Engine cooling system

Abstract

The invention relates to the technical field of engines and discloses an engine cooling system. The engine cooling system is characterized in that a water outlet of a cylinder cover is connected with a first pipeline, the tail end of the first pipeline is communicated with a second pipeline and a third pipeline which are connected in parallel, an EGR (exhaust gas recirculation) cooler and a heater which are connected in series are arranged on the second pipeline, and the tail end of the third pipeline is communicated with a fourth pipeline; the tail ends of the second pipeline and the fourth pipeline are both connected with an inlet of a thermostat, and a water pump is connected between an outlet of the thermostat and a water inlet of a cylinder; the tail end of the third pipeline is further communicated with a fifth pipeline connected with the fourth pipeline in parallel, the tail end of the fifth pipeline is connected with an inlet of a radiator, and an outlet of the radiator is communicated with an inlet of the thermostat. The engine cooling system facilitates increase of waste heat energy utilization rate of an engine, facilitates rapid engine heating, and facilitates later rectification matching.

Description

Technical field [0001] The invention relates to the technical field of engines, in particular to an engine cooling system. Background technique [0002] The cooling system in the traditional diesel engine such as figure 1 As shown, the thermostat 1'is arranged at the water outlet end of the engine. When the thermostat 1'is closed, the engine is in a small cycle state. At this time, the engine water is divided into three ways, one of which is the water outlet circuit of the cylinder block 2'. This circuit flows through the oil cooler 3'and the EGR cooler 4'and then returns to the engine through the water pump 5'; in the other two circuits, the water from the cylinder head 6'flows through the front heater 7'and the rear heater 8'respectively After the water pump 5'returns to the engine, these three circuits all belong to the engine small cycle. After the vehicle is started, all the small circulation circuits always remain unblocked. When the engine water temperature rises and the ...

AI Technical Summary

Problems solved by technology

[0003] In the above-mentioned cooling system, there are three circuits in the engine when the cycle is small, and the warm air is a separate circuit. In order to ensure the effect of warm air, the engine will sacrifice part of the flow, which may cause the engine to warm up slowly, especially in cold environments. It has a great negative impact on the fuel consumption and working efficiency of the diesel engine; and the oil cooler and the EGR cooler are directly connected in a small cycle after being connected in series, and the two are not easy to control the coolant flow and the working temperature required by each other; in addition, the EGR cooling The EGR is only in the small cycle and does not participate in the large cycle. If the EGR overheats later, its cooling problem is not easy to rectify, which increases the heat load of the engine

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