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
CN104421030AActive Publication Date: 2015-03-18SHANGHAI HINO ENGINE
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI HINO ENGINE
Publication Date
2015-03-18

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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.
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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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