A power source cold start control system and method

Abstract

The present invention provides a power source cold start control system and belongs to the new energy vehicle field. The system comprises a motor, an engine, a temperature acquisition module and a controller; and the fuel of the engine is methanol; the controller is configured to select the motor as a main power source to drive a hybrid vehicle when the temperature of a cooling medium is not higher than a minimum preset value, to select the motor as a main power source to drive the hybrid vehicle and control the engine to enter an idling state when the temperature of the cooling medium rises to a temperature not higher than an intermediate preset value, and to select the engine as a main power source to drive the hybrid vehicle when the temperature of the cooling medium rises to a temperature not higher than a maximum preset value. According to the power source cold start control system of the invention, based on the characteristics of the hybrid vehicle, a reasonable control strategy is adopted, and a cooling system is briefly improved, and therefore, the problems of difficulty in methanol vehicle start and high possibility of generating unconventional emissions can be solved, and the effective utilization rate of methanol fuel can be improved.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a power source cold start control system and method. Background technique [0002] In order to alleviate the pressure brought by the shortage of oil resources, the development of new energy sources for vehicles has become an effective method. Due to the advantages of good power, good economy, convenient use and reduced emissions, methanol vehicles are expected to become a substitute for gasoline. [0003] However, when methanol is used as an alternative fuel for fuel vehicles, there are problems such as difficulty in engine cold start and easy generation of unconventional emissions. The reason why the engine is difficult to start cold is that the engine speed is low during cold start, especially in winter, when the outside temperature is low, methanol atomization is difficult. Since the latent heat of vaporization of methanol is more than three times that of gasoline, methano...

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Problems solved by technology

[0004] The inventors of the present application have found that currently there are few ways to solve the two problems of difficult start-up and unconventional emissions of methanol vehicles at the same time, and most of them are costly, which limits their wide application

Even if the above two problems can be solved at the same time, for urban roads, for example, when there are many traffic lights and the vehicles need to start and stop frequently, methanol vehicles still have the problems of insufficient combustion and low fuel utilization.

In order to solve the problem of frequent start and stop of vehicles, there are gasoline-electric hybrid vehicles in the prior art

The inventor hopes to simultaneously solve the problems of difficult starting of methanol vehicles, easy generation of unconventional emissions and improvement of the effective utilization of methanol fuel

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