An Economical Cooperative Adaptive Cruise Strategy Using Glide Mode

An adaptive cruise and economical technology, applied in the field of vehicle engineering, to achieve the effect of reducing the distance between vehicles, being easy to realize in real time, and increasing the fuel saving effect.

Active Publication Date: 2019-05-14
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This strategy prevents the vehicle from starting and stopping during driving by planning the speed, which effectively saves fuel consumption, but it uses a fixed speed planning range, resulting in the vehicle having to be geared to slow down
This also leads to the fact that the strategy still has great fuel saving potential

Method used

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  • An Economical Cooperative Adaptive Cruise Strategy Using Glide Mode
  • An Economical Cooperative Adaptive Cruise Strategy Using Glide Mode
  • An Economical Cooperative Adaptive Cruise Strategy Using Glide Mode

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Embodiment Construction

[0036] refer to figure 1 , figure 1 The Lighthill-Whitham-Richard (LWR) model shown is a classic model describing the dynamic characteristics of road vehicle traffic. The model assumes an existing, widely used relationship between flow and traffic density:

[0037] q(x,t)=Q(ρ(x,t));

[0038] Among them, q(x, t), ρ(x, t) represent the vehicle flow and density at time t and space x respectively, the unit of q(x, t) is vehicle / h, ρ(x, t ) unit is vehicle / km. In this model, due to the continuous conversion of red lights and green lights, the fleet model will produce sparse fluctuations, for example, in figure 1 Due to the sudden red light ahead, the vehicles in front of the convoy that do not pass the stop line must slow down to zero, and the following vehicles behind will also stop accordingly. Area A is the normal driving speed of vehicles between the stop line and the intervention start line area The line is not affected by the red light or the vehicle in front. The slope ...

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Abstract

The invention belongs to the technical field of vehicle engineering, and particularly relates to economical collaborative adaptive cruise control by means of a sliding mode. According to the economical collaborative adaptive cruise control, a corresponding implementation strategy can be determined based on the area where a target vehicle is located, and the corresponding guidance speed is provided. At an intersection with traffic lights, the influence of the length of a vehicle queue waiting in front in the condition of red light control is considered, so that a strategy of engine idling neutral-gear sliding is adopted; through selection of the appropriate sliding time, the target vehicle can smoothly pass by the intersection without stopping to wait, the minimum vehicle distance between the target vehicle and a front car is maintained, and the best economical collaborative adaptive cruise control of fuel economy is achieved at the same time.

Description

technical field [0001] The invention belongs to the technical field of vehicle engineering, and in particular relates to an economical cooperative self-adaptive cruising strategy adopting a sliding mode. Background technique [0002] Coordinated Adaptive Cruise Control (CACC) is a second-level autonomous driving proposed by the National Highway Traffic Safety Association (NHTSA) and the Society of Automotive Engineers (SAE). It is developed from Adaptive Cruise Control (ACC). Due to the communication between vehicles, between vehicles and roads, and even between vehicles and various infrastructures, cooperative adaptive cruise can keep a smaller inter-vehicle distance between the following vehicle and the followed vehicle, and due to the information between the vehicle and the environment Interaction can enable the vehicle to achieve better fuel economy. [0003] Malakorn and Park proposed a cooperative adaptive cruise strategy, which can use SpaT information to reduce the ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B60W30/14G08G1/00
CPCB60W30/143G08G1/22
Inventor高炳钊闫勇军郭露露陈虹
OwnerJILIN UNIV