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　　Http://club.autohome.com.cn/bbs/thread-c-874-7520574-1.html

　　Http://hi.baidu.com/khadgar_959/blog/item/834c85ef20a661e2ce1b3eaf.html

　　Net friend.Khadgar_959, the home of cars Tiguan Forum)When the contrast model specially pay attention to what the Tiguan (Tiguan) out of the engine compartment, out door events on the way to view interest, specially look. The picture is the Tiguan (Tiguan ) 1.8TSI configuration engine compartment.

This is not to look not to know a look startled...... The absolute is a great safety hidden trouble, as a front cabin layout engineer (though not Senior), absolute to way, and always remind ourselves, is at the front of the bomb in the vehicle safe area, must be circumspect, can't make fun of the life......

The following chart, fuel pipe from the right side of body around to the front of engine, oil pipe in the engine cover below through the high pressure pump, fuel rail, injector, sprayed into the cylinder from the cylinder head.

　　The study found that, here is the Tiguan steam to the manifold valve.

In this way, the main reason lies in the high-pressure pump oil, the fuel pressure is very large, can reach about 10MPa as the injection pressure and. The water tank is arranged at the beam is the airbag sensor, related to the collision there must be broken and triggering of airbag. So,The water tank crossbeam collapse pressure burst back oil pipeline oil circulation, high pressure oil spray into the air, collision friction sparks ignited the explosion. The rear supply line is easy to damage the rubber hose, fuel, a direct result of vehicle combustion. 

A few examples:

1, the public their Skoda 1.6L EFI, yellow circle is oil

2, this does not say which brand, pay attention to the yellow circle supply position, distance can be very far place is met

The small car 3, a foreign 1.2L, the same yellow circle supply distance collision danger zone, and the engine itself in front of a period of non collapsible hard area

4, the figure is a domestic car, is one of the large number of domestic car use Dongan Mitsubishi engine case, the same yellow circle supply part relatively safe

5, the domestic Q5 is not such an arrangement, Audi basically is the longitudinal mounted engine, fuel supply pipe from the floor along the longitudinal internal firewall directly from the engine before entering a high pressure oil pump and the fuel rail

6, another Q5 front cabin layout

From the back into the fuel rail, the risk is small. But this is the case if the engine and the Tiguan same, turbine in front, but not in front of what fuel is not what problem, many car exhaust pipe are arranged in the rear water tank fan.

7, the high pressure oil on imported Tiguan rail

　　Some Japanese car carrier said: also below the turbine oil! Once the pipe burst, will burn!Khadgar_959's answerIs:The turbine is not just below the oil pipe, and pipe through a turbine place is hard tube, pipe and hose joint protection is also good, the possibility of relatively small on the turbine ignited. But the tubing go from here, and hose abruptly so by absolute will be out of the question. In fact, oil inlet pipe protection can also be little risk, return pipe can be completely from the engine back around, no need to go in front of such a dangerous place, this valve is recommended for a place.

　　The netizen said:Such a simple truth, in 1937 began to do vehicle mass, no reason not to understand? All know that gas bottles to be away from the fire.

　　Khadgar_959's answerIs:

This problem is rooted in the intake manifold is arranged at the front side. Because the oil return line is to take the side of the. Volkswagen rear engine in 1937 has been not exist such problems, after several generations of vehicle longitudinal, transverse engine exhaust engine does not exist the problem in layout before. But not necessarily in 1937 people understand the problem now will understand.

But not the intake pipe layout at the front side of the engine, oil return pipe must go, there are still many can avoid such problems, although cannot guarantee will not bring other problems.

Another is in fact the front collision with the possibility of a fire is not particularly large, the place from the tank this low close to the heat source, principle of exhaust pipe may be considered factors of mass engineer.

There is, direct injection is the only recently emerging technology, return oil pressure often has reached a very high level of. The oil back to the past even leak, because the pressure is not high, missed a little pressure will decrease rapidly, will not cause great harm. This thing is the experience and lessons.