[특허]Process and system for determining fuel consumption of a motor vehicle

Bayerische Motoren Werke Aktiengesellschaft

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특허 상세정보

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Process and system for determining fuel consumption of a motor vehicle

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06F-019/00
미국특허분류(USC)	701/123; 701/022; 073/114.52; 073/114.53; 123/332; 123/333; 340/439
출원번호	US-0087630 (2011-04-15)
등록번호	US-8560215 (2013-10-15)
우선권정보	DE-10 2010 027 862 (2010-04-16)
발명자 / 주소	Cogiel, Janus Jilg, Herbert Rieger, Wolfgang
출원인 / 주소	Bayerische Motoren Werke Aktiengesellschaft
대리인 / 주소	Crowell & Moring LLP
인용정보	피인용 횟수 : 0 인용 특허 : 8

초록
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A process and system are provided for determining fuel consumption of a motor vehicle. A first mean fuel consumption, which cannot be reset under a user's influence, is determined. A second mean fuel consumption, which can be reset under a user's influence, is determined as a function of several measured values. A third mean fuel consumption is determined as follows: (a) at the beginning of a predefined time period, which starts with a resetting of the second mean fuel consumption, the third mean fuel consumption is set to be equal to the first mean fuel consumption; (b) between the beginning and the end of the predefined time period, the third mean fuel consumption is set to be a weighted mean of the first mean fuel consumption and the second mean fuel consumption; and, (c) starting at an end of the predefined time period, the third mean fuel consumption is set to be equal to the second mean fuel consumption. A signal indicative of the third mean fuel consumption is provided.

대표
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1. A process for determining fuel consumption of a motor vehicle, the process comprising the acts of: determining a first mean fuel consumption, which cannot be reset under a user's influence;determining a second mean fuel consumption, which is resettable under a user's influence, as a function of several measured values; anddetermining a third mean fuel consumption; wherein: (a) at a beginning of a predefined time period, which starts with a resetting of the second mean fuel consumption influenced by a user, the third mean fuel consumption is set to be equal to the first mean fuel consumption;(b) between the beginning and the end of the predefined time period, the third mean fuel consumption is set to be a weighted mean of the first mean fuel consumption and the second mean fuel consumption; and(c) starting at an end of the predefined time period, the third mean fuel consumption is set to be equal to the second mean fuel consumption; andproviding a signal indicative of the third mean fuel consumption. 2. The process according to claim 1, wherein the determining of the third mean fuel consumption comprises the act of: determining the third mean fuel consumption as a sum of the product of the second mean fuel consumption and a weighting factor plus the product of the first mean fuel consumption and a difference of one minus the weighting factor;wherein:at a beginning of the predefined time period, the weighting factor is set to a zero value,within the predefined time period, the weighting factor is determined in a linearly increasing manner as a function of an elapsed time period since the resetting of the second mean fuel consumption, andas of the end of the predefined time period, the weighting factor is set to a value of one. 3. The process according to claim 2, further comprising the act of: checking whether the motor vehicle is stopped and, when the motor vehicle is determined to be stopped, maintaining the elapsed time period since the resetting of the second mean fuel consumption constant. 4. The process according to claim 3, wherein the motor vehicle is determined to be stopped when a speed of the motor vehicle falls below a predefined speed threshold value. 5. The process according to claim 4, wherein the predefined speed threshold value is approximately equal to 15 km/h. 6. The process according to claim 2, further comprising the acts of: determining an actual fuel consumption as a function of several measured values;checking whether the actual fuel consumption is greater than the third mean fuel consumption; andwhen the actual fuel consumption is greater than the third mean fuel consumption, maintaining the elapsed time period since the resetting of the second means fuel consumption is constant. 7. The process according to claim 3, further comprising the acts of: determining an actual fuel consumption as a function of several measured values;checking whether the actual fuel consumption is greater than the third mean fuel consumption; andwhen the actual fuel consumption is greater than the third mean fuel consumption, maintaining the elapsed time period since the resetting of the second means fuel consumption is constant. 8. The process according to claim 4, further comprising the acts of: determining an actual fuel consumption as a function of several measured values;checking whether the actual fuel consumption is greater than the third mean fuel consumption; andwhen the actual fuel consumption is greater than the third mean fuel consumption, maintaining the elapsed time period since the resetting of the second means fuel consumption is constant. 9. The process according to claim 5, further comprising the acts of: determining an actual fuel consumption as a function of several measured values;checking whether the actual fuel consumption is greater than the third mean fuel consumption; andwhen the actual fuel consumption is greater than the third mean fuel consumption, maintaining the elapsed time period since the resetting of the second means fuel consumption is constant. 10. A device for determining fuel consumption of a motor vehicle, comprising: a first mean fuel consumption determining unit, which cannot be reset under a user's influence;a second mean fuel consumption determining unit, which is resettable under a user's influence, as a function of several measured values;a third mean fuel consumption determining unit, said third unit being operatively configured to: (a) at a beginning of a predefined time period, which starts with a resetting of the second mean fuel consumption, set the third mean fuel consumption to be equal to the first mean fuel consumption;(b) between the beginning and the end of the predefined time period, which starts with a resetting of the second of the second mean fuel consumption influenced by the user, set the third mean fuel consumption to be a weighted mean of the first mean fuel consumption and the second mean fuel consumption; and(c) starting at an end of the predefined time period, set the third mean fuel consumption to be equal to the second mean fuel consumption; anda signal indicative of the third mean fuel consumption. 11. A system for a motor vehicle, comprising: a device for determining fuel consumption of the motor vehicle, the device comprising: a first mean fuel consumption determining unit, which cannot be reset under a user's influence;a second mean fuel consumption determining unit, which is resettable under a user's influence, as a function of several measured values;a third mean fuel consumption determining unit, said third unit being operatively configured to: (a) at a beginning of a predefined time period, which starts with a resetting of the second mean fuel consumption, set the third mean fuel consumption to be equal to the first mean fuel consumption;(b) between the beginning and the end of the predefined time period, which starts with a resetting of the second of the second mean fuel consumption influenced by the user, set the third mean fuel consumption to be a weighted mean of the first mean fuel consumption and the second mean fuel consumption; and(c) starting at an end of the predefined time period, set the third mean fuel consumption to be equal to the second mean fuel consumption; anda signaling unit operatively coupled with the device for determining fuel consumption, the signaling unit receiving a signal indicative of the third mean fuel consumption from the device for determining fuel consumption and outputting a signal for a user of the motor vehicle.

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Process and system for determining fuel consumption of a motor vehicle

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Process and system for determining fuel consumption of a motor vehicle

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