阅读说明：本技术 一种四轮驱动车辆四轮中位回正系统 (Positive system is returned in position in a kind of four-wheel drive vehicle four-wheel ) 是由 张青军 花义峰 于 2019-07-31 设计创作，主要内容包括：本发明公开的一种四轮驱动车辆四轮中位回正系统,包括：驱动一对前轮转向的前转向油缸和驱动一对后轮转向的后转向油缸以及按照控制路径通过油管与前转向油缸、后转向油缸连接的第一至第八电磁阀；所述第一至第八电磁阀还通过油管与油泵站连接并均与一角度控制ECU连接,由角度控制ECU控制导通与关闭,实现前轮中位回正、后轮中位回正、四轮转向和蟹行。本发明实现一键四轮中位回正,与现有技术相比,结构简单,降低了驾驶员操作的难度,延长了车轴使用寿命,减少了轮胎异常磨损。另外本发明采用前轮角度传感器、后轮角度传感器检测前轮、后轮的回正位置并反馈至角度控制ECU,其中位回正精度达到±0.3°。(Positive system is returned in position in a kind of four-wheel drive vehicle four-wheel disclosed by the invention, comprising: drives the front steering oil cylinder of a pair of of front-wheel steer and the rear steering oil cylinder of driving a pair of rear wheels steering and passes through the first to the 8th solenoid valve that oil pipe is connect with front steering oil cylinder, rear steering oil cylinder according to control path；Described first to the 8th solenoid valve also passes through oil pipe and connect with oil pump station and connect with angle control ECU, by angle control ECU control conducting and closes, realize in front-wheel position return just, in rear-wheel position time just, four-wheel steering and crab row.The present invention realizes that position is returned just in a key four-wheel, and compared with prior art, structure is simple, reduces the difficulty of driver's operation, extends axle service life, reduces abnormal tyre abrasion.In addition the present invention using nose wheel angle sensor, rear wheel angle sensor detection front-wheel, rear-wheel return positive position and feed back to angle control ECU, wherein position return positive precision reach ± 0.3 °.)

1. positive system is returned in position in a kind of four-wheel drive vehicle four-wheel characterized by comprising drive the forward of a pair of of front-wheel steer The rear steering oil cylinder that is turned to oil cylinder and driving a pair of rear wheels and according to control path by oil pipe and the front steering oil cylinder, The first solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, the 5th solenoid valve, the 6th electricity of rear steering oil cylinder connection Magnet valve, the 7th solenoid valve, the 8th solenoid valve；First solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, Five solenoid valves, the 6th solenoid valve, the 7th solenoid valve, the 8th solenoid valve also pass through oil pipe connect with oil pump station and with an angle control ECU connection processed, by the angle control ECU control conducting and close, realize front-wheel in position return just, in rear-wheel position return just, four-wheel It turns to and crab row.

2. positive system is returned in position in a kind of four-wheel drive vehicle four-wheel as described in claim 1, which is characterized in that the control road Diameter are as follows: the first solenoid valves, the front steering oil cylinder drive a pair of of front-wheel steer；Second solenoid valve is powered, the rear steering Oil cylinder drives a pair of rear wheels to turn to；First solenoid valve and second solenoid valve are powered simultaneously, the front steering oil cylinder driving one A pair of rear wheels crab row is driven to front-wheel and the rear steering oil cylinder；First solenoid valve and third solenoid valve are powered simultaneously, institute Stating front steering oil cylinder drives a pair of of front-wheel and the rear steering oil cylinder to drive a pair of rear wheels while turning to；4th solenoid valve and 5th solenoid valve is powered simultaneously, and the front steering oil cylinder drives in left front circulation；4th solenoid valve and the 6th solenoid valve are same Shi Tong electricity, the front steering oil cylinder drive in off-front wheel time；4th solenoid valve and the 7th solenoid valve are powered simultaneously, after described Steering cylinder drives in left back circulation；4th solenoid valve and the 8th solenoid valve are powered simultaneously, the rear steering oil cylinder driving During off hind wheel returns.

3. positive system is returned in position in a kind of four-wheel drive vehicle four-wheel as claimed in claim 2, which is characterized in that the angle control Position returns positive signal and returns positive switch input by position in a four-wheel in the four-wheel of ECU processed.

4. positive system is returned in position in a kind of four-wheel drive vehicle four-wheel as claimed in claim 3, which is characterized in that first electricity Magnet valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, the 5th solenoid valve, the 6th solenoid valve, the 7th solenoid valve, the 8th electricity The anode of magnet valve is connect with output pin H1, G1, F1, E1, D1, C1, K1, J1 of the control signal of angle control ECU respectively, First solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, the 5th solenoid valve, the 6th solenoid valve, the 7th electricity The cathode ground connection of magnet valve, the 8th solenoid valve；The positive pole of the angle control ECU passes through a pair of of normally open contact of relay ZJ ZJ1-1, protective tube Z-FU1, battery main switch connect the anode of battery, and the cathode of battery and the angle control ECU's Cathode ground connection；The input terminal of ignition switch JK connects the anode of battery by protective tube F-FU2, battery main switch, and igniting is opened The output end for closing JK connects Engine ECU；Line packet one end of relay ZJ is connect with the output end of ignition switch JK, another termination Ground；Position is returned the input terminal just switched and is connect with the output end of the ignition switch JK in four-wheel, and position time is just switching defeated in four-wheel Outlet is returned positive signal input terminal G4 with position in the four-wheel of angle control ECU and is connect；The positive pole of nose wheel angle sensor, The positive pole of rear wheel angle sensor is connect with the output end of ignition switch JK, the positive pole of nose wheel angle sensor, after Take turns the power cathode ground connection of angular transducer；The input terminal of four position conversion switch K2 is connect with the output end of ignition switch JK,；Four Four output ends of position conversion switch K2 control front-wheel steer signal input part B3, the rear-axle steering of ECU with the angle respectively Signal input part K2, four-wheel steering signal input part J2, crab row signal input part H2 connection.

5. positive system is returned in position in a kind of four-wheel drive vehicle four-wheel as claimed in claim 4, which is characterized in that further include one time Positive indicator light, the termination angle control ECU's for returning positive indicator light returns positive signal output end, returns positive indicator light Another termination power ACC.

Technical field

The present invention relates to engineering truck technical field, in particular to positive system is returned in position in a kind of four-wheel drive vehicle four-wheel.

Background technique

The Intelligent System of Vehicle of automation control advantageously reduces labor intensity, improves the safe condition of driver.Work at present The Intelligent electronic control system of all-hydraulic four-wheel drive four-wheel steering of the journey vehicle hydraulic four-wheel driving type based on CAN communication, by starting The composition such as machine, thermoacoustic prime engine device, driving states parameter acquisition unit, steering angle sensor, angle controller ECU and harness, angle Degree controller control ECU carries out data transmission and handles to driving states parameter acquisition.

Engineering truck is made of driving system, steering system, hydraulic system, electric-control system and vehicle frame.Driving system is by moving The composition such as force mechanisms, traveling mechanism, speed reducer.

Hydraulic steering system is mainly made of Liang Tao steering mechanism and fluid-link steering oil cylinder, connected pipes etc., fluid-link steering Oil cylinder both ends connecting rocker arm can push wheel around the vertical axial-rotation of knuckle, thus realize four kinds of modes turn to (front-wheel, after Wheel, four-wheel, crab row).

Steering pattern is realized in engineering truck at present, is to control corresponding hydraulic buttery valve using diode power-up magnetic switch Work drives corresponding hydraulic cylinder to realize and turns to, needs to increase many electronic components, structure is complicated.

In addition at present after four kinds of modes turn to (front-wheel, rear-wheel, four-wheel, crab row) process, middle position, which is returned, every time just all compares Trouble needs two people that position in ability is cooperated to return just in place, and the positive precision in middle position time is also not fully up to expectations, needs pilot control direction Disk, support staff remind driver turn steering wheel according to four-wheel state, generally require repeatedly to rotate position in ability and return just in place, Middle position returns positive front and back wheel precision and also has deviation, and needing to carry out front and back wheel DATA REASONING just can guarantee that positive status, essence are returned in middle position Degree.Comparatively laborious in actual mechanical process, positive accuracy error is returned in middle position can seriously affect vehicle driving safety, to the axle service life and Tire effect is larger.

Summary of the invention

Technical problem to be solved by the present invention lies in turn to for existing engineering truck in four kinds of modes (front-wheel, rear-wheel, Four-wheel, crab row) after process, every time in position return just all more troublesome problem and provide a kind of structure is simple and convenient to operate four Positive system is returned in position in wd vehicle four-wheel.

The technical problems to be solved by the invention can be achieved through the following technical solutions:

Positive system is returned in position in a kind of four-wheel drive vehicle four-wheel, comprising: drive a pair of of front-wheel steer front steering oil cylinder and It drives the rear steering oil cylinder of a pair of rear wheels steering and passes through oil pipe and the front steering oil cylinder, rear steering oil according to control path The first solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, the 5th solenoid valve, the 6th solenoid valve, the of cylinder connection Seven solenoid valves, the 8th solenoid valve；First solenoid valve, second solenoid valve, third solenoid valve, the 4th solenoid valve, the 5th electromagnetism Valve, the 6th solenoid valve, the 7th solenoid valve, the 8th solenoid valve also pass through oil pipe and connect with oil pump station and control ECU with an angle Connection, by the angle control ECU control conducting and close, realize front-wheel in position return just, in rear-wheel position return just, four-wheel steering and Crab row.

In a preferred embodiment of the invention, the control path are as follows: the first solenoid valves, the front steering oil Cylinder drives a pair of of front-wheel steer；Second solenoid valve is powered, and the rear steering oil cylinder drives a pair of rear wheels to turn to；First electromagnetism Valve and second solenoid valve are powered simultaneously, and the front steering oil cylinder drives a pair of of front-wheel and the rear steering oil cylinder to drive a pair of rear wheels Crab row；First solenoid valve and third solenoid valve are powered simultaneously, the front steering oil cylinder drive a pair of of front-wheel and it is described after turn A pair of rear wheels is driven to oil cylinder while being turned to；4th solenoid valve and the 5th solenoid valve are powered simultaneously, the front steering oil cylinder It drives in left front circulation；4th solenoid valve and the 6th solenoid valve are powered simultaneously, and the front steering oil cylinder driving off-front wheel returns In；4th solenoid valve and the 7th solenoid valve are powered simultaneously, and the rear steering oil cylinder drives in left back circulation；4th electricity Magnet valve and the 8th solenoid valve are powered simultaneously, in the rear steering oil cylinder driving off hind wheel time.

In a preferred embodiment of the invention, positive signal is returned by one or four in position in the four-wheel of the angle control ECU Positive switch input is returned in position in wheel.

In a preferred embodiment of the invention, first solenoid valve, second solenoid valve, third solenoid valve, the 4th Solenoid valve, the 5th solenoid valve, the 6th solenoid valve, the 7th solenoid valve, the positive of the 8th solenoid valve control ECU with the angle respectively Control signal output pin H1, G1, F1, E1, D1, C1, K1, J1 connection, first solenoid valve, second solenoid valve, third The cathode ground connection of solenoid valve, the 4th solenoid valve, the 5th solenoid valve, the 6th solenoid valve, the 7th solenoid valve, the 8th solenoid valve；It is described The positive pole that angle controls ECU is connected by a pair of of normally open contact ZJ1-1 of relay ZJ, protective tube Z-FU1, battery main switch Connect the anode of battery, the cathode ground connection of the cathode of battery and angle control ECU；The input terminal of ignition switch JK is logical The anode of protective tube F-FU2, battery main switch connection battery are crossed, the output end of ignition switch JK connects Engine ECU；Relay Line packet one end of device ZJ is connect with the output end of ignition switch JK, other end ground connection；In four-wheel position return the input terminal that is just switching with The output end of the ignition switch JK connects, and position is returned in the four-wheel of the output end just switched and angle control ECU in four-wheel Positive signal input terminal G4 connection is returned in position；The positive pole of nose wheel angle sensor, the positive pole of rear wheel angle sensor and point The output end connection of fiery switch JK, the positive pole of nose wheel angle sensor, the power cathode of rear wheel angle sensor are grounded； The input terminal of four position conversion switch K2 is connect with the output end of ignition switch JK,；Four output ends of four position conversion switch K2 point It is not defeated with front-wheel steer signal input part B3, rear-axle steering signal input part K2, the four-wheel steering signal of angle control ECU Enter to hold J2, crab row signal input part H2 connection.

It in a preferred embodiment of the invention, further include a positive indicator light, described one end for returning positive indicator light Meet the angle control ECU returns positive signal output end, returns another termination power ACC of positive indicator light.

Due to using technical solution as above, the present invention realizes that position is returned just in a key four-wheel, compared with prior art, knot Structure is simple, reduces the difficulty of driver's operation, extends axle service life, reduces abnormal tyre abrasion.In addition this hair It is bright that angle control and is fed back at positive position using nose wheel angle sensor, rear wheel angle sensor detection front-wheel, returning for rear-wheel ECU, wherein the positive precision in position time reaches ± 0.3 °.

Detailed description of the invention

Fig. 1 is the hydraulic principle schematic diagram that positive system is returned in position in four-wheel drive vehicle four-wheel of the present invention.

Fig. 2 is the electric schematic illustration that positive system is returned in position in four-wheel drive vehicle four-wheel of the present invention.

Specific embodiment

The present invention is further described below in conjunction with the drawings and specific embodiments.

Referring to Fig. 1, positive system is returned in position in a kind of four-wheel drive vehicle four-wheel shown in figure, comprising: driving the near front wheel 10, Off-front wheel 10a turn to front steering oil cylinder 20 and driving left rear wheel 30, off hind wheel 30a turn to rear steering oil cylinder 40 and according to Control path passes through the first solenoid valve YV1, the second solenoid valve that oil pipe is connect with front steering oil cylinder 20, rear steering oil cylinder 40 YV2, third solenoid valve YV3, the 4th solenoid valve YV4, the 5th solenoid valve YV5, the 6th solenoid valve YV6, the 7th solenoid valve YV7, Eight solenoid valve YV8；First solenoid valve YV1, second solenoid valve YV2, third solenoid valve YV3, the 4th solenoid valve YV4, the 5th electromagnetism Valve YV5, the 6th solenoid valve YV6, the 7th solenoid valve YV7, the 8th solenoid valve YV8 also pass through oil pipe and connect with oil pump station and with one Angle controls the connection of ECU 50, is controlled the control of ECU 50 conducting by angle and is closed, position in realization the near front wheel 10, off-front wheel 10a Hui Zheng, left rear wheel 30, in off hind wheel 30a position return just, four-wheel steering and crab row.

Referring to fig. 2, the first solenoid valve YV1, second solenoid valve YV2, third solenoid valve YV3, the 4th solenoid valve YV4, the 5th Solenoid valve YV5, the 6th solenoid valve YV6, the 7th solenoid valve YV7, the positive of the 8th solenoid valve YV8 control ECU with angle respectively 50 control signal output pin H1, G1, F1, E1, D1, C1, K1, J1 connection, the first solenoid valve YV1, second solenoid valve YV2, Third solenoid valve YV3, the 4th solenoid valve YV4, the 5th solenoid valve YV5, the 6th solenoid valve YV6, the 7th solenoid valve YV7, the 8th electricity The cathode of magnet valve YV8 is grounded.

Angle control the positive pole of ECU 50 by a pair of of normally open contact ZJ1-1 of relay ZJ, protective tube Z-FU1, Battery main switch connects the anode of battery E, the cathode ground connection of cathode and angle the control ECU 50 of battery E.

The input terminal of ignition switch JK connects the anode of battery E by protective tube F-FU2, battery main switch, and igniting is opened The output end for closing JK connects Engine ECU；Line packet one end of relay ZJ is connect with the output end of ignition switch JK, the other end Ground connection.

The input terminal that positive switch SB1 is returned in position in four-wheel is connect with the output end of ignition switch JK, and positive switch is returned in position in four-wheel The output end of SB1 returns positive signal input terminal G4 with position in the four-wheel of angle control ECU 50 and connect；Nose wheel angle sensor EPS1 Positive pole, rear wheel angle sensor EPS2 positive pole connect with the output end of ignition switch JK, nose wheel angle sensing The positive pole of device EPS1, the power cathode of rear wheel angle sensor EPS2 are grounded；The input terminal and point of four position conversion switch K2 The output end connection of fiery switch JK,；Four output ends of four position conversion switch K2 control the preceding rotation of ECU 50 with angle respectively Connect to signal input part B3, rear-axle steering signal input part K2, four-wheel steering signal input part J2, crab row signal input part H2 It connects.That returns a termination angle control ECU 50 of positive indicator light HL1 returns positive signal output end, returns the other end of positive indicator light HL1 Meet power supply ACC.

When four position conversion switch K2 switch to front-wheel steer position, the first electromagnetism YV1 is powered, and front steering oil cylinder 20 drives The near front wheel 10, off-front wheel 10a are turned to.

When four position conversion switch K2 switch to rear-axle steering position, the second electromagnetism YV2 is powered, and rear steering oil cylinder 40 drives Left rear wheel 30, off hind wheel 30a are turned to.

When four position conversion switch K2 switch to four-wheel steering position, the first solenoid valve YV1 and third solenoid valve YV3 are simultaneously It is powered, front steering oil cylinder 20 drives the near front wheel 10, off-front wheel 10a and rear steering oil cylinder 40 to drive left rear wheel 30, off hind wheel 30a It turns to simultaneously.

When four position conversion switch K2, which switch to crab line position, to be set, the first solenoid valve YV1 and second solenoid valve YV2 lead to simultaneously Electricity, front steering oil cylinder 20 drive the near front wheel 10, off-front wheel 10a and rear steering oil cylinder 40 to drive left rear wheel 30, off hind wheel 30a crab Row.

It is returned just if necessary to middle position, presses position in four-wheel and return positive switch SB1, position is returned just into the angle control input of ECU 50 Signal, first angle control ECU 50 make the 4th solenoid valve YV4 and the 5th solenoid valve YV5 while being powered, and front steering oil cylinder 20 drives During dynamic the near front wheel 10 returns；Then angle control ECU 50 makes the 4th solenoid valve YV4 and the 6th solenoid valve YV6 while being powered, forward It is driven in off-front wheel 10a times to oil cylinder 20, then angle control ECU 50 keeps the 4th solenoid valve YV4 and the 7th solenoid valve YV7 same Shi Tong electricity, rear steering oil cylinder 40 drive during left rear wheel 30 returns, and last angle control ECU 50 makes the electricity of the 4th solenoid valve YV4 and the 8th Magnet valve YV8 is powered simultaneously, and rear steering oil cylinder 40 drives in off hind wheel 30a times.

It presses position in four-wheel and returns positive switch SB1, angle control ECU 50 lights back positive indicator light HL1.Positive mistake is returned in middle position Cheng Zhong, nose wheel angle sensor EPS1, rear wheel angle sensor EPS2 detect the near front wheel 10, off-front wheel 10a, left rear wheel 30, the right side Position signal is simultaneously fed back to angle control ECU 50 by the position of rear-wheel 30a.