请号：US13011287
申请日：2011-01-21
申请人： Kenji NISHIDA , Kazuto FUKUZAWA , Tetsuya KANEKO , Kenjiro SAITO
发明人： Kenji NISHIDA , Kazuto FUKUZAWA , Tetsuya KANEKO , Kenjiro SAITO
IPC分类号： F02D41/30 , G01N33/22 , F02D41/02
CPC分类号： F02D41/0025 , F02D19/084 , F02D19/088 , F02D41/0097 , F02D41/1497 , F02D41/2422 , F02D2200/0612 , F02P5/1502 , Y02T10/36 , Y02T10/46
摘要： In an alcohol concentration estimation apparatus for an engine, a first crank angular speed (ω1) within a first predetermined interval overlapping with the compression top dead center is calculated, and a first variation amount (Δω1) is calculated by subtracting ω1 from an average engine speed. A second crank angular speed (ω2) within a second predetermined interval overlapping with the combustion bottom dead center is calculated, and a second variation amount (Δω2) is calculated by subtracting ω1 from ω2. In a relationship between air fuel ratio A/F and an indicated mean effective pressure (IMEP)/charging efficiency (ηc) of the engine when the engine is operated with a predetermined fuel injection map indicating a relationship between A/F and IMEP/ηc for each desired alcohol concentration, IMEP/ηc is substituted by Δω2/Δω1 ratio to estimate an alcohol concentration in fuel. The alcohol concentration estimation apparatus eliminates requirement of sensors for detecting an intake air mass.
摘要翻译：在用于发动机的酒精浓度估计装置中，计算与压缩上止点重叠的第一预定间隔内的第一曲柄角速度（ω1），并且通过从压缩上死点中减去ω1来计算第一变化量（＆Dgr;ω1）平均发动机转速。计算与燃烧下死点重叠的第二预定间隔内的第二曲柄角速度（ω2），并且通过从ω2减去ω1来计算第二变化量（＆Dgr;ω2）。在使用指示A / F和IMEP之间的关系的预定燃料喷射图来操作发动机时，空燃比A / F与发动机的指示平均有效压力（IMEP）/充电效率（eegr）之间的关系对于每个所需的醇浓度，IMEP / eegr; c被＆Dgr;ω2/＆Dgr;ω1比率代替以估计燃料中的酒精浓度。酒精浓度推定装置消除了对用于检测进气质量的传感器的要求。

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