Engineering vehicle cooling system with exhaust injection cooling device

Abstract

The invention discloses an engineering vehicle cooling system with an exhaust injection cooling device, comprising a main cooling system and an auxiliary cooling system, wherein the main cooling system comprises a fan driven by an engine or a hydraulic motor and at least one or a combination of several modules of a water radiator, a hydraulic oil radiator, a transmission oil radiator and an air-air intercooler which are high in heat dissipation power; and the auxiliary cooling system comprises an exhaust injection system, an electronic fan and at least one or a combination of several modules of an air conditioner condenser, a fuel oil cooler and the like which are small in heat dissipation power. Air drive force needed by heat dissipation of the auxiliary cooling system is mainly providedby the exhaust injection system, so that the electronic fan can operate only when the drive force is insufficient, the drive force is compensated, and drive force is guaranteed to be continuous and sufficient. The engineering vehicle cooling system can meet heat dissipation requirement of a cooling system, also can save power consumption of the fan, and reduces noises.

Description

Technical field[0001]The invention belongs to the technical field of engineering machinery, and in particular relates to an engineering vehicle cooling system with an exhaust ejection cooling device.Background technique[0002]As an important equipment for engineering construction, construction machinery has large power, large torque, complex and harsh working conditions, many heating components during work, and large heat dissipation requirements. Its heat source includes not only engine water jackets, but also hydraulic actuators, Transmission systems, turbocharging systems, air conditioning systems, fuel cooling systems, etc. require more heat to be taken away by the cooling medium. Construction machinery travels slowly, and there is almost no oncoming wind. It is necessary to use a fan to force suction or blow to cool the system.[0003]In the prior art, there are mainly two ways to arrange the cooling system of the whole vehicle. One is the traditional fan radiator structure, in wh...

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Problems solved by technology

[0004] Both methods of vehicle cooling system layout in the prior art have defects. The first method has two defects: on the one hand, for radiator single-row parallel arrangement, it often requires a large layout space and can only be used Because there are fewer cooling modules in the whole vehicle (some models may only have one or a combination of water radiator, hydraulic oil radiator, transmission oil radiator, air-to-air cooler, air-conditioning condenser and fuel cooler), and The space in the power cabin is sufficient; on the other hand, for the arrangement of multiple rows of radiators in series, some models contain more cooling modules, and the space in the power cabin is limited, so multiple rows in series can only be used. In this way, the resistance of the cooling system is too large, and only Increase the static pressure of the fan, and must meet the air volume requirements, which leads to excessive fan power consumption, some even exceed 10% of the engine output power, which greatly reduces the engine's working performance, and also causes excessive fan noise, which affects the vehicle noise index , and sometimes even cause the cooling system to fail to match

The defect of the second method is that it does not use the fan structure and only relies on the negative pressure generated by the engine exhaust injection as the air driving force for the radiator module combination. Due to the limited negative pressure generated by the exhaust injection, it varies with the engine speed. However, it is very unstable due to changes, and the wind resistance of the radiator module combination is very large, resulting in a small air volume passing through the radiator module, resulting in poor heat dissipation capacity of the cooling system, which cannot meet the actual heat dissipation requirements.

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