JPS6345366U

JPS6345366U -

Info

Publication number: JPS6345366U
Application number: JP14000386U
Authority: JP
Priority date: 1986-09-12
Filing date: 1986-09-12
Publication date: 1988-03-26

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係わる４輪駆動車
アンチスキツドブレーキ装置の構成を示す図、第
２図は１チヤンネル分のブレーキ配管を示す図、
第３図はフラグＡ，Ｂの構成を示す図、第４図は
フラグＣ，Ｄの構成を示す図、第５図はＶＯＦＦ
フラグの構成を示す図、第６図はポート１，２，
Ａ，Ｂの構成を示す図、第７図は全体的な動作を
示すフローチヤート、第８図は車輪速パルスの取
り込みを示すフローチヤート、第９図は擬似車体
速度の計算を示すフローチヤート、第１０図はア
ンチスキツドブレーキＡＳＢ処理を示すフローチ
ヤート、第１１図はアウトプツト処理を示すフロ
ーチヤート、第１２図はΦＣＩ処理を示すフロー
チヤート、第１３図及び第１４図はそれぞれ擬似
車体速度ＶＰと車輪速度ＶＷとの関係を示す図、
第１５図ＡはＤＶ―Ｍ１特性図、第１５図ＢはＧ
Ｆ―Ｍ２特性図、第１５図ＣはＰＷ―Ｍ３特性図
、第１６図ＡはＤＶ―Ｍ４特性図、第１６図Ｂは
ＰＷ―Ｍ４特性図、第１７図はバルブをリリース
するパルス幅ＰＷを決定するための他の図、第１
８図はバルブをインレツトするための初回のパル
ス幅ＰＷＯと路面μとの関係を示す図、第１９図
は擬似車体速度ＶＰと車輪速度ＶＷとの関係を示
す図、第２０図はＧＦの最大値とバルブのインレ
ツト時間Ｔｉｎとの関係を示す図、第２１図は路
面μと減速度の閾値Ｇ×１との関係を示す図であ
る。１１，１２……車輪速センサ、１３，１４……
マスタシリンダ、１５……ブレーキ、１６……マ
イクロコンピユータ、２１……シヤツトバルブ（
ＳＶ）、２２……差圧スイツチ、２３……ＰＣＶ
、２５……インレツトバルブ（ＩＶ）、２６……
アウトレツトバルブ（ＯＶ）。 FIG. 1 is a diagram showing the configuration of an anti-skid brake device for a four-wheel drive vehicle according to an embodiment of the present invention, and FIG. 2 is a diagram showing brake piping for one channel.
Figure 3 shows the configuration of flags A and B, Figure 4 shows the configuration of flags C and D, and Figure 5 shows the configuration of flags C and D.
A diagram showing the configuration of the flags, Figure 6 shows ports 1, 2,
A diagram showing the configuration of A and B, FIG. 7 is a flowchart showing the overall operation, FIG. 8 is a flowchart showing the intake of wheel speed pulses, FIG. 9 is a flowchart showing calculation of pseudo vehicle speed, FIG. 10 is a flowchart showing anti-skid brake ASB processing, FIG. 11 is a flowchart showing output processing, FIG. 12 is a flowchart showing ΦCI processing, and FIGS. 13 and 14 are pseudo vehicle speed VP, respectively. A diagram showing the relationship between and wheel speed VW,
Figure 15A is the DV-M1 characteristic diagram, Figure 15B is the G
F-M2 characteristic diagram, Figure 15C is PW-M3 characteristic diagram, Figure 16A is DV-M4 characteristic diagram, Figure 16B is PW-M4 characteristic diagram, and Figure 17 is pulse width PW for releasing the valve. Another diagram for determining, 1st
Figure 8 shows the relationship between the initial pulse width PWO for inleting the valve and the road surface μ, Figure 19 shows the relationship between the pseudo vehicle speed VP and the wheel speed VW, and Figure 20 shows the relationship between the maximum GF and the road surface μ. FIG. 21 is a diagram showing the relationship between the value and the valve inlet time Tin, and FIG. 21 is a diagram showing the relationship between the road surface μ and the deceleration threshold G×1. 11, 12... Wheel speed sensor, 13, 14...
Master cylinder, 15...Brake, 16...Microcomputer, 21...Shut valve (
SV), 22... Differential pressure switch, 23... PCV
, 25... Inlet valve (IV), 26...
Outlet valve (OV).

Claims

[Scope of utility model registration request]

In a brake system for a four-wheel drive vehicle in which diagonally opposite front and rear wheels are provided with the same brake piping, a wheel speed sensor detects a wheel speed VW from the rotation of the wheel, and a wheel output from the wheel speed sensor. deceleration calculating means for calculating the deceleration GF of the speed; pseudo vehicle speed calculating means for separating the pseudo vehicle speed VP from the wheel speed VW according to the deceleration of the wheel speed output from the deceleration detecting means; VP-
1. An anti-skid brake device for a four-wheel drive vehicle, comprising means for opening a release valve for a set time to loosen the braking force of the anti-skid brake when the brake force of the anti-skid brake is greater than a set value.