Fuel feed controller for internal-combustion engine

内燃機関の燃料供給制御装置

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel feed controller for an internal-combustion engine excellent in startup characteristics, reduced in fuel leakage from an injector while the engine is stopped and improved in emission gas during startup. <P>SOLUTION: The fuel feed controller for an internal combustion engine for feeding the fuel in a fuel tank to each cylinder through fuel pipes comprises an intake-air temperature detecting means for detecting the temperature of intake-air taken into the engine, a fuel temperature estimating part for estimating the maximum estimated fuel temperature in the fuel piping on the basis of the intake-air temperature, a remaining fuel pressure setting correction means for setting a target remaining fuel pressure on the basis of the maximum estimated fuel temperature, and a fuel pressure reducing means for reducing fuel pressure in the fuel pipes until it reaches the target remaining fuel pressure. <P>COPYRIGHT: (C)2005,JPO&NCIPI
【課題】始動時の良好な始動性を有し、内燃機関停止中のインジェクタからの燃料漏れを低減し、始動時の排出ガスを改善することができる内燃機関の燃料供給制御装置を提供する。 【解決手段】燃料供給制御装置は、燃料タンク内の燃料を燃料配管を介して各気筒に供給する内燃機関の燃料供給制御装置において、内燃機関に吸入された空気の吸気温度を検出する吸気温度検出手段と、吸気温度に基づき燃料配管内の燃料の推定燃料温度最大値を推定する燃料温度推定部と、推定燃料温度最大値に基づき目標燃料残圧を設定する燃料残圧設定補正手段と、設定された目標燃料残圧に達するまで燃料配管内の燃料圧力を低減させる燃料圧力低減手段とを備える。 【選択図】 図1

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    JP-2009074491-AApril 09, 2009Toyota Motor Corp, トヨタ自動車株式会社Cooling fan control device for radiator