Fuel injection control device
By combining electromotive force detection and time point detection in the fuel injection control device, the detection method is selected according to the injection quantity, and through correction coefficient calculation, the problem of non-linear injection quantity in the partial lift area is solved, and high accuracy and wide detection range are achieved. Taking both into consideration and improving the effect of fuel injection control.
Inactive Publication Date: 2019-02-12
TOYOTA JIDOSHA KK
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Problems solved by technology
If the injection amount dispersion becomes large, exhaust emissions and drivability may deteriorate
Method used
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no. 1 Embodiment approach
[0029] use Figure 1 to Figure 8 The first embodiment of the present disclosure will be described. figure 1 The illustrated fuel injection system 100 includes a plurality of fuel injection valves 10 and a fuel injection control device 20 . The fuel injection control device 20 controls the opening and closing of the plurality of fuel injection valves 10 to control fuel injection into the combustion chamber 2 of the internal combustion engine E. As shown in FIG. A plurality of fuel injection valves 10 are mounted on an ignition type internal combustion engine E, for example, a gasoline engine, and directly inject fuel into each of the plurality of combustion chambers 2 of the internal combustion engine E. A mounting hole 4 penetrating coaxially with the axis C of the cylinder is formed in the cylinder head 3 forming the combustion chamber 2 . The fuel injection valve 10 is inserted and fixed in the mounting hole 4 so that the tip thereof is exposed in the combustion chamber 2...
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This fuel injection control device includes: a valve closing detection unit (54) which uses one detection method from among an electromotive force amount detection method and a timing detection methodto detect a valve closing timing; a selection unit (21) which selects which of the detection methods among the electromotive force amount detection method and the timing detection method is to be used to detect the valve closing timing; and a correction unit (21) which calculates a correction coefficient for correcting a requested injection amount such that the difference between an estimated injection amount and the requested injection amount is reduced. If the calculation of the correction coefficient is incomplete, the selection unit selects the electromotive force amount detection methodregardless of the value of the requested injection amount.
Description
[0001] Cross-references to related applications [0002] This application is based on Japanese Patent Application No. 2016-93316 filed on May 6, 2016, the entire content of which is incorporated herein. technical field [0003] The present disclosure relates to a fuel injection control device including an electromagnetically driven fuel injection valve. Background technique [0004] The fuel injection control device controls injection from an electromagnetically driven fuel injection valve included in the internal combustion engine. Specifically, the fuel injection control device calculates a required injection amount based on the operating state of the internal combustion engine, and energizes the coil with an injection command pulse having a pulse width corresponding to the required injection amount. This is controlled so that a magnetic attraction force is generated in the coil, and the valve body of the fuel injection valve is opened and driven to inject a required inje...
Claims
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IPC IPC(8): F02D41/34F02D41/20F02M51/00F02M57/02
CPCF02D41/20F02D41/247F02D41/401F02D2041/2051F02D2041/2055F02D2041/2058F02D2200/0614F02D2200/063F02M51/0685Y02T10/40
Inventor 佐竹信行村濑荣二中野智洋
Owner TOYOTA JIDOSHA KK