JPS63128425U

JPS63128425U -

Info

Publication number: JPS63128425U
Application number: JP2124287U
Authority: JP
Priority date: 1987-02-16
Filing date: 1987-02-16
Publication date: 1988-08-23
Anticipated expiration: 2002-02-16
Also published as: JPH0544742Y2

Description

[Brief explanation of the drawing]

第１図は本考案の構成を示す機能ブロツク図、
第２図ないし第５図は本考案の実施例に係り、第
２図は実施例による回路構成を示すブロツク図、
第３図は熱線流量計による出力特性と補正後の特
性を示す特性線図、第４図は初期値の記憶動作を
示す流れ図、第５図は補正演算処理を示す流れ図
、第６図はプラグイン型熱線抵抗の汚れ状態を示
す外観説明図である。１１……熱線流量計、１１Ａ……熱線抵抗、１
２……スロツトルバルブスイツチ、１３……補正
制御装置、１４……噴射量演算装置、イ……正常
時特性、ロ……汚れ発生時特性、ハ……補正特性
。 Figure 1 is a functional block diagram showing the configuration of the present invention.
2 to 5 relate to an embodiment of the present invention, and FIG. 2 is a block diagram showing a circuit configuration according to the embodiment;
Figure 3 is a characteristic diagram showing the output characteristics and characteristics after correction by the hot wire flowmeter, Figure 4 is a flowchart showing the initial value storage operation, Figure 5 is a flowchart showing the correction calculation process, and Figure 6 is the plug FIG. 3 is an explanatory external view showing a dirty state of the in-type hot wire resistor. 11...Hot wire flowmeter, 11A...Hot wire resistance, 1
2...Throttle valve switch, 13...Correction control device, 14...Injection amount calculation device, A...Normal characteristics, B...Contamination occurrence characteristics, C...Correction characteristics.

Claims

[Scope of utility model registration request]

A hot-wire flowmeter including a hot-wire resistance installed in the intake passage of an internal combustion engine, and when the hot-wire resistance of the hot-wire flowmeter is in a normal state, the flow rate from the hot-wire flowmeter when the throttle valve is fully closed and at a predetermined opening degree. a storage means for storing output characteristic values as initial values A ₀ and B ₀ ; and a characteristic output from the hot wire flowmeter when the throttle valve is fully closed and at a predetermined opening degree after the hot wire flowmeter is used. When the difference |A ₁ −A ₀ | between the characteristic value A ₁ and the initial value A ₀ among the values A ₁ and B ₁ becomes a predetermined value or more, it is determined that the hot wire resistor is contaminated. a determination means; a correction value calculation means for calculating a correction value α that brings the output characteristics from the hot wire flowmeter closer to normal characteristics when the dirt determination means determines that the occurrence of contamination has occurred; and the correction value calculation means A characteristic correction control device for a hot-wire flowmeter, comprising a correction means for adding and correcting the output characteristic from the hot-wire flowmeter by the correction value α based on the correction value α from the hot-wire flowmeter.