Methanol engine cold starting control system and method for vehicle

Abstract

The invention provides a methanol engine cold starting control system for a vehicle and belongs to the technical field of vehicle engine controlling. The system comprises a first temperature sensor, a second temperature sensor, a first heating element, a second heating element and a controller; the first temperature sensor is used for detecting the air temperature in an intake manifold, the second temperature sensor is used for detecting the methanol fuel temperature in a fuel rail fuel injector assembly, the first heating element is used for heating air in the intake manifold, the second heating element is used for heating the methanol fuel temperature in the fuel rail fuel injector assembly, and the controller is used for selectively starting and stopping the first heating element according to the air temperature and selectively starting and stopping the second heating element according to the methanol fuel temperature. According to the scheme of the methanol engine cold starting control system for the vehicle, when the environment temperature is suitable for methanol cold starting, the system is not started to heat, and thus energy resources can be saved; and when the air temperature and the methanol fuel temperature meet starting requirements, even if an engine is not started, the system automatically stops heating, so that the intake manifold and a fuel supplying pipeline are not damaged.

Description

technical field [0001] The invention relates to the technical field of vehicle engine control, in particular to a methanol engine cold start control system and method for vehicles. Background technique [0002] Methanol has many advantages as a vehicle fuel. However, due to its high ignition point, it is difficult to start a methanol vehicle at low temperature. In order to solve the low-temperature starting problem of methanol fuel, dual fuel rail technology is generally used at present, that is, gasoline is used as the starting fuel, and when the engine temperature reaches a certain level, it will switch to methanol fuel to work. [0003] The disadvantage of dual fuel rail technology is that the use of two sets of fuel rails requires space layout, making it impossible to take into account the best injection angles of the two sets of injectors, which affects fuel performance. In order to overcome the shortcomings of double oil rails, it is currently changing to single oil r...

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Problems solved by technology

[0005] The inventors have found that there are obvious defects and deficiencies in the solutions in the prior art, for example: 1) when the ambient temperature meets the cold start requirements, the engine still starts the positive temperature effect electric heater to heat the air, wasting energy

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