Bold idea, modify the EGR pipe

我刚清洁了进气歧管，发现 EGR 管很细，油污很容易堆积和堵塞。
在第一个圆柱体的位置，堆积更为严重。
我本来想加一个集油罐，但突然想到把这两根管子换掉，细细的EGR管就不再堵塞了。
与较窄的 EGR 管相比，进气歧管内的空气混合也更加平衡。
不知道原来的管子是真空管还是PVC管。欢迎讨论和指导

 

It's easy to cut the stainless steel pipe, use a rubber hose to connect to the large pipe near the throttle, and add an oil collection tank in the middle.

 

Background technology:
2. Most of the intake manifold assemblies currently on the market place the egr interface in the manifold pressure stabilizing chamber. On the one hand, the EGR interface at the pressure stabilizing chamber position is not conducive to ensuring the uniformity of EGR exhaust gas distribution. On the other hand, due to the limited layout space, the EGR exhaust gas intake position is close to the intake air and pressure sensor, which makes it prone to icing failure. In addition, most intake manifolds are designed with only one pressure stabilizing chamber, the gas flow is not stable enough, and the manifold surface stiffness is low, which will cause intake noise.
Technical implementation elements:
3. In order to solve the problems existing in the above background technology, the present invention further provides a dual-pressure chamber intake manifold assembly that evenly distributes EGR exhaust gas, which can evenly distribute EGR exhaust gas, reduce intake noise, improve NVH performance, meet National VI emission requirements and improve intake performance.
4. The technical solution adopted by the present invention is: a dual-pressure stabilization chamber intake manifold assembly for uniformly distributing EGR exhaust gas, including an inlet flange, an outlet flange, a pressure stabilization chamber, an intake duct, an EGR exhaust gas channel and an EGR flange; the inlet flange is located at the rear end of the pressure stabilization chamber, the four intake ducts are located at the front side of the pressure stabilization chamber, the outlet flange is located at the front side of the four intake ducts, the EGR exhaust gas channel is integrated at the trough of the four intake ducts, the EGR flange is arranged on the left side of the EGR exhaust gas channel, and an exhaust gas hole is arranged on each intake duct, and the EGR exhaust gas channel is connected to the four intake ducts through the four exhaust gas holes.
5. Compared with the prior art, the present invention has the following beneficial effects:
6.1. The present invention arranges the EGR interface at the trough of the intake duct, which can evenly distribute the EGR exhaust gas, reduce the surface radiation noise of the manifold, improve the NVH performance, and has a compact structure and can improve the intake performance.
7.2. The present invention integrates an EGR exhaust gas channel on the intake manifold airway. The EGR exhaust gas enters the channel through the EGR flange, then enters the four intake channels through an equidistant path, and enters the cylinder head to participate in combustion, which greatly improves the uniformity of exhaust gas distribution.
8.3. The intake manifold of the present invention is designed as a dual-cavity structure. In addition to the pressure stabilizing cavity, a resonant cavity is added, which plays a role in stabilizing flow on the one hand, and increases the surface stiffness of the manifold on the other hand, which can reduce surface radiation noise, improve NVH performance, meet the National VI emission requirements and improve intake performance.
Illustrations

 

I searched for a patent that talks about improving ERG gas unevenness.
I'm in California, so the chances of freezing are slim.
Toyota's engine still heats up very quickly.
I think it's worth a try.
What do you think?

 

According to the patent idea, cutting the ERG stainless steel pipe and adding an oil collecting tank as a resonance chamber can also reduce a lot of oil accumulation.
It is more appropriate to add a similar oil collecting tank or particle trap in the exhaust pipe to reduce the clogging pressure of the EGR cooler, but the exhaust is a high-temperature pipe, which is more difficult to do.
The exhaust gas recovery pipe of the fourth-generation engine is after the catalytic converter, so there is almost no EGR problem.

 

The main operating point of the hybrid engine is also at the engine's intermediate load, and it is extremely important to improve the combustion rate at the intermediate load. Atkinson engines can use cooling EGR technology to improve fuel consumption at intermediate engine loads. The Atkinson engine can use cooling EGR technology to improve the fuel consumption rate at the intermediate load of the engine. The existing gasoline engine adopts an EGR circulation system, which takes exhaust gas from the exhaust manifold, and then merges it into the intake manifold inlet through the EGR pipeline, and distributes EGR exhaust gas through the intake manifold pressure stabilizing chamber. This intake manifold is only designed with an interface connected to the EGR pipeline at the inlet, and there is no independent EGR exhaust gas distribution pipe, as shown in Figure 6. Since fresh air and exhaust gas are distributed through the intake manifold pressure stabilizing chamber at the same time, the lengths of the intake manifold branches are inconsistent, and the airflow fluctuations in the intake manifold pressure stabilizing chamber interfere with the intake between the adjacent two cylinders, resulting in inconsistent EGR rates of each cylinder of the engine, uneven exhaust gas distribution of each cylinder, and ultimately inconsistent cylinder pressure and combustion of each cylinder, affecting power and emissions.

The purpose of the utility model is to provide an intake manifold with an integrated EGR distribution pipe for an Atkinson cycle gasoline engine in view of the defects of the above-mentioned prior art. The EGR exhaust gas distribution pipe is integrated on an ordinary intake manifold. The distribution pipe has a certain volume to ensure that the pressure fluctuation in the cavity is small. The distribution pipe is connected to each intake branch pipe by respective channels and is close to the cylinder, thereby avoiding the influence of the intake manifold branch pipe, realizing the effective separation of the EGR exhaust gas flow channel and the fresh air intake channel, and well ensuring the uniformity of EGR exhaust gas distribution.

 

I found another patent. It seems that what I thought was simple. If EGR is directly injected into the intake manifold, the EGR gas obtained by each cylinder will be uneven.
But I still hope to add an oil collecting tank to the EGR stainless steel pipe, and it is still a separate pipe.