Variable-flow engine cooling system and method

Abstract

The invention provides a variable-flow engine cooling system and a method. The system comprises a water temperature sensor, a vehicle speed sensor, an intake air temperature sensor, a crankshaft position sensor, a torque sensor and an ECU. The water temperature sensor is used to collect the water temperature of the engine. The vehicle speed sensor is used for collecting the vehicle speed of the engine; the intake air temperature sensor is used for collecting the intake air temperature of the engine; the crankshaft position sensor is used to collect the rotational speed of the engine; the torque sensor is used to collect the load of the engine; the ECU is used for obtaining duty cycle accord to water temperature, vehicle speed, intake air temperature, rotational speed and / or load, and controlling the flow rate of the electronic pump according to the duty cycle; an external electronic pump can be arranged; when the engine warm-up is started, the electric water pump is controlled not to run or to run at low speed; when the engine is in the medium speed load condition, the flow rate of the electronic pump is controlled; the flow rate of the cooling system is increased to speed up the rapid cooling of the engine.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a variable flow engine cooling system and method. Background technique [0002] At present, in the circulation of the engine cooling system, the driving part is the electronic water pump of the engine, and the flow rate of the electronic water pump will directly affect the cooling capacity of the entire cooling system. [0003] When the engine is started cold, if the fluid in the engine remains still, it will speed up the warm-up of the engine, but because the electronic water pump is connected to the engine, when the engine starts, the electronic water pump will generate flow, thereby delaying the engine's warm-up. Warm up speed. [0004] When the engine is at a medium speed load, it is hoped that the electronic water pump will run at the fastest speed to take away the heat from the engine. However, the speed of the electronic water pump is related to the engine spee...

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Problems solved by technology

[0003] When the engine is started cold, if the fluid in the engine remains still, it will speed up the warm-up of the engine, but because the electronic water pump is connected to the engine, when the engine starts, the electronic water pump will generate flow, thereby delaying the engine's warm-up. warm-up speed

[0004] When the engine is at a medium speed load, it is hoped that the electronic water pump will run at the fastest speed to take away the heat from the engine. However, the speed of the electronic water pump is related to the engine speed. When the engine is at a medium speed, because the engine speed has not reached The maximum speed, so the flow rate of the electronic water pump cannot reach the maximum speed, which affects the rapid heat dissipation of the engine

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