JPS6345369U

JPS6345369U -

Info

Publication number: JPS6345369U
Application number: JP14000686U
Authority: JP
Priority date: 1986-09-12
Filing date: 1986-09-12
Publication date: 1988-03-26

Description

[Brief explanation of drawings]

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ＧＦ―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１８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１
９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 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 each a simulated vehicle body. A diagram showing the relationship between speed VP and wheel speed VW, Fig. 15A is a DV-M1 characteristic diagram, Fig. 15B
is the GF-M2 characteristic diagram, Figure 15C is the PW-M3 characteristic diagram, Figure 16A is the DV-M4 characteristic diagram, Figure 16B is the PW-M4 characteristic diagram, and Figure 17 is the pulse width to release the valve. Other diagrams for determining PW,
Figure 18 is a diagram showing the relationship between the initial pulse width PWO for inleting the valve and the road surface μ.
Figure 9 is a diagram showing the relationship between the pseudo vehicle speed VP and wheel speed VW, Figure 20 is a diagram showing the relationship between the maximum value of GF and the valve inlet time Tin, and Figure 21 is a diagram showing the relationship between the road surface μ and the deceleration threshold. It is a figure showing the relationship with Gx1. 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 wheels and rear wheels are provided with the same brake piping, a brake pedal, a brake detection means for detecting depression of the brake pedal, and a wheel speed VW based on wheel rotation are used. A wheel speed sensor that detects
A deceleration calculating means for calculating the deceleration GF of the wheel speed output from the wheel speed sensor and a deceleration detecting means indicate that if the deceleration of the wheel speed is larger than a positive set value, it is a sign of wheel slipping. An anti-skid brake device for a four-wheel drive vehicle, characterized in that the anti-skid brake device for a four-wheel drive vehicle is equipped with a pseudo-vehicle speed calculating means that determines that the pseudo-vehicle speed VP is separated from the wheel speed VW and holds the pseudo-vehicle speed VW at a constant value.