《02Toyota Carryover-Rear load leveling suspension.ppt》由会员分享，可在线阅读，更多相关《02Toyota Carryover-Rear load leveling suspension.ppt（29页珍藏版）》请在三一文库上搜索。
1、Rear Load Leveling Suspension,Overall The Rear load leveling suspension has been used in order to mechanically adjust the rear vehicle height in the shock absorber to the target height,NOTE: Vehicle height cannot be adjusted to a position as desired,Rear Load Leveling Suspension,Construction The loa
2、d leveling function uses the pumping action of the piston rod while the vehicle is in motion,Time,Vehicle Height,Unload,Standard (Target Height),Full Load,Distance for Vehicle Height adjustment,Amount of Vehicle Height Rising,Unload,Loaded,Piston Rod Extended/Contracted,End of Leveling (Vehicle in M
3、otion),End of Leveling (Unloading),NOTE: Self leveling function does not operate when the vehicle is stopped,Rear Load Leveling Suspension,Layout of Components Load leveling suspension is provided for rear suspension,Relief Valve,Piston Rod,Discharge Check Valve,Pump Chamber,Suction Check Valve,Pump
4、 Rod,Low Pressure Chamber,Leveling Port,N2 Gas,N2 Gas,High Pressure Chamber,Rear Load Leveling Suspension,Operation (Piston rod contracted for load),Operation (Piston rod contracted for load) The oil in the pump chamber in the piston rod compresses when the piston rod is contracted,Rear Load Levelin
5、g Suspension,Piston Rod,Pump Chamber,Load,Piston Rod Contracted,Operation (Piston rod contracted for load) The internal pressure of the pump chamber becomes higher than the internal pressure of the high pressure chamber.,Rear Load Leveling Suspension,Discharge Check Valve,High Pressure Chamber,Opera
6、tion (Piston rod contracted for load) As a result, this pressure opens the discharge check valve, allowing the oil in the pump chamber to flow through the oil passage in the piston rod, and enter the high pressure chamber,Rear Load Leveling Suspension,Discharge Check Valve,High Pressure Chamber,Rear
7、 Load Leveling Suspension,Operation (Piston rod contracted for load),Rear Load Leveling Suspension,Operation (Piston rod extended/contracted),Operation (Piston rod extended/contracted) The oil in the pump chamber in the piston rod increases when the piston rod is extended,Rear Load Leveling Suspensi
8、on,Piston Rod,Pump Chamber,Piston Rod Extended,Operation (Piston rod extended/contracted) The internal pressure of the pump chamber becomes lower than the internal pressure of the low pressure chamber.,Rear Load Leveling Suspension,Low Pressure Chamber,Suction Check Valve,Operation (Piston rod exten
9、ded/contracted) As a result, this pressure opens the suction check valve, allowing the oil in the low pressure chamber to flow through the oil passage in the pump rod, and enter the pump chamber,Rear Load Leveling Suspension,Low Pressure Chamber,Suction Check Valve,Pump Rod,Operation (Piston rod ext
10、ended/contracted) The oil in the pump chamber in the piston rod compresses when the piston rod is contracted,Rear Load Leveling Suspension,Piston Rod,Pump Chamber,Piston Rod Contracted,Increase in internal pressure of the pump chamber,Operation (Piston rod extended/contracted) The internal pressure
11、of the pump chamber opens the discharge check valve, allowing the oil in the pump chamber to flow through the oil passage in the piston rod, and enter the high pressure chamber,Rear Load Leveling Suspension,Discharge Check Valve,High Pressure Chamber,Operation (Piston rod extended/contracted) The oi
12、l that is sent to the high pressure chamber compression the N2 gas via diaphragm. At the same time, a force to push it back (Reaction force) is generated in the high pressure chamber,Rear Load Leveling Suspension,N2 Gas,Diaphragm,Reaction Force,Operation (Piston rod extended/contracted) Reaction for
13、ce acts on the piston via the oil, to push the piston and piton rod position upward,Rear Load Leveling Suspension,Reaction Force,Piston Rod Extended/Contracted,Vehicle height is returned to a standard position by repeating this action,Amount of Piston Upward,Rear Load Leveling Suspension,Operation (
14、Piston rod extended/contracted),Time,Vehicle Height,Unload,Standard,Full Load,Unload,Loaded,Piston Rod Extended/Contracted,End of Leveling (Vehicle in Motion),End of Leveling (Unloading),Rear Load Leveling Suspension,Operation (End of leveling Vehicle in motion),Operation (End of leveling Vehicle in
15、 motion) The lower end of the pump cylinder reaches the cutout in the pump rod, thus forming a bypass between the pump chamber and high pressure chamber,Rear Load Leveling Suspension,Cutout Portion,Bypass to Pump Chamber,Operation (End of leveling Vehicle in motion) The oil that is sent from the hig
16、h pressure chamber to pump chamber through the bypass,Rear Load Leveling Suspension,Pump Chamber,Bypass,Operation (End of leveling Vehicle in motion) The pump chamber pressure and the high pressure chamber pressure become equal,Rear Load Leveling Suspension,Piston Rod Extended,Piston Rod Contraction
17、,Preventing the vehicle height from increasing further,Rear Load Leveling Suspension,Operation (End of leveling Vehicle in motion),Time,Vehicle Height,Unload,Standard,Full Load,Unload,Loaded,Piston Rod Extended/Contracted,End of Leveling (Vehicle in Motion),End of Leveling (Unloading),Rear Load Leve
18、ling Suspension,Operation (End of leveling Unloading),Operation (End of leveling Unloading) After the unloading is completed, the piston rod initially moves up in an attempt to raise the vehicle height,Rear Load Leveling Suspension,Unloading,Operation (End of leveling Unloading) Upward movement of t
19、he piston rod causes the leveling port in the pump rod to connect to the high pressure chamber,Rear Load Leveling Suspension,Unloading,Leveling Portion,To Low Pressure Chamber,Operation (End of leveling Unloading) When the piston rod moves downward along with the lowering of the vehicle height, thus
20、 closing the leveling port,Rear Load Leveling Suspension,Rear Load Leveling Suspension,Operation (End of leveling Unloading),Rear Load Leveling Suspension,Relief Valve During vehicle height adjustment, this valve prevents the internal pressure in the high pressure chamber from rising abnormally,Rear Load Leveling Suspension,Service Point Disposal Using a drill, make a hole near the marks of welding of a cylinder When make a hole, open high pressure side first,Marks of Welding,High Pressure Side,Low Pressure Side,