Technique for calculating distance to empty in electric vehicle
First Claim
1. A method for calculating a Distance to Empty (DTE) in an electric vehicle, comprising:
- calculating, by at least one controller, a past driving average fuel efficiency;
calculating, by at least one controller, an air conditioning average energy consumption rate during at least one past driving cycle;
calculating, by at least one controller, a past driving average fuel efficiency which assumes an air conditioning apparatus is not used from the past driving average fuel efficiency and the air conditioning average energy consumption rate;
calculating, by at least one controller, a current driving fuel efficiency;
blending, by at least one controller, the past driving average fuel efficiency assumes the air conditioning apparatus is not used and the current driving fuel efficiency; and
calculating the DTE from the blended driving fuel efficiency,wherein the blending of the past driving average fuel efficiency and the current driving fuel efficiency is calculated by applying a weighted average method, wherein the weighted average method applies a weighted value to the past driving average fuel efficiency which assumes the air conditioning apparatus is not used and the current driving fuel efficiency,the average fuel efficiency is expressed as;
R0={A1×
a[0]+A2×
a[1]+A3×
a[2] . . . +An×
a[n−
1]+B×
b[0]}/(A1+A2+A3+ . . . An+B)where R0 is the past driving average fuel efficiency, A1, A2, A3, An and B denote weighted value, a[0], a[1], a[2], and a[n−
1] denote fuel efficiencies of each driving cycle, and b[0] denotes a certified fuel efficiency.
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Abstract
Disclosed is a technique for calculating Distance to Empty (DTE) in an electric vehicle. In the disclosed technique, a past driving average fuel efficiency is calculated. An air conditioning average energy consumption rate during past driving is calculated. A past driving average fuel efficiency when assuming an air conditioning apparatus is not used from the past driving average fuel efficiency and the air conditioning average energy consumption rate is calculated. A current driving fuel efficiency is calculated. Then the past driving average fuel efficiency when assuming the air conditioning apparatus is not used and the current driving fuel efficiency are blended, and the DTE is calculated from the blended driving fuel efficiency.
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Citations
9 Claims
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1. A method for calculating a Distance to Empty (DTE) in an electric vehicle, comprising:
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calculating, by at least one controller, a past driving average fuel efficiency; calculating, by at least one controller, an air conditioning average energy consumption rate during at least one past driving cycle; calculating, by at least one controller, a past driving average fuel efficiency which assumes an air conditioning apparatus is not used from the past driving average fuel efficiency and the air conditioning average energy consumption rate; calculating, by at least one controller, a current driving fuel efficiency; blending, by at least one controller, the past driving average fuel efficiency assumes the air conditioning apparatus is not used and the current driving fuel efficiency; and calculating the DTE from the blended driving fuel efficiency, wherein the blending of the past driving average fuel efficiency and the current driving fuel efficiency is calculated by applying a weighted average method, wherein the weighted average method applies a weighted value to the past driving average fuel efficiency which assumes the air conditioning apparatus is not used and the current driving fuel efficiency, the average fuel efficiency is expressed as;
R0={A1×
a[0]+A2×
a[1]+A3×
a[2] . . . +An×
a[n−
1]+B×
b[0]}/(A1+A2+A3+ . . . An+B)where R0 is the past driving average fuel efficiency, A1, A2, A3, An and B denote weighted value, a[0], a[1], a[2], and a[n−
1] denote fuel efficiencies of each driving cycle, and b[0] denotes a certified fuel efficiency. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:
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program instructions that calculate a past driving average fuel efficiency; program instructions that calculate an air conditioning average energy consumption rate during at least one past driving cycle; program instructions that calculate a past driving average fuel efficiency which assumes an air conditioning apparatus is not used from the past driving average fuel efficiency and the air conditioning average energy consumption rate; program instructions that calculate, a current driving fuel efficiency; program instructions that blend the past driving average fuel efficiency assumes the air conditioning apparatus is not used and the current driving fuel efficiency; and program instructions that calculate the DTE from the blended driving fuel efficiency, wherein the blending of the past driving average fuel efficiency and the current driving fuel efficiency is calculated by applying a weighted average method, wherein the weighted average method applies a weighted value to the past driving average fuel efficiency which assumes the air conditioning apparatus is not used and the current driving fuel efficiency, the average fuel efficiency is expressed as;
R0={A1×
a[0]+A2×
a[1]+A3×
a[2]+ . . . +An×
a[n−
1]+B×
b[0]}/(A1+A2+A3+ . . . An+B)where R0 is the past driving average fuel efficiency, A1, A2, A3, An and B denote weighted value, a[0], a[1], a[2], and a[n−
1] denote fuel efficiencies of each driving cycle, and b[0] denotes a certified fuel efficiency. - View Dependent Claims (9)
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Specification