JPS63134867U

JPS63134867U -

Info

Publication number: JPS63134867U
Application number: JP2759987U
Authority: JP
Priority date: 1987-02-26
Filing date: 1987-02-26
Publication date: 1988-09-05

Description

[Brief explanation of the drawing]

第１図は本実施例の概略構成図、第２図は本実
施例の外観図、第３図は本実施例の制御ブロツク
図、第４図はブレーキホールド作動のフローチヤ
ート、第５図は発進時におけるブレーキホールド
解除フローチヤート、第６図はパーキングブレー
キ時におけるブレーキホールド解除フローチヤー
ト、第７図は通電、無通電の際の電磁バルブの開
閉状態を示す図である。２１……クラツチ位置センサ、３２……メイン
シヤフト回転センサ（車速センサ）、４０……マ
イクロコンピユータ、４０Ａ……バルブ制御手段
、４０Ｂ……ブレーキ解除条件判定手段、６２…
…パーキングブレーキ検出スイツチ、６３……サ
ービスブレーキスイツチ、６４……ブレーキペダ
ル、６５……ブレーキバルブ、６６……エアリザ
ーバ、６７……エアブースタ、Ｔ……通路切換バ
ルブ。 Fig. 1 is a schematic configuration diagram of this embodiment, Fig. 2 is an external view of this embodiment, Fig. 3 is a control block diagram of this embodiment, Fig. 4 is a flowchart of brake hold operation, and Fig. 5 is a flowchart of brake hold operation. FIG. 6 is a flowchart for releasing the brake hold at the time of starting, FIG. 6 is a flowchart for releasing the brake hold at the time of parking brake, and FIG. 7 is a diagram showing the opening and closing states of the electromagnetic valve when energized and de-energized. 21...Clutch position sensor, 32...Main shaft rotation sensor (vehicle speed sensor), 40...Microcomputer, 40A...Valve control means, 40B...Brake release condition determination means, 62...
... Parking brake detection switch, 63 ... Service brake switch, 64 ... Brake pedal, 65 ... Brake valve, 66 ... Air reservoir, 67 ... Air booster, T ... Passage switching valve.

Claims

[Scope of utility model registration request]

A passage switching valve is provided to selectively communicate the brake air booster with the air pressure source and the brake valve, while means for detecting depression and release of the brake pedal, means for detecting vehicle speed, and connection of the clutch at the time of starting are provided. In a brake hold device equipped with a detection means and a valve control means that switches the valve to an air pressure source when the vehicle speed is zero when the brake pedal is released, the clutch is connected when the parking brake is detected or when the vehicle is started. 1. A brake hold device comprising brake release condition determining means for switching a passage switching valve to a brake valve side via a valve control means when detecting this.