Automobile engine and engine warming control method and device of same

Abstract

The invention discloses an automobile warming control method of an automobile engine, wherein the engine comprises an EGR valve and an EGR cooler, and the EGR valve is located between the EGR cooler and a vent pipe of the engine. The method comprises the steps that engine warming calibration values corresponding to each parameter which respectively stand for an engine working condition, an engine state and an environment state are stored; each of the current parameters which respectively stand for the engine working condition, the engine state and the environment state under a current state is obtained; a precondition of engine warning is that each of the current parameters is less than the corresponding engine warming calibration values, and an opening degree of the EGR valve is adjusted according to the current engine working condition in order to realize the engine warming; and the engine warming is completed when a current engine temperature exceeds a preset engine temperature. The method realizes the quick engine warming by an EGR system installed in the engine and will not influence parts and normal work of the engine during the engine warming. The invention also discloses an automobile warming control device of the automobile engine and the automobile engine with the device.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an automobile engine and its warm-up control method and device. Background technique [0002] The best working temperature of a car engine is generally 90°C to 110°C (coolant temperature). In winter or other low temperature conditions, the engine needs to be warmed up after starting. Generally, the lower the temperature, the longer the warm-up time. longer. However, if the warm-up time is longer, it will increase the mechanical friction of the engine and increase fuel consumption, resulting in a decrease in the efficiency and reliability of the engine. [0003] At present, a commonly used way to shorten the engine warm-up time is to use the exhaust brake valve to quickly warm up the vehicle. Specifically, when the current working condition of the engine meets the warm-up condition, the exhaust brake valve is controlled to switch to the warm-up working position (that is, the val...

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Problems solved by technology

[0005] When the exhaust brake valve is in the warm-up position, the exhaust gas cannot be discharged, and the exhaust gas pressure in front of the turbocharger of the engine will rise rapidly. If it is too large, it will affect the reliability of the turbocharger, and then affect the working performance of the engine; At the same time, for an engine equipped with an EGR (Exhaust Gas Recirculation, exhaust gas recirculation) system, when the exhaust brake is used to warm up the engine, the instantaneous high pressure will impact the EGR valve,

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