Engine Thermal Management System

Abstract

The invention discloses an engine thermal management system, which comprises an engine water pump, a first branch, a second branch, a third branch and a fourth branch; The cylinder head valve downstream of the water jacket, the liquid inlet end of the first branch is connected with the liquid outlet of the engine water pump; the cylinder water jacket and the cylinder thermostat installed downstream of the cylinder water jacket are arranged on the second branch, The liquid inlet end of the second branch is connected with the liquid outlet of the engine water pump; the radiator valve and the radiator arranged downstream of the radiator valve are arranged on the third branch, and the liquid outlet of the third branch is connected with the inlet of the engine water pump. The liquid ends are connected; the liquid outlet of the first branch, the liquid outlet of the second branch and the liquid inlet of the third branch are all connected to the fourth branch. The application reduces the pressure loss of the entire cooling system, thereby reducing the displacement and head of the engine water pump, that is, reducing its power consumption. At the same time, it can ensure that the temperature of the coolant at the engine block position rises rapidly during the cold start of the engine, improving cold start emissions.

Description

Engine Thermal Management System technical field [0001] The present invention relates to the technical field of cooling systems, in particular to an engine thermal management system. Background technique The thermal management system of the engine mainly includes a cooling water jacket, a water pump, a thermostat, a heater core, an engine oil cooler, a variable It is composed of parts such as gearbox oil cooler, radiator, cooling fan and cooling pipeline. In the traditional engine thermal management system, the cylinder block and the cylinder head water jacket are usually designed in series, and the peripheral cooling circuit is The series-parallel design is generally adopted, which makes the pressure loss of the entire cooling system larger, resulting in larger flow and head of the pump, and more power consumption. The thermostat has a normally open circuit. When the engine is cold started, the coolant at the position of the engine block heats up slowly. such as tr...

AI Technical Summary

Problems solved by technology

[0003] In the traditional engine thermal management system, the cylinder block and cylinder head water jacket are usually designed in series, and the peripheral cooling circuit is generally designed in series and parallel, which makes the pressure loss of the entire cooling system larger, resulting in larger flow and head of the water pump, and more power consumption , there is a normally open circuit in the thermostat, when the engine is cold started, the temperature of the coolant at the engine block rises slowly

For example, the opening and closing of the traditional wax-type thermostat is achieved by passively sensing the engine coolant temperature, which has limitations in actively adjusting the coolant flow of each circuit according to the engine operating conditions, that is, it is difficult to ensure that the engine works at its optimum level under different operating conditions. at coolant temperature

The warm air heating of the passenger compartment in a low temperature environment and the gearbox cooling strategy in a normal temperature and high temperature environment are not clear, and it is impossible to take into account the benefits of both

At the same time, the traditional thermostat has a normally open circuit, and zero flow control cannot be achieved during the warm-up period. There is always heat exchange with other components from the cold start, causing the warm-up process to be slow

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