Heating method and system and vehicle

Abstract

The invention provides a heating method and system and a vehicle. The heating method is applied to the heating system. The heating system comprises a hydrogen supply device connected with an engine exhaust manifold, a preheating device arranged on the engine exhaust manifold and a whole vehicle exhaust pipe. The method comprises the following steps: under the condition that a starting signal for an engine system is received, controlling a preheating device to conduct preheating and temperature rising on the preheating device; and under the condition that the temperature value of the preheatingdevice corresponding to preheating and temperature rising of the preheating device reaches a preset temperature value, controlling the hydrogen supply device to cooperate with the preheating device to combust hydrogen to generate hot gas, and transmitting the hot gas to the whole vehicle exhaust pipe, wherein the hydrogen supply device is matched with the preheating device, so that hydrogen can be combusted to quickly and continuously generate hot gas, related components such as an EGR system and an LNT connected to the whole vehicle exhaust pipe can be continuously and quickly heated, the cold starting performance of a diesel engine can be improved, the warm air effect of a diesel engine vehicle can be improved, and the fuel consumption can be reduced.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a heating method, system and vehicle. Background technique [0002] Diesel engines have the characteristics of high thermal efficiency and fuel economy, and have been widely used in the field of vehicle technology. [0003] At present, the problems of diesel engine vehicle exposure include the following five aspects: [0004] First, the cold start performance of the diesel engine is worse than that of the gasoline engine. The gasoline engine can complete the start in the environment of -35 degrees Celsius, while the diesel engine is difficult to start in the environment of -25 degrees Celsius. [0005] Second, because the cooling temperature of the diesel engine rises much slower than that of the gasoline engine, the heating effect of the diesel engine vehicle is poor. [0006] The third is: For the aftertreatment system of diesel engine vehicles, the aftertreatment system can...

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Problems solved by technology

[0010] In view of this, the present invention aims to propose a heating method, system and vehicle to solve the problem that the cold start performance of a diesel engine is poorer than that of a gasoline engine, the warm air effect of a diesel engine vehicle is poor, and the aftertreatment system of a diesel engine vehicle When the internal temperature of the LNT is lower than 190 degrees Celsius, it cannot work normally. The current solution to this problem is to control the multiple injections of the diesel engine to achieve the effect of heating up, but it will increase the fuel consumption; the precious metal coating inside the LNT can only last for about 20 minutes at the internal temperature. To complete the desulfurization work at a temperature greater than 650 degrees Celsius, the diesel engine needs to inject more fuel to increase the exhaust temperature, which will increase the fuel consumption; the exhaust temperature of the diesel engine is relatively low. If the DPF temperature is to continue to exceed the preset temperature, the engine needs to Multiple injections of fuel are used to increase the exhaust temperature, resulting in a problem of high fuel consumption

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