How to solve the problem of carbon deposition in intake valve of in-cylinder direct injection engine

Carbon deposition in micro intake valve and its solution: common problems of direct injection engine? My old car was an engine of Ming Rui 1.8tsi.

It's the same direct injection engine as the mini engine. When I went for major maintenance yesterday, because the acceleration of the old car was not as smooth as that of the new car, the idle speed often reciprocated at 600-800 rpm, and the fuel consumption at idle speed was higher than that of the new car, and sometimes,

I will also crash the car, so I will do a thorough cleaning. I removed the whole air intake system and cleaned the fuel injectors below. After dismantling, I was surprised to see the air inlet of the engine. I thought that the carbon deposit at the air inlet of my car would not be particularly serious. Unexpectedly, this thorough cleaning made me realize that carbon deposition in the intake system is inevitable. All the cars I used to buy were synthetic engine oil, and many brands were changed in the middle. At first, it was gray shell, and later it was Jin Mobil. Now it has been used by Castrol. Finally, I understand that synthetic engine oil has little influence on the intake system and fuel system of the in-cylinder direct injection machine. Post some photos of the public forum. Yesterday, the weather here was bad and the temperature plummeted, so I didn't take pictures.

Mine is similar to this rider's, except for most of my intake valves.

It is not surprising to watch the master dismantle the whole intake system and the position of the direct injection nozzle in the cylinder. In addition to the dust jacket, the air intake system also has a positive crankcase ventilation connection. The crankcase is forced to ventilate by the vacuum suction of the intake pipe, that is, the partially unburned gas leaked by the high-temperature evaporation of engine oil in the crankcase is sucked out, and these mixed gases are sent to the intake system for re-combustion. Oil vapor is viscous and then adheres to the intake pipe and intake valve.

A lot of so-called carbon deposits have been formed for a long time, which is also very common abroad and is the short board of direct injection engines.

Bmw4s usually suggests cleaning the air intake system every maintenance, and then hanging the bottle, which is expensive, but it is also necessary for direct injection engines.

. Yesterday, Google searched the principle of oil respirator and found many merchants on Taobao.

It is found that the oil aeration pot of Taobao mini is extremely expensive, basically more than 3000 yuan.

A cheap oil respirator is basically a jar. I don't know if the internal structure of more than 3000 dedicated mini is better than the appearance, but unfortunately I can't find a description of the internal structure. A good oil absorber has a built-in filtration system, which can separate most oil and gas from combustible gas. The oil absorber sold by google in the United States was found to be much more affordable than Tao * Bao, and there was a filtering system in it, not a simple metal jar. Prepare Haitao. This is a very good oil respirator in brand 42, and the price is almost more than 200 yuan compared with other modification factories. Including freight, it should not exceed 300 yuan, which is much cheaper than Taobao. The price of oil absorber of Taobao brand is one grade lower than this price.

Not very cost-effective. If everyone can buy a group, it would be perfect if a moderator presided over the group purchase. The price in everyone's hand can be cheaper, at least the freight can be reduced a lot.