CN201568163U - Intake structure of automobile engine EGR assembly - Google Patents

Abstract

The utility model discloses an automobile engine EGR assembly air inlet structure which solves the problems in existing automobile engines that the integral structure compactness of an engine is worse and connecting pipelines can not be conveniently arranged due to arranging EGR assembles. The automobile engine EGR assembly air inlet structure adopts the technical scheme that one automobile engine EGR assembly air inlet structure is used to communicate an engine cylinder cover exhaust manifold and an EGR assembly, the cylinder cover is provided with a gas inlet side and a gas exhaust side, the exhaust manifold is located on the exhaust side, a water jacket is arranged in the cylinder cover, the automobile engine EGR assembly air inlet structure is characterized by comprising a waste gas passage arranged in the cylinder cover, a gas inlet of the waste gas passage is communicated with the exhaust manifold, and a gas outlet of the waste gas passage is communicated with the EGR assembly.

Description

Intake structure of automobile engine EGR assembly

technical field

The utility model relates to an EGR assembly of an automobile engine, in particular to an intake structure of the EGR assembly.

Background technique

Harmful emissions from engines are a major source of air pollution. With the increasing importance of environmental protection, the goal of reducing harmful emissions from engines has become an important direction for engine development in the world today. With the world's consumption of petroleum products increasing year by year, international oil prices remain high, and the economy of diesel vehicles is becoming more and more prominent, which makes diesel engines occupy an increasingly important position in vehicle power. Exhaust Gas Recirculation (Exhaust Gas Recirculation) is referred to as EGR, which sends a small part of the exhaust gas generated by the diesel engine back to the cylinder. Because there are more inert gases in the recirculated exhaust gas and the temperature is relatively low, this will delay the combustion process, that is to say, the combustion speed will slow down, which will slow down the pressure formation process in the combustion chamber, which is nitrogen oxygen The main reason why the compound will decrease. In addition, increasing the exhaust gas recirculation rate will reduce the total exhaust gas flow (mass flow), so the total pollutant output in the exhaust gas emission will be relatively reduced.

The exhaust gas of the existing EGR assembly is connected to the exhaust manifold of the cylinder head through the connecting pipeline arranged on the outside of the cylinder head, but because there are many pipelines around the engine, this connecting pipeline is inconvenient to arrange Make the whole structure of the engine compact.

Contents of the invention

In order to overcome the above-mentioned defects, the technical problem to be solved by the utility model is to provide an automobile engine EGR assembly air intake structure, which is conducive to reducing the structure of the complete engine and making the overall structure of the engine more compact.

In order to solve the above-mentioned technical problems, the technical solution of the present utility model is: an automobile engine EGR assembly intake structure, which is used to communicate with the engine cylinder head exhaust manifold and the EGR assembly. The cylinder head has an intake side and an exhaust manifold. On the gas side, the exhaust manifold is located on the exhaust side, and the cylinder head is provided with a water jacket, which is characterized in that it includes an exhaust gas passage arranged in the cylinder head, the air inlet of the exhaust gas passage communicates with the exhaust manifold, and the outlet The gas port communicates with the EGR assembly. The exhaust gas channel is formed by the holes machined in the cylinder head. Through the exhaust gas channel, part of the exhaust gas in the exhaust manifold is introduced into the EGR assembly, so that the EGR assembly can be quantitatively oriented through the intake port depending on the working condition of the engine. Exhaust gas is fed into the combustion chamber of the cylinder head.

Preferably, the exhaust gas passage is located on a side of the cylinder head close to the water jacket. The water jacket can provide a certain cooling effect for the exhaust gas passing through the exhaust gas channel, which is beneficial to improve the efficiency of the EGR assembly.

Preferably, the waste gas channel extends along the length direction of the water jacket. In this way, the water jacket can maximize the cooling of the exhaust gas passing through the exhaust gas passage, further improving the efficiency of the EGR assembly.

Preferably, the EGR assembly is arranged on the intake side of the cylinder head, and the exhaust gas passage runs through the intake and exhaust sides of the cylinder head. The EGR is directly installed on the intake side of the cylinder head, and the exhaust gas passage runs through the cylinder head, which makes the exhaust gas passage easier to process and improves the structural compactness of the engine.

Therefore, the beneficial effects of the utility model:

Because the exhaust gas channel arranged in the cylinder head replaces the connecting pipeline arranged outside the cylinder head, the structure of the complete engine is good, and the connection operation of related components is convenient. Moreover, when the exhaust gas passes through the exhaust gas channel, the cooling system in the cylinder head can provide cooling effect for the exhaust gas, and the cooled exhaust gas enters the combustion chamber of the cylinder head through the EGR assembly, which improves the efficiency of the EGR assembly.

Description of drawings

Accompanying drawing 1 is the sectional view that the air intake structure of the EGR assembly of the automobile engine of the present invention is located in the cylinder head.

Detailed ways

See accompanying drawing, the utility model automobile engine EGR assembly intake structure is arranged in cylinder head 2, and described cylinder head 2 has intake side and exhaust side, and described ERG assembly 3 is arranged at cylinder head 2 On the intake side, an exhaust manifold 1 is provided on the exhaust side of the cylinder head 2 . A water jacket 5 is provided in the cylinder head 2, and the fuel injector of the engine passes through the water jacket 5, and the water jacket 5 can cool the fuel injector in operation.

An exhaust gas channel 4 is arranged in the cylinder head 2, and the exhaust gas channel 4 runs through the intake side and the exhaust side of the cylinder head 2, wherein the air inlet of the exhaust gas channel 4 communicates with the exhaust manifold 1, and the gas outlet of the exhaust gas channel 4 communicates with the exhaust manifold 1. The EGR assembly 3 is connected. The exhaust gas passage 4 guides part of the exhaust gas in the exhaust manifold 1 into the EGR assembly 3 .

The exhaust gas channel 4 is located on the side of the cylinder head 2 close to the water jacket 5, and the exhaust gas channel 4 extends along the length of the water jacket 5. The water jacket 5 can fully cool the exhaust gas flowing through the exhaust gas channel 4, and the fully cooled exhaust gas The efficacy of the EGR assembly 3 can be improved by entering the cylinder head combustion chamber through the EGR assembly 3 .

Claims (4)

1. A car engine EGR assembly intake structure, used to communicate with the engine cylinder head exhaust manifold and EGR assembly, the cylinder head has an intake side and an exhaust side, and the exhaust manifold is located on the exhaust side , the cylinder head is provided with a water jacket, which is characterized in that it includes an exhaust gas passage (4) arranged in the cylinder head (2), and the air inlet of the exhaust gas passage (4) communicates with the exhaust manifold (1), The air outlet communicates with the EGR assembly (3). 2 . The air intake structure of the automobile engine EGR assembly according to claim 1 , characterized in that, the exhaust gas channel ( 4 ) is located on a side of the cylinder head ( 2 ) close to the water jacket ( 5 ). 3. The air intake structure of the automobile engine EGR assembly according to claim 2, characterized in that, the exhaust gas channel (4) extends along the length direction of the water jacket (5). 4. according to claim 1,2 or 3 described automobile engine EGR assembly intake structures, it is characterized in that, described EGR assembly (3) is located at the intake side of cylinder head (2), and waste gas channel (4 ) runs through the intake and exhaust sides of the cylinder head (2).

Images