carLittle knowledge, the more you know, the safer you know, the more you know, the more professional you know, the more you know the more you get started, do you think so?
It's circulated on the Internet, uh... it is also circulated on the Internet: "The hydraulic pump will be damaged if it is killed for a long time", is it true?
First look at the picture above. Baidu came out with a lot of results all at once, telling you not to kill you.Their reason is to help after killing the directionpistonCan't move anymore, the hydraulic pump will keep holding back until it suffocates one day.
Is it true? I won't sell it anymore, just tell everyone: there is nothing wrong at all! ! !
Next, let’s talk about why it’s okay. Look at the picture first:
Normal driving
Let me talk about it first, helpsteering systemMainly bysteering wheel, Hydraulic valve on the steering wheel, hydraulic pu
carLittle knowledge, the more you know, the safer you know, the more you know, the more professional you know, the more you know the more you get started, do you think so?
It's circulated on the Internet, uh... it is also circulated on the Internet: "The hydraulic pump will be damaged if it is killed for a long time", is it true?
First look at the picture above. Baidu came out with a lot of results all at once, telling you not to kill you.Their reason is to help after killing the directionpistonCan't move anymore, the hydraulic pump will keep holding back until it suffocates one day.
Is it true? I won't sell it anymore, just tell everyone: there is nothing wrong at all! ! !
Next, let’s talk about why it’s okay. Look at the picture first:
Normal driving
Let me talk about it first, helpsteering systemMainly bysteering wheel, Hydraulic valve on the steering wheel, hydraulic pump, driving piston cylinder, etc. The hydraulic pump is driven by the engine to provide boost pressure. The hydraulic valve mainly controls the flow direction of hydraulic oil. The figure shows the rotary valve assist. When the steering wheel is turned, the hydraulic valve will make a series of reversing actions according to the rotation angle of the steering wheel to control the flow of hydraulic oil.
The figure shows that when driving in a straight line, each inlet of the reversing valve is open at this time, and the hydraulic oil acts on both sides of the piston. At this time, because the pressure on both sides is equal, there will be no pressure difference, and the piston will not move. straight. The high-pressure hydraulic oil generated by the oil pump flows back to the hydraulic pump through the bypass circuit. Keep looping. At this time, the hydraulic pump is working normally.
Turn
As shown in the picture above, now you start to turn right (the picture is the left side, but we are talking about the image). When the steering wheel is turned, the hydraulic valve closes the bypass circuit and the inlet of the left piston. At this time, the hydraulic oil pumped by the oil pump flows to the right cylinder, pushing the piston to the left cylinder, producing a boosting effect. At this time, the hydraulic pump is used to push the piston to move, and the hydraulic pump works normally.
Kill direction
The next step is the key point. Look at the direction of killing, as shown in the picture above. The state of the hydraulic valve at this time is equivalent to the state when driving straight.Although the piston cannot move, the hydraulic pressureBooster pumpThe generated energy is returned to the oil pump through the bypass pipeline, which is equivalent to continuous circulation. Therefore, it can be seen that there is no "holding" phenomenon in the hydraulic pump when the direction is killed.
Rotary valve
The picture above is the physical picture of the rotary valve. The real object is much more complicated than the simulated diagram, which also explains why the mechanical hydraulic assist structure is complicated and the maintenance difficult. Just these few valves and oil ports are enough to ponder.
In fact, if you say that the direction of death is harmful, it will have a certain bad effect on the suspension system, because the suspension system of the steering wheel is very complicated, and the steering wheel of the front-wheel drive model is also connected to the transmission.Half shaft, So when the direction is killed, the front suspensionBalance bar, Shock absorbers, steering ball joints, half shafts and other components are almost in the limit state, but the normal driving time is very short, so you don't need to care at all.
Author's point of view:
1. Killing the direction will not damage the booster pump.
2. Go back to the right direction when parking.
The power steering must not be killed, and the power steering pump must be burned if killed for a long time. This is common sense. The abnormal sound of the booster pump reminds you to go back a little.
