Energy-saving control system of vehicle engine, method, device and engineering vehicle

Abstract

The invention relates to the technical field of engineering vehicles, and discloses an energy-saving control system of a vehicle engine, a method, a device and an engineering vehicle. The energy-saving control system of the vehicle engine, the method, the device and the engineering vehicle are used for increasing the running load rate of the engine and lowering the oil consumption of the engine in the transportation operation process of the engineering vehicle by adjusting load operation gears of a multi-state switch. The system comprises the multi-state switch, the control device and an engine electronic control unit. The multi-state switch is provided with at least two load operation gears. The control device is in signal connection with the multi-state switch and used for determining the current whole vehicle load and the current load operation gear of the vehicle and outputting adjusting signals to the multi-state switch according to the current load operation gear so that the multi-state switch can be configured to the current load operation gear. The engine electronic control unit is in signal connection with the multi-state switch and used for storing a set engine external characteristic curve corresponding to each load operation gear and controlling the engine to output the torque and rotating speed not larger than those limited by the corresponding engine external characteristic curve according to the current load operation gear of the multi-state switch.

Description

technical field [0001] The invention relates to the technical field of engineering vehicles, in particular to an energy-saving control system, method, and device for a vehicle engine and an engineering vehicle. Background technique [0002] The engine is the power source of the concrete mixer truck. With the rise of oil prices, the fuel cost in the transportation operation accounts for an increasing proportion of the operating cost of the concrete mixer truck. In order to reduce the fuel consumption of the engine, the existing technology is usually set up with the engine The multi-state switch connected to the signal of the electronic control unit, the driver toggles the multi-state switch to the corresponding load operation gear according to the working conditions of the whole vehicle, and the electronic control unit of the engine limits the output of the engine according to the current load operation gear of the multi-state switch Torque and speed, so that the engine runs ...

AI Technical Summary

Problems solved by technology

[0003] However, the inventors of the present application found that in the prior art, the driver judges the load-bearing operation condition and toggles the multi-state switch based on subjective experience, the adjustment and control accuracy is low, and it is difficult to ensure that he will actively perform the corresponding operation every time. Therefore, there is still the possibility that the load rate of the engine operation is low, and the engine consumes more fuel, which makes the production cost higher

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