Control method for fast start preheating device of hybrid electric vehicle

Abstract

The invention discloses a quick-start preheating device and a control method for a hybrid electric vehicle, comprising: a heating chamber, an air circulation device is arranged on the outside, a heating plate and a water exchange pipe are arranged inside, and a current controller and a flow controller respectively pass through the heating chamber. It is connected with the heating chamber, and a temperature sensor is installed at the inlet and outlet of the heat exchange pipe and the heating plate. The temperature sensor is also connected with the current controller and the flow controller to control the amount of current and heat exchange fluid, and also control the conduction of the current. with disconnect. Due to the setting of the controller, the present invention has the characteristics of controllable current volume and heat exchange fluid volume and current switch controllable at the same time, so that the present invention also has the characteristics of fast heating and heat transfer speed, small heat loss, high heat conversion rate, and energy saving energy consumption etc.

Description

technical field [0001] The invention relates to the technical field of preheating of a hybrid electric vehicle, in particular to a control method of a quick-start preheating device of a hybrid electric vehicle. Background technique [0002] In winter in the northern and western plateau areas, the ambient temperature is very low, which has a great impact on engine starting. In order to make the engine start quickly under low temperature conditions at different temperatures, it is necessary to install an auxiliary device to improve starting to promote full use of fuel and reduce starting resistance. As a universal heater, the fuel heater is as a general-purpose heater, such as the Chinese invention patent application 201410625694.8 introduces a low-temperature starting device for an automobile engine. By restricting the cold air, it provides a device that facilitates the low-temperature starting of the engine. However, due to the low temperature in winter, the viscosity of the...

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Problems solved by technology

In order to make the engine start quickly under low temperature conditions at different temperatures, it is necessary to install an auxiliary device to improve starting to promote full use of fuel and reduce starting resistance. As a universal heater, the fuel heater is as a general-purpose heater, such as the Chinese invention patent application 201410625694.8 introduces a low-temperature starting device for an automobile engine. By restricting the cold air, it provides a device that facilitates the low-temperature starting of the engine. However, due to the low temperature in winter, the viscosity of the fuel increases, the starting resistance torque increases, and the ignition speed is slow. The problem of long thermal energy conversion time, so changing the preheating energy at low temperature can help improve heating efficiency, but now the heating energy in the process of common use has not changed with the change of the external environment temperature, and the disconnection and conduction cannot Timely control results in waste of energy. At the same time, the heat exchange efficiency is low, and the excessive heat loss is also an inevitable problem in the low-temperature start-up heating process.

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