Invention Grant
- Patent Title: Fuel injection amount control apparatus for an internal combustion engine
-
Application No.: US13701922Application Date: 2010-06-07
-
Publication No.: US09726103B2Publication Date: 2017-08-08
- Inventor: Yasushi Iwazaki , Hiroshi Miyamoto , Tatsuro Shimada , Isao Nakajima , Yoshihisa Oda , Takuya Matsumoto , Masashi Hakariya
- Applicant: Yasushi Iwazaki , Hiroshi Miyamoto , Tatsuro Shimada , Isao Nakajima , Yoshihisa Oda , Takuya Matsumoto , Masashi Hakariya
- Applicant Address: JP Toyota-shi
- Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
- Current Assignee Address: JP Toyota-shi
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- International Application: PCT/JP2010/059988 WO 20100607
- International Announcement: WO2011/155073 WO 20111215
- Main IPC: B60T7/12
- IPC: B60T7/12 ; G05D1/00 ; F02D41/30 ; F02D41/00 ; F02D41/10 ; F02D41/18 ; F02D41/14

Abstract:
A fuel injection amount control apparatus comprises an air-fuel ratio sensor disposed between an exhaust gas merging portion and an upstream catalyst. The control apparatus performs a feedback correction on an amount of fuel to be injected by the fuel injection valve so that an air-fuel ratio represented by the output value of the upstream air-fuel ratio sensor becomes equal to a target air-fuel ratio set at stoichiometric air-fuel ratio. The control apparatus obtains an air-fuel ratio imbalance indicating value, which becomes larger as a difference in air-fuel ratio of each of the mixtures supplied to each of the combustion chambers among the cylinders becomes larger, and performs an increasing correction to the instructed fuel injection amount in such a manner that an air-fuel ratio determined by the instructed fuel injection amount becomes richer than the stoichiometric air-fuel ratio as the obtained air-fuel ratio imbalance indicating value increases.
Public/Granted literature
- US20130144510A1 FUEL INJECTION AMOUNT CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE Public/Granted day:2013-06-06
Information query