Heating system for cooling liquid of engine

Abstract

The invention provides a heating system for cooling liquid of an engine which is used for heating cooling liquid to heat the engine when the system is started at low-temperature environment. The system comprises an exhaustion pipeline for exhausting tail gas of the engine, wherein the exhaustion pipeline comprises a main pipe which is provided with an air inlet end and an exhaust end and is used for transmitting the tail gas to the outside of vehicles, a branch pipe of which one end is connected with the air inlet end of the main pipe and the other end is connected with the exhaust end of the main pipe, a valve which is arranged at a connection part of the main pipe and the branch pipe and is configured to selectively open or close the main pipe according to the temperature of the cooling liquid of the engine, and a heat exchanger which is communicated with the branch pipe and is used for transmitting the heat energy of the tail gas to the cooling liquid in the heat exchanger, wherein the branch pipe is configured to stop when the main pipe is opened and start when the main pipe is closed. By adopting the heating system for the cooling liquid of the engine, the carbon accumulation risk of idling speed of vehicles can be reduced, so that the vehicles can be quickly started and get away under a cold environment.

Description

technical field [0001] The invention relates to the technical field of vehicle low-temperature starting, in particular to an engine coolant heating system. Background technique [0002] A cold start is when the vehicle is started directly without warming up. A cold start can be detrimental to a vehicle's performance. One of the reasons is that the cold-started vehicle has not fully lubricated the various parts of the engine, especially the crankshaft parts that have not been lubricated completely, which are prone to breakage during work. Another reason is that the piston parts are prone to carbon deposits, which will cause the oil to deteriorate, reduce the driving ability of the vehicle, and shorten the service life of the engine. [0003] The solution in the prior art is to reduce the heat dissipation power of the engine, thereby increasing the temperature rise rate of the engine water temperature. However, the solutions in the prior art are passive, and cannot make the...

AI Technical Summary

Problems solved by technology

But the scheme of prior art is passive, and can not make engine water temperature reach suitable temperature as soon as possible after vehicle is ready to start

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