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Intelligent method for controlling warming-up of engine

An intelligent control and engine technology, applied in engine control, machine/engine, electrical control, etc., can solve problems such as engine starting torque limitation, damage to after-processing parts, and obstacles to normal use of vehicles, so as to avoid engine damage and avoid zero damage. Part damage, shortening the effect of urea thawing time

Active Publication Date: 2015-03-18
SHANGHAI HINO ENGINE
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Problems solved by technology

At present, many users in cold regions do not wait for the urea in the SCR system to fully thaw and run the vehicle, resulting in after-treatment failures, which limit the engine starting torque and hinder the normal use of the vehicle, and may even cause damage to after-treatment components. Therefore, the urea thawing time is long. Main Problems of Vehicle SCR System in Cold Area

Method used

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  • Intelligent method for controlling warming-up of engine

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Embodiment Construction

[0025] The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples.

[0026] This embodiment provides an intelligent control method for engine warm-up, such as figure 1 shown, including the following steps:

[0027] Step 100, an ECU is powered on, and the ECU judges whether the water temperature value of an engine obtained by an engine water temperature sensor is less than or equal to 0 degrees, judges whether the ambient temperature value obtained by an ambient temperature sensor is less than or equal to minus 20 degrees, and judges whether an after-processing system Whether the urea needs to be thawed, if both are yes, then enter step 101, if at least one is judged as no, then end the flow process;

[0028] Step 101, judging whether a neutral switch is closed, judging whether an idle switch is closed, if both are yes, then enter step 102, if at least one judgment is no, then enter step 103; ...

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Abstract

The invention discloses an intelligent method for controlling warming-up of an engine. The method comprises the following steps that: an engine electronic control unit (ECU) is subject to cold start according to a water temperature value measured by a water temperature sensor of the engine and an ambient temperature value measured by an ambient temperature sensor, the rotation speed of the engine is increased, the speed of a vehicle is limited, when the rotation speed of the engine is increased to 850rpm, an exhaust brake is driven, when temperature of cooling water of the engine is increased to 30 DEG C and urea is unfrozen in a post-processing system, the rotation speed of the engine is reduced to a default idling speed of the engine, the exhaust brake is turned off, and the speed limitation function is removed. The intelligent engine ECU controls the rotation speed and the exhaust brake system of the engine, an aim of shortening warming-up time of the vehicle and freezing time of the urea in the post-processing system, and damages to the engine or auto parts due to long warming-up time or long freezing time of the urea in the post-processing system can be avoided.

Description

technical field [0001] The invention relates to an electronic intelligent control method in the field of automobiles, in particular to an intelligent control method for engine warm-up. Background technique [0002] Cars running in cold regions need to warm up for a long time after starting, so that the lubrication system can fully establish a lubricating oil film, so as to avoid wear or even damage to mechanical parts. However, at present, the engine warm-up time is mostly 5-10 minutes, which is relatively long. Many users in cold regions drive vehicles without waiting for the engine to fully warm up due to use problems, causing damage to the engine. [0003] In addition, due to stricter emission regulations, the current automobile needs to be equipped with an after-treatment system, and SCR (selective catalytic reduction) system is used as the after-treatment system in my country. Before normal use of vehicles in cold regions, the urea in the aftertreatment system will cry...

Claims

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Application Information

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IPC IPC(8): F02D43/00
Inventor 牛颢程孙崎杨俊武
Owner SHANGHAI HINO ENGINE
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