Vehicle range analysis using driving environment information with optional continuous averaging
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60W-040/06
B60W-040/10
G01C-021/34
출원번호
US-0796202
(2013-03-12)
등록번호
US-8989999
(2015-03-24)
발명자
/ 주소
Vicharelli, Pablo A.
Fagen, Donna
출원인 / 주소
Equilateral Technologies, Inc.
대리인 / 주소
Cesari and McKenna, LLP
인용정보
피인용 횟수 :
0인용 특허 :
11
초록
Determining remaining vehicle range by adjusting measured estimates on the fly accounting for road effects, the state of vehicle accessories, and other conditions.
대표청구항▼
1. A method for determining range of a vehicle to follow along a projected route comprising: within a computerized apparatus, obtaining information concerning an estimated range, Dmax, for the vehicle;determining a route to a destination along roads available to be followed by the vehicle;dividing t
1. A method for determining range of a vehicle to follow along a projected route comprising: within a computerized apparatus, obtaining information concerning an estimated range, Dmax, for the vehicle;determining a route to a destination along roads available to be followed by the vehicle;dividing the route into a number, N, of road segments;for each such road segment, k, being followed by the vehicle, determining whether the respective road segment is of a certain type of road segment; andadding a factor to a running sum based on both the type of road segment and an energy spent to travel along the road segment, wherein energy spent to travel along each such road segment, k, is taken from ∑kn≤Nαkdk=Dmaxwheredk=skcos(θk) is a projection of the k-th segment sk on a ground reference; and αk=1(1+Γ)(1+Δ)[(μkμave)+(tan(θk)μave)+Γsec(θk)(vkvave)2+Δ(1+Γ)sec(θk)(Gk+HkGave+Have)] is a coefficient that weighs contributions for one or more current conditions that depend on one or more aspects of road slope angle θk, rolling resistance μk, velocity vk, driver behavior Gk, and accessory energy Hk for each road segment, k, relative to one or more aspects of measured values including a ratio of aerodynamic force to rolling resistance force Γ, and other forces including effective vehicle accessory forces Δ, average rolling resistance μave, average velocity vave, average driver behavior Gave, and average accessory energy Have; andadjusting the estimated range based on the running sum, to determine a location along the route where a remaining energy available for the vehicle to follow the route will reach a predetermined level; andon a display device located in the vehicle, displaying a representation of result of adjusting the estimated range. 2. The method of claim 1 wherein adjusting the estimated range further comprises continuously adjusting the range according to environmental conditions. 3. The method of claim 2 wherein the environment conditions comprise determining whether the vehicle has actually followed a particular road segment of a particular type along the route. 4. The method of claim 1 wherein adjusting the estimated range additionally comprises: continuously averaging the estimated range to account for an operating state of a vehicle accessory. 5. The method of claim 1 wherein a different estimated range is used depending upon an operating state of a vehicle accessory. 6. The method of claim 1 wherein the information concerning the type of road segment is taken from a stored map. 7. The method of claim 1 wherein the estimated range is derived from a fixed expected ratio of road types that include highway and city. 8. The method of claim 1 wherein the estimated range is further adjusted based on the type of road segment from Dcomb(k)=∑m=1Mam(k)Dm,k≤N where Dm is the maximum range associated with an environment type, m, for road segment k, with m being taken from at least city or highway, and Dcomb (k) is a resulting combined maximum range evaluated dynamically up to segment k as the vehicle travels, and where am(k)=1k∑j=1kδe(j),mwithδe(j),m={1,ife(j)=m0,otherwise with e(j) being an environment identifier for the j-th segment, with e(j)={1, 2, . . . , M}, δis a Kronecker delta, and am(k) is at least a city or highway cumulative weight for the m-th environment for a trip that has gone to the k-th segment.
Boss, Gregory Jensen; Hamilton, II, Rick Allen; Martine, Michael Jack; McConnell, Kevin C.; Miller, John Williams, Method and system for calculating least-cost routes based on historical fuel efficiency, street mapping and location based services.
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