JPS59154426U

JPS59154426U - 4 wheel drive vehicle

Info

Publication number: JPS59154426U
Application number: JP4833683U
Authority: JP
Inventors: 邦彦鈴木
Original assignee: 日産自動車株式会社
Priority date: 1983-04-01
Filing date: 1983-04-01
Publication date: 1984-10-17

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は操向車輪の操舵角が大きい場合の路面における
前車輪と後車輪とのそれぞれの回転半径の差異を示す車
両の平面図、第２図はこの考案に係る４輪駆動車の一実
施例を示す骨組図、第３図は２輪４輪切換手段を示す部
分断面概略図、第４図は第２図に示す一実施例の信号系
統を示すブロック図、第５図は他の実施例に係る４輪駆
動車の骨組図、第６図は第５図に示す他の実施例の信号
系統を示すブロック図である。１・・・・・・車体、１６ａ、１６ｂ・・・・・・後車
輪、２３・・・・・・ソレノイド、２５ａ、　２５ｂ・
・・・・・前車輪、２６・・・・・・２輪４輪切換手段
、２７・・・・・・２離４輪切換バルブ、２９・・・・
・・油圧多□板クラッチ、３０・・・・・・操舵角検出
手段、３１・・・・・・２輪４輪切換検出手段、３２・
・・・・・電子制御回路、３３・・・・・・摩擦係数演
算装置、３５・・・・・・減速度検出手段、４０・・・
・・・車速検出　　　　゛手段、４１・・・・・・垂直
荷重検出手段、４２・・・・・・操舵力検出手段。Figure 1 is a plan view of a vehicle showing the difference in the respective turning radii of the front wheels and rear wheels on a road surface when the steering angle of the steering wheel is large, and Figure 2 is a diagram of a four-wheel drive vehicle according to this invention. FIG. 3 is a partial cross-sectional schematic diagram showing the two-wheel/four-wheel switching means, FIG. 4 is a block diagram showing the signal system of one embodiment shown in FIG. 2, and FIG. FIG. 6 is a schematic diagram of the four-wheel drive vehicle according to the embodiment. FIG. 6 is a block diagram showing a signal system of another embodiment shown in FIG. 1... Vehicle body, 16a, 16b... Rear wheel, 23... Solenoid, 25a, 25b.
...Front wheel, 26...Two-wheel four-wheel switching means, 27...Two-way four-wheel switching valve, 29...
... Hydraulic multi-plate clutch, 30 ... Steering angle detection means, 31 ... Two-wheel four-wheel switching detection means, 32.
...Electronic control circuit, 33...Friction coefficient calculating device, 35...Deceleration detection means, 40...
...Vehicle speed detection means, 41... Vertical load detection means, 42... Steering force detection means.

Claims

[Scope of utility model registration request]

(1) A vehicle body, a front wheel and a rear wheel that are rotatably supported by the vehicle body, and two wheels that are connected to the front wheels and rear wheels, respectively, and that switch the vehicle to either a two-wheel drive system or a four-wheel drive system. A four-wheel drive vehicle comprising: a deceleration detecting means for detecting deceleration of the vehicle; a two-wheel/four-wheel switching detecting means for detecting a switching state of the two-wheel/four-wheel switching means; When signals are input from the speed detection means and the two-wheel/four-wheel switching detection means, and the deceleration of the vehicle exceeds a predetermined value, and the two-wheel/four-wheel switching means is operating to switch to the two-wheel drive mode, the two-wheel drive mode is activated. A four-wheel drive vehicle comprising: an electronic control circuit that controls two-wheel/four-wheel switching means to switch from a drive system to a four-wheel drive system.

(2) The four-wheel drive vehicle is provided with a friction coefficient detection means for detecting a friction coefficient between the steered wheels and the road surface, and the electronic control circuit receives a signal from the friction coefficient detection means and detects the friction coefficient. When the value is low, the predetermined value of the deceleration is also controlled so that when the value is low, the two-wheel/four-wheel switching means is switched from the two-wheel drive system to the four-wheel drive system. A four-wheel drive vehicle according to claim 1 of the patent registration claim.