Engineering vehicle power system matching method and system

Abstract

The invention discloses a method for matching a dynamic system of an engineering vehicle, which uses an electrically-controlled engine, wherein the engine demarcates engine power and engine torque under different working conditions. The method comprises the steps: obtaining current working condition of the engineering vehicle, including current load state; according to the current working condition, switching output torque of the engine to demarcated torque of the engine corresponding to the current working condition so that the engine operates on an external characteristic curve of the engine corresponding to the current working condition. The invention can provide corresponding power output under different load states so as to realize the effects of energy conservation and environmental protection. The invention also discloses a matching system for the dynamic system of the engineering vehicle.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a matching method and system for an engineering vehicle power system. Background technique [0002] Engineering vehicles, such as truck cranes, concrete mixer trucks, large pump trucks, etc., generally have several load operating load states (such as heavy load and light load). Under normal driving and parking conditions, the engine is required to have different output characteristics, but the power system matching of existing engineering vehicles cannot fully meet the requirements of energy saving and environmental protection. [0003] For example: the concrete mixer truck is often loaded with a fixed volume of concrete during the transportation and feeding process, and the loading quality of the whole vehicle is constant; during the return process after unloading, the vehicle is in an empty state. Concrete mixer trucks always operate between these two states, and their loa...

AI Technical Summary

Problems solved by technology

Under two different power characteristics, the heat dissipation required by the engine system is very different; the ordinary silicone oil clutch fan can adjust the fan speed within a certain range to control the heat dissipation, but it cannot meet the large-scale heat dissipation requirements under different power characteristics.

In the case of using the same engine and the same set of cooling system, if the heat dissipation performance of the engine at different powers is not changed, the engine cannot run at the most suitable temperature, which will inevitably affect the engine life, combustion performance, power performance, and fuel economy. and the adverse effects of emissions

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