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1. 发明公开

EP1101927A1 INTAKE A/F CONTROL DEVICE OF OUTBOARD ENGINE 有权
标题翻译： KONTROLLVORRICHTUNGFÜRDIE LUFT / BRENNSTOFFZUFUHR EINES AUSSENBORDMOTORS
公开(公告)号：EP1101927A1
公开(公告)日：2001-05-23
申请号：EP99933249.7
申请日：1999-08-03
申请人： Honda Giken Kogyo Kabushiki Kaisha
发明人： YOSHIDA, Hiroyuki , KAWASAKI, Toyokazu , FUKUDA, Yoshihiko
IPC分类号： F02M25/07 , F01N3/28 , F02D41/14 , F02D43/00 , F02D45/00
CPC分类号： F02M23/04 , F01N13/008 , F01N2590/021 , F02B61/045 , F02D35/0061 , F02D41/1454 , F02D41/1456 , F02M7/24 , Y02T10/146
摘要： In an engine intake A/F ratio control system in an outboard engine system, a secondary air passage (P) for supplying secondary air for regulating the A/F ratio of an air-fuel mixture is connected to a carburetor (33) in an intake system of an engine (E), and a duty control valve (68) is connected to the secondary air passage (P). A duty control unit (92) is connected to the duty control valve (68) for controlling the duty ratio of a pulse applied to a coil (76) of the duty control valve (68), and an LAF sensor (94) is mounted to an exhaust system for detecting an A/F ratio of an exhaust gas to input a detection signal proportional to the A/F ratio of the exhaust gas to the duty control unit (92). Thus, in any of a case when the tolerance of the purifying rate of the catalytic converter is set relatively widely with an engine output taken into consideration to a certain extent, and a case when the set range is shifted to a rich side of the A/R ratio with the engine output taken into serious consideration, the A/F ratio of the exhaust gas can be controlled properly to a desired target value.
摘要翻译：在舷外发动机系统的发动机进气A / F比控制系统中，将用于调节空气 - 燃料混合物的A / F比的二次空气的二次空气通路（P）连接到化油器（33）发动机（E）的进气系统和作业控制阀（68）连接到二次空气通路（P）。负载控制单元（92）连接到占空比控制阀（68），用于控制施加到占空比控制阀（68）的线圈（76）的脉冲的占空比，并且安装LAF传感器（94）涉及一种用于检测排气的A / F比以输出与废气的A / F比与占空比控制单元（92）成比例的检测信号的排气系统。因此，在一定程度上考虑到发动机输出的情况下，催化转化器的净化率的公差设定得相对广泛的情况，以及设定范围向A的浓侧偏移的情况 / R比与引擎输出考虑在内，可以将废气的A / F比适当地控制到期望的目标值。

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