FUEL CONTROL DEVICE INCLUDING DEVICE MEASURING QUANTITY OF AIR FLOWING INTO CYLINDER OF ENGINE

PROBLEM TO BE SOLVED: To solve a problem that an air fuel ratio is not set to a desired air fuel ratio since steady-state errors exist in an engine intake air quantity measured by a H/W sensor or the like and a cylinder flow in an air quantity calculated based on estimated intake pipe pressure when intake efficiency is different in right and left banks. SOLUTION: This fuel control device includes: a means 502 operating an air quantity passing through a throttle valve; a means 505 acquiring a cylinder flow in the air quantity QAR flowing into the cylinder of the engine based on estimated pressure PMMHG at a throttle valve downstream side, engine speed Ne, an intake air temperature THA, and intake efficiency η defined by map search from the downstream side estimated pressure and engine speed; and a means 506 acquiring the cylinder flow in air quantities QAR(0), QAR(1) flowing into the cylinders of right and left cylinder groups based on intake efficiency η0, η1 of the right and left cylinder groups defined by map search at right and left valve timing IN CAREA(0), (1), and an acquired cylinder flow in the air quantity QAR. COPYRIGHT: (C)2011,JPO&INPIT