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System for increasing exhaust temperature of engine and control method

A control method and engine technology, applied in the direction of engine control, engine components, machines/engines, etc., can solve the problem of low exhaust temperature and achieve the effect of increasing intake air temperature and exhaust temperature

Pending Publication Date: 2022-05-10
DONGFENG COMML VEHICLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is used to increase the exhaust temperature of the engine, especially suitable for solving the problem of low exhaust temperature when the engine is lightly loaded

Method used

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  • System for increasing exhaust temperature of engine and control method
  • System for increasing exhaust temperature of engine and control method
  • System for increasing exhaust temperature of engine and control method

Examples

Experimental program
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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

[0032] Such as Figure 1-2 As shown, a system for increasing the exhaust temperature of the engine in the present invention includes a throttle valve 1, the side wall of the throttle valve 1 is grooved to form a bypass hole 1-4, and the gas flowing through the bypass hole 1-4 passes through the heat exchanger 2 is heated and mixed with the gas in the main intake pipe 10 and enters the intake port of the engine 9 combustion chamber.

[0033] The heat exchanger 2 is connected to the engine coolant, and the intake air is heated by the heat of the engine coolant.

[0034] The throttle valve 1 includes a throttle valve body 1-1, a throttle valve plate 1-2 arranged in the throttle valve body 1-1, and the bypass hole 1-4 is located on t...

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PUM

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Abstract

The invention discloses a system for increasing the exhaust temperature of an engine and a control method. The throttle valve comprises a throttle valve body, the side wall of the throttle valve body is slotted to form a bypass hole, and gas flowing through the bypass hole is heated through a heat exchanger, mixed with gas of a main gas inlet pipe and then enters a gas inlet channel of an engine combustion chamber. The opening degree of the bypass type throttle valve is controlled according to different loads of the engine, the air inlet temperature of the engine is increased in the mode that the heat exchanger heats air inlet, and therefore the exhaust temperature of the engine is increased.

Description

technical field [0001] The invention belongs to the technical field of engine systems, and in particular relates to a system and a control method for increasing engine exhaust temperature. Background technique [0002] With the upgrading of regulations, the emission requirements for engines are getting higher and higher. In the existing technology, most diesel engines adopt the technical route of EGR+DOC+DPF+SCR. For the SCR system, when the exhaust temperature is low, the reaction efficiency of urea and engine exhaust is not high, so increasing the exhaust temperature of the engine under small load can effectively reduce the NO X Rear row, and does not affect engine particulate emissions. [0003] For example, patent CN111720204B discloses an engine control method and its device. The control method includes: obtaining the operating condition parameters and load of the engine; and determining whether the operating state of the engine is in the target operating condition ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D9/08F02M31/04
CPCF02D9/08F02M31/042F02D2009/0222
Inventor 汪雷张少华许振营汪鑫徐一凡
Owner DONGFENG COMML VEHICLE CO LTD