Diesel engine automatic preheating device

Abstract

The invention discloses a diesel engine automatic preheating device. The structure of the diesel engine automatic preheating device is as follows: a glow plug and a jacket heater are respectively arranged on the left lower end and the left side wall of a cylinder cover jacket, and a water temperature sensor is assembled in a small circulating water path of a thermostat; a controller is connected respectively to power supply interfaces of the glow plug, the jacket heater and the temperature sensor through circuit wiring harnesses; the glow plug and the jacket heater jointly heat air entering a combustion chamber, the controller automatically judges the connection / disconnection and the heating time of the glow plug and the jacket heater according to a temperature signal output by the water temperature sensor, and the controller can automatically regulate the preheating time according to the temperature of an engine jacket, thereby automatically controlling the work states of the glow plug and the jacket heater. When a diesel engine is started at a low temperature, the work is stable and soft, the wear of engine components can be effectively reduced, and the service life of the engine is prolonged while fuel is saved. The device also has the advantages of being simple and convenient to mount, being safe and reliable, being convenient to maintain and being energy-saving.

Description

technical field [0001] The invention belongs to engine components, in particular to a device for automatically preheating a diesel engine at low temperature. Background technique [0002] Cold start performance is an important index to measure the technical level of diesel engines, and it is also one of the main factors that determine the scope of use of diesel engines. As we all know, when a diesel engine is started in winter or in a severe cold area, due to the increase of oil viscosity at low temperature, the rotation resistance of the engine crankshaft increases, resulting in a decrease in the starting speed. The low temperature will also vaporize or mix the fuel poorly, reduce the voltage of the battery, and increase the fuel consumption rate of the engine. Therefore, increasing the starting temperature has an important relationship with improving the performance of the engine. [0003] Generally, the preheating system of diesel engines mainly adopts low-temperature i...

AI Technical Summary

Problems solved by technology

The flame preheating effect is better, but it has the disadvantage of complex and precise control; the electric preheating structure is simple but has the disadvantage of small preheating power

In addition, there is a fuel heater preheating system, which can heat the circulating coolant and engine oil at the same time, and has a good cold start effect, but the structural installation size is too large, and it is mainly used in large engines.

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