Thermal test and analysis for ECU of common-rail diesel engine
ZHANG Jibao
ZHANG Xin
QIN Zhihan
HOU Xiaosen
Abstract：The integration and miniaturization of diesel engine ECU as well as poor working condi-tions are likely to result in the failure of ECU''s components.In order to study the thermal load of ECU,thermal test and analysis of diesel engine ECU under different operation modes and envi-ronment temperatures are performed through the ECU thermal test system.It''s found out that the rotational speed and the torque of diesel engine will affect the power loss of ECU''s compo-nents.About 75％ of components''temperature reaches maximum when diesel engine operates at rated power,but the temperature of components in injector solenoid valve drive module reaches maximum under maximum torque condition and are significantly affected by the operation condi-tions of diesel engine.The environment temperature affects heat transfer so that the temperature difference between ECU''s components and environment decreases first and then increases with the increase of environment temperature.As environment temperature up to 105 ℃,temperature of ECU components is closed to 125 ℃ which is permissible temperature and the improvement of cooling condition for components is required.
Keywords：diesel engineECUthermal analysisoperation conditionstemperature
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 101-106 )