2 results about "Engine coolant temperature sensor" patented technology

Internal combustion engine processes, including: Setting an internal combustion engine torque actuator based on the internal combustion engine oil temperature (EOT), estimated by applying an excitation signal, comprising a pulse-width modulated duty cycle, a voltage and an electric current, applied to a solenoid valve (OCV) of a variable cam control (VCT) device, and using an associated relationship stored in non-volatile memory (110) that controls the camshaft solenoid duty cycle and relates the camshaft angular velocity of the device to the combustion engine oil temperature (EOT), wherein the adjustment is made in response to degradation of a sensor used to measure the combustion engine oil temperature (EOT) directly or indirectly, and damage to the non-volatile memory (110), wherein the non-volatile memory (110) includes a keep-alive memory (KAM) of a combustion engine control unit (12), wherein the sensor includes one or more of an combustion engine oil temperature sensor (EOT) coupled to an oil pan, a combustion engine coolant temperature sensor (ECT), an air charge temperature sensor (ACT), and a mass airflow sensor (MAF).

This invention relates to the field of engine manufacturing heat treatment technology, and discloses an intelligent control method and system for engine cooling fans based on dual temperature sensors. The method includes acquiring the detection values ​​from an engine coolant temperature sensor and a radiator temperature sensor; determining whether the engine coolant temperature sensor detection value is greater than or equal to a large circulation opening temperature threshold; calculating the inlet and outlet water temperature difference when the determination result is yes; generating a target fan speed command by determining the gradient interval corresponding to the inlet and outlet water temperature difference and sending it to the cooling fan; statistically analyzing the duration for which the inlet and outlet water temperature difference is greater than or equal to a preset fault threshold; executing a conservative control strategy when the duration reaches an anti-shake time threshold; and determining whether the detection value reaches a preset absolute threshold to control the cooling fan to operate at full speed. This invention adjusts the fan operation state by calculating the inlet and outlet water temperature difference through dual temperature feedback, avoiding errors from a single temperature source determination, filtering out abnormal data interference, and maintaining safe cooling under fault conditions.