Air inlet manifold and automobile engine

Abstract

The invention provides an air inlet manifold and an automobile engine comprising the air inlet manifold. The air inlet manifold comprises a pressure stabilizing cavity and at least two air channels which are communicated with the pressure stabilizing cavity, wherein the pressure stabilizing cavity is provided with an air inlet connected with a throttle valve; the joints of the air channels and the pressure stabilizing cavity have unequal filleted structures by which air is uniformly distributed into each air channel after passing through the air inlet and being subjected to pressure stabilization in the pressure stabilizing cavity. Preferably, at the joints of the air channels and the pressure stabilizing cavity, the fillet of a single air channel vertical to the air inlet direction is greater than a fillet in the air inlet direction; at the joints of the air channels and the pressure-stabilizing cavity, the fillet of a first air channel in the air inlet direction is greater than the fillet of a tail air channel, and the fillet of a middle air channel is smaller than the fillets of the first air channel and the tail air channel. By adopting the structure, the air inlet pressure loss can be reduced effectively, the difference among the pressure loss of each air channel is lowered, the air inflow of each cylinder kept uniform while the air inflow of each cylinder is increased, and the power performance and economical efficiency of the engine are improved and increased.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to an intake manifold and an automobile engine including the intake manifold. Background technique [0002] The airway structure of the intake manifold is one of the main factors affecting the intake air volume and uniformity of the engine. The maximum air intake of each cylinder of the engine is the premise to ensure the realization of the highest power of the engine; and the uniformity of the intake air of each cylinder directly affects the uniformity of the working ability of each cylinder of the engine. Poor uniformity will result in unstable torque output and large engine vibration. The problem is that at the same time, in order to limit the large knocking phenomenon of individual cylinders, the ignition advance angle of the engine will be reduced as a whole, and the overall output capacity of the engine will be reduced. Therefore, a reasonable design of the airway ...

AI Technical Summary

Problems solved by technology

[0003] like figure 1 Shown is a schematic diagram of the structure of an intake manifold in the prior art. The air passage structure of the intake manifold is unreasonably designed, and the cross-sectional structure of the equal pressure chamber is used, which is not conducive to reducing the intake pressure loss; The structure is not conducive to avoiding the characteristics of uneven pressure loss of each cylinder due to the disadvantages of the airway space structure, that is, the uniformity of the pressure loss of each airway is poor, thus affecting the uniformity of the intake air volume of each cylinder of the engine

Therefore, unreasonable airway structure design will increase the intake pressure loss and reduce the uniformity of pressure loss, affect the maximum power and maximum torque of the engine, and the uniformity of the work of each cylinder, and ultimately affect the performance of the engine

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