Engine assembly and vehicle with same
A technology of engines and components, applied in the direction of engine control, combustion engines, machines/engines, etc., can solve the problems of low combustion efficiency in cold start conditions, poor switching smoothness, and affecting torque output, etc., to achieve low design and production costs, The effect of high output torque and low pumping loss
Active Publication Date: 2017-12-05
GREAT WALL MOTOR CO LTD
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Problems solved by technology
[0004] However, in the normal operating mode of the Atkinson cycle engine in the related art, the supercharger cannot intervene and affect the torque output. The smoothness of switching between cycles is poor, and the combustion efficiency of the engine in the cold start condition is low when the engine is in the Atkinson cycle mode
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[0031] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0033] First, an engine assembly 100 according to an embodiment of the present invention will be described with reference to the drawings. Such as Figure 1-Figure 4 As shown, the engine assembly 100 includes a turbocharger 1 , an engine 2 , a first on-off valve 41 and a second on-off valve 42 .
[0034] The turbocharger 1 has a compressor 11, the compressor 11 is used to supply compressed air to the engine 2, the cylinder 20 of the engine 2 has a combustion chamber, and the combustion chamber is correspondingly provided with a first intake valve 21 and a second intake valve 22 , the first on-off valve 41 is disposed between the outlet end of the compressor 11 and the second intake val...
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The invention provides an engine assembly and a vehicle with the same. The engine assembly comprises a turbosupercharger, an engine, a first on-off valve and a second on-off valve, wherein a combustion chamber of a cylinder of the engine is correspondingly provided with a first inlet valve and a second inlet valve; the first on-off valve is arranged between the air outlet end of a compressor and the second inlet valve; the second on-off valve is arranged between the second inlet valve and the air inlet end of the compressor; when the engine is in a first work mode, the first on-off valve is in a closed state, the second on-off valve is selectively in an opened or closed state, and the second inlet valve is opened at the last stage of the intake stroke; and when the engine is in a second work mode, the first on-off valve is in an opened state, the second on-off valve is in a closed state, and the first inlet valve and the second inlet valve are synchronously linked at the intake stroke. The engine assembly can be smoothly switched between the Atkinson cycle and the Otto cycle, pump gas loss is low, the fuel economy is good, and output torque is high.
Description
technical field [0001] The invention relates to the technical field of vehicle manufacturing, in particular to an engine assembly and a vehicle with the engine assembly. Background technique [0002] The development of the engine is affected by knocking, so a moderate compression ratio (especially a supercharged gasoline engine) has to be selected, so that the ideal thermal efficiency is very low. If other energy losses are considered, the thermal efficiency will be even lower (the current level is more than 30%). The pumping loss of the engine under low load conditions is the key energy loss. [0003] In order to improve the thermal efficiency of the engine and reduce the pumping loss, the Atkinson cycle technology is gradually introduced into the related technologies. The Atkinson cycle technology can increase the expansion ratio and improve the theoretical thermal efficiency. Most of the related technologies control the closing time of the intake valve to adjust the intak...
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IPC IPC(8): F02D9/02F01L1/08
CPCF01L1/08F02D9/02Y02T10/12
Inventor 王江涛李宇飞杨晓勇高峰胡广进申荣伟鲍春来张士伟
Owner GREAT WALL MOTOR CO LTD