SE541531C2 - Method and system for regulating the air composition in the interior space of a vehicle - Google Patents
Method and system for regulating the air composition in the interior space of a vehicleInfo
- Publication number
- SE541531C2 SE541531C2 SE1751429A SE1751429A SE541531C2 SE 541531 C2 SE541531 C2 SE 541531C2 SE 1751429 A SE1751429 A SE 1751429A SE 1751429 A SE1751429 A SE 1751429A SE 541531 C2 SE541531 C2 SE 541531C2
- Authority
- SE
- Sweden
- Prior art keywords
- vehicle
- interior space
- persons
- co2level
- estimated number
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00742—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models by detection of the vehicle occupants' presence; by detection of conditions relating to the body of occupants, e.g. using radiant heat detectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/008—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models the input being air quality
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
- B60G2400/60—Load
- B60G2400/61—Load distribution
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The present invention relates to a method for regulating the air composition in the interior space (S) of a vehicle (V). Said method comprises the steps of: determining (110) the COlevel in the interior space of said vehicle; and adapting (170) fresh air supply to the interior space of the vehicle based on said determined COlevel. The step of determining (110) the COlevel in the interior space of said vehicle comprises the steps of: detecting vehicle load by means of vehicle load detection means (112); comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase; transferring said vehicle load increase to estimated number of persons; and determining a COlevel based on the thus estimated number of persons.The present invention also relates to a system for regulating the air composition in the interior space of a vehicle. The present invention also relates to a vehicle. The present invention also relates to a computer program and a computer readable medium.
Description
METHOD AND SYSTEM FOR REGULATING THE AIR COMPOSITION IN THE INTERIOR SPACE OF A VEHICLE TECHNICAL FIELD The invention relates to a method for regulating the air composition in the interior space of a vehicle according to the preamble of claim 1. The invention also relates to a system for regulating the air composition in the interior space of a vehicle. The invention also relates to vehicle. The invention in addition relates to a computer program and a computer readable medium.
BACKGROUND ART In order to have fresh air in vehicles such as buses an exchange of air is performed by means of the heating, ventilation and air conditioning (HVAC) system of the vehicle. In order to secure high quality of the air in the interior space of passenger vehicles such as buses comprising avoiding a too high concentration of CO2the air exchange is normally performed in accordance with a worst case scenario, which in most cases results a much higher exchange rate than is necessary to secure the actual air quality in the vehicle.
Such a strategy is not energy efficient as the high air exchange rate will add energy consumption in the HVAC system.
Detecting the correct air quality through CO2sensors is complicated as sensor placement and number of sensors is critical to obtain correct detection of the CO2level. Further the sensor is a sensitive component prone to failure.
Further, the un-even CO2distribution in relation to sensor placement can generate large measurement deviations in relation to the real average CO2value.
W02007087939 A1 discloses a method for regulating an air composition in the interior space of a motor vehicle. The regulation of the air composition is based on the fresh air supply initially being measured by means of the opening parameters of the air supply of the motor vehicle. The CO2concentration in the interior space of the motor vehicle is subsequently calculated on the basis of the number of persons situated in the interior space. If the calculation yields an exceedance of a CO2threshold value, fresh air is supplied to the interior space of the motor vehicle in a targeted fashion.
OBJECTS OF THE INVENTION An object of the present invention is to provide a method for regulating the air composition in the interior space of a vehicle which in an easy and robust way facilitates energy efficient supply of fresh air for maintaining a desired air composition.
Another object of the present invention is to provide a system for regulating the air composition in the interior space of a vehicle which in an easy and robust way facilitates energy efficient supply of fresh air for maintaining a desired air composition.
SUMMARY OF THE INVENTION These and other objects, apparent from the following description, are achieved by a method, a system, a vehicle, a computer program and a computer readable medium, as set out in the appended independent claims. Preferred embodiments of the method and the system are defined in appended dependent claims.
Specifically an object of the invention is achieved by a method for regulating the air composition in the interior space of a vehicle: Said method comprises the steps of: determining the CO2level in the interior space of said vehicle; and adapting fresh air supply to the interior space of the vehicle based on said determined CO2level. The step of determining the CO2level in the interior space of said vehicle comprises the steps of: detecting vehicle load by means of vehicle load detection means; comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase; transferring said vehicle load increase to estimated number of persons; and determining a CO2level based on the thus estimated number of persons.
Hereby energy efficient supply of fresh air for maintaining a desired air composition in the interior space of said vehicle is facilitated in an easy and robust way.
Said vehicle load detection means may comprise one or more load detection sensors. Said vehicle load detection means may comprise one or more load detection sensors arranged in connection to the chassis of said vehicle. Said vehicle load detection means may comprise one or more load detection sensors arranged in connection to the wheel axles of the chassis of said vehicle. Said vehicle load detection means may comprise one or more load detection sensors arranged in connection to comprised in bellows of a vehicle having a suspension system with a bellows configuration comprising a set of bellows arranged in connection to the respective axles of the chassis of the vehicle.
According to an embodiment the vehicle load detection means may comprise means for determining bellows pressure in connection to the respective wheel axle and means for determining the vehicle weight based on said bellows pressure.
The step of comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase comprises according to an embodiment the step of subtracting the load of the vehicle, i.e. the weight of the vehicle, from the non-loaded vehicle, i.e. from the weight of the vehicle when there is no additional load comprising additional load of persons. Thus said additional load in a loaded vehicle is assumed to correspond to additional persons having entered and being present in the vehicle.
The weight of a non-loaded vehicle may be determined in any suitable way by means of any suitable means such as any suitable weight detector or the like. The weight of a non-loaded vehicle is according to an embodiment determined in the same way as for detecting the vehicle load of the vehicle.
The step of comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase may be performed by any suitable means for comparing said detected vehicle load to a non-loaded vehicle. Said means for comparing said detected vehicle load to a non-loaded vehicle comprises according to an embodiment calculation means for subtracting the weight of the non-loaded vehicle from the weight of the loaded vehicle. The means for comparing said detected vehicle load to a non-loaded may comprise any suitable computer, control unit, processor or the like.
The step of transferring said vehicle load increase to estimated number of persons thus refers to estimating the number of persons on board the vehicle based on the determined vehicle load increase. The step of transferring said vehicle load increase to estimated number of persons comprises processing said vehicle load increase and converting it to estimated number of persons.
According to an embodiment of the method the step of determining a CO2level based on the thus estimated number of persons is based on a predetermined interior space volume of said vehicle. Hereby a more accurate determination of CO2level in the interior space of the vehicle is obtained.
According to an embodiment the method comprises the step of estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons. Hereby a more accurate determination of CO2level in the interior space of the vehicle is facilitated. If a passenger vehicle such as a bus is filled with a lot of persons the actual volume of the interior space may affected, i.e. reduced, to a relatively substantial extent.
According to an embodiment of the method the steps of transferring said vehicle load increase to an estimated number of persons and determining a CO2level based on the thus estimated number of persons comprises the step of estimating an average weight for a person as well as an average CO2production of such a person. Hereby a more accurate determination of CO2level in the interior space of the vehicle is facilitated in that the weight of a person affects the CO2production of that person.
According to an embodiment the method comprises the step of, prior to transferring said vehicle load increase to an estimated number of persons, selecting a mode characterising a certain population of persons by mode selection means. Hereby a more accurate determination of CO2level in the interior space of the vehicle is facilitated in that the character, i.e. weight which may be affected by age, gender, length, of a certain population of persons affects the CO2level in the interior space of the vehicle.
The step of selecting a mode characterising a certain population of persons by mode selection means may according to an embodiment be performed by the driver of the vehicle, said driver of the vehicle operating said mode selection means.
Said mode selection means comprises according to an embodiment an actuator member. Said actuator member may comprise any suitable actuator member for selecting a mode characterising a certain population of persons. Said actuator member may comprise a switch, a touch screen or the like. Said actuator member is according to an embodiment configured to be operable by the driver of the vehicle. Hereby the driver may select a certain mode based on the character of the population of persons on board the vehicle.
Said mode selection means is according to an embodiment arranged to automatically select a mode based on a determined characteristics of the population of persons on board said vehicle.
The method comprises according to an embodiment the step of detecting, by detecting means, characteristics of population of persons on board said vehicle/entering said vehicle.
Said detecting means may be any suitable detection means and may be arranged to detect one or more of: gender, age, length, weight.
Specifically an object of the invention is achieved by a system for regulating the air composition in the interior space of a vehicle. Said system comprises means for determining the CO2level in the interior space of said vehicle; and means for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level. Said means for determining the CO2level in the interior space of said vehicle comprises: vehicle load detection means for detecting vehicle load; comparison means for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase; transferring means for transferring said vehicle load increase to estimated number of persons; and CO2determination means for determining a CO2level based on the thus estimated number of persons.
According to an embodiment of the system said CO2determination means for determining a CO2level based on the thus estimated number of persons is based on a predetermined interior space volume of said vehicle.
According to an embodiment the system comprises estimation means for estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons.
According to an embodiment of the system the transferring means for transferring said vehicle load increase to an estimated number of persons comprises estimation means for estimating an average weight for a person, wherein the CO2determination means for determining a CO2level based on the thus estimated number of persons comprises CO2estimation means for estimating an average CO2production of such a person.
According to an embodiment the system comprises mode selection means for selecting a mode characterising a certain population of persons prior to transferring said vehicle load increase to an estimated number of persons.
The system for regulating the air composition in the interior space of a vehicle is adapted to perform the methods as set out herein.
The system according to the invention has the advantages according to the corresponding method.
Specifically an object of the invention is achieved by a vehicle comprising a system as set out herein.
A computer program for regulating the air composition in the interior space of a vehicle, said computer program comprising program code which, when run on an control arrangement or another computer connected to the control arrangement, causes the control arrangement to perform the method as set out herein.
A computer readable medium comprising instructions which, when executed by a computer, cause the computer to carry out the method as set out herein.
BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the present invention reference is made to the following detailed description when read in conjunction with the accompanying drawings, wherein like reference characters refer to like parts throughout the several views, and in which: Fig. 1 schematically illustrates a side view of a vehicle according to the present invention; Fig. 2 schematically illustrates a plan view of the vehicle in fig. 1 ; Fig. 3 schematically illustrates a block diagram of a system for regulating the air composition in the interior space of a vehicle according to an embodiment of the present invention; Fig. 4 schematically illustrates a block diagram of a method for regulating the air composition in the interior space of a vehicle according to an embodiment of the present invention; and Fig. 5 schematically illustrates a computer according to an embodiment of the present invention.
DETAILED DESCRIPTION Hereinafter the term “link” refers to a communication link which may be a physical connector, such as an optoelectronic communication wire, or a nonphysical connector such as a wireless connection, for example a radio or microwave link.
Hereinafter the term “CO2level in the interior space of a vehicle” refers to the CO2concentration in the interior space of the vehicle, i.e. the CO2content in the atmosphere of the interior space of said vehicle.
Fig. 1 schematically illustrates a side view of a vehicle V according to the present invention, and fig. 2 schematically illustrates a plan view of the vehicle V in fig. 1.
The exemplified vehicle V is a is a passenger vehicle in the shape of a bus.
As illustrated in fig. 1, the vehicle V has an interior space S in which passengers are intended to be placed, preferably seated, when travelling with the vehicle. The vehicle comprises a system I for regulating the air composition in the interior space of a vehicle. The system is according to an embodiment a system in accordance with the system for regulating the air composition in the interior space of a vehicle described below with reference to fig. 3.
Said vehicle V comprises a configuration C for controlling flow of air A to and from said vehicle. Said configuration C is according to an embodiment comprised in or comprises the heating, ventilation and air conditioning (HVAC) system of the vehicle V.
Said configuration C comprises a regulation unit U arranged on the roof of said vehicle V. Said regulation unit U comprises one or more openings for allowing air A to pass into said vehicle. Said regulation unit U comprises a fresh air regulation member F arranged to facilitate control of a mixture of re-circulation of inside air and fresh outdoor air. Said fresh air control member comprises according to an embodiment one or more regulators configured to provide different positions in order to provide said control of a mixture of re-circulation of inside air and fresh outdoor air. Said one or more regulators may be any suitable regulators such as flaps, throttle member or the like for controlling said air flow.
Said regulation unit U comprises a heat exchanger configuration H comprising one or more heat exchangers for controlling the temperature of the air introduced into said vehicle V.
The vehicle comprises means 110 for determining the CO2level in the interior space S of said vehicle V. Said means 110 is comprised in said system I. Said means for determining the CO2level in the interior space of said vehicle comprises vehicle load detection means 112 for detecting vehicle load. Said detected vehicle load is arranged to be compared to a non-loaded vehicle so as to determine a load increase. The load increase is arranged to be transferred to an estimated number of persons. The CO2level is the arranged to be determined based on the thus estimated number of persons.
The vehicle comprises means 170 for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level. Thus, the fresh air supply to the interior space of the vehicle is adapted by said means 170 based on information of said determined CO2level.
The means 170 for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level comprises according to an embodiment means for controlling said fresh air regulation member F, i.e. one or more regulators, e.g. flaps, for regulating the amount of air being allowed to be introduced into said vehicle and for controlling a mixture of re-circulation of inside air and fresh outdoor air. Said means for controlling said fresh air regulation member F comprises controlling degrees of opening of said one or more regulators, e.g. flaps.
The means 170 for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level comprises according to an embodiment means for controlling one or more fan members for regulating the air flow into said vehicle interior space.
The means 170 for adapting fresh air supply to the interior space of the vehicle V based on said determined CO2level is according to an embodiment comprised in the heating, ventilation and air conditioning (FIVAC) system of the vehicle.
The means 170 for adapting fresh air supply to the interior space of the vehicle V is comprised in said system I.
Fig. 2 illustrates the chassis of the vehicle. The vehicle comprises a frame 2, 3, a front axle X1 with opposite front wheels RF, LF, a rear axle X2 with opposite first rear wheels RR1, LR1 and a rear axle X3 with opposite second rear wheels RR2, LR2. At least one of said rear axles X2 and X3 is a powered axle with tractive wheels.
The vehicle according to the present invention may have any suitable number of wheel axles. The vehicle according to the present invention may have one or more steerable axles. The vehicle according to the present invention may have one or more powered axles.
The vehicle V may be provided with any suitable suspension system. The vehicle is according to an embodiment provided with an air suspension system, not shown. Such an air suspension system may comprise a bellows configuration with bellows arranged in connection to the respective axles on the both sides of the vehicle.
The vehicle V comprises vehicle load detection means 112 for detecting vehicle load. Said vehicle load detection means 112 may be any suitable load detection means for detecting load of said vehicle. Said vehicle load detection means 112 may comprise one or more load detection sensors. Said vehicle load detection means 112 may comprise load detection sensors arranged in connection to or comprised in bellows when said vehicle has a suspension system with a bellows configuration comprising a set of bellows arranged in connection to the respective axle X1, X2, X3 of the vehicle V.
Said vehicle load detection means 112 comprises according to an embodiment a first load detection sensor L1 arranged in connection to the front axel X1 in connection to the right front wheel RF, a second load detection sensor L2 arranged in connection to the front axel X1 in connection to the left front wheel LF, a third load detection sensor L3 arranged in connection to the rear axel X2 in connection to the right first rear wheel RR1, a fourth load detection sensor L4 arranged in connection to the rear axle X2 in connection to the left first rear wheel LR1, a fifth load detection sensor L5 arranged in connection to the rear axle X3 in connection to the right second rear wheel RR2, and a sixth load detection sensor L6 arranged in connection to the rear axle X3 in connection to the left second rear wheel LR2.
Said load detection sensors L1, L2, L3, L4, L5, L6 are according to an embodiment weight sensors.
Said vehicle load detection means 112 may comprise any suitable number of load detection sensors. Said vehicle load detection means 112 may comprise any suitable number of load detection sensors arranged in connection to the respective wheel axle of the vehicle. There may thus be one or more load detection sensors arranged in connection one or more of said wheel axles.
According to an embodiment, for a vehicle having an air suspension system with a bellows configuration comprising a set of bellows arranged in connection to the respective axle X1, X2, X3 of the vehicle V, the pressure of bellows in connection to the respective wheel axle is determined by means of pressure determination means such as one or more pressure sensors. The vehicle weight is then arranged to be determined by means of processing said bellows pressure. The bellows pressure is according to an embodiment put into a function, in which function a weight value is obtained from a predetermined table for pressure and weight for the specific wheel axle of the vehicle. This may be adapted to the inclination of the vehicle.
Thus, according to an embodiment vehicle load detection means 112 may comprise means for determining bellows pressure in connection to the respective wheel axle and means for determining the vehicle weight based on said bellows pressure and said vehicle inclination.
The weight of a non-loaded vehicle may be determined in any suitable way by means of any suitable means such as any suitable weight detector or the like. The weight of a non-loaded vehicle is according to an embodiment determined in the same way as for detecting the vehicle load of the loaded vehicle as described above.
Fig. 3 schematically illustrates a block diagram of a system I for regulating the air composition in the interior space of a vehicle according to an embodiment of the present invention.
The system I comprises a control arrangement 100. Said control arrangement 100 may comprise any suitable control arrangement for facilitating safely controlling vehicle operation. Said control arrangement 100 may comprise one or more electronic control units, processing units, computers, server units or the like for facilitating safely controlling vehicle operation. Said control arrangement 100 may comprise control arrangement such as one or more electronic control units arranged on board said vehicle.
The system I comprises means 110 for determining the CO2level in the interior space of said vehicle.
Said means 110 for determining the CO2level in the interior space of said vehicle comprises vehicle load detection means 112 for detecting vehicle load.
Said vehicle load detection means 112 may comprise one or more load detection sensors. Said vehicle load detection means 112 may comprise one or more load detection sensors arranged in connection to the chassis of said vehicle. Said vehicle load detection means 112 may comprise one or more load detection sensors arranged in connection to the wheel axles of the chassis of said vehicle. Said vehicle load detection means 112 may comprise one or more load detection sensors arranged in connection to comprised in bellows of a vehicle having a suspension system with a bellows configuration comprising a set of bellows arranged in connection to the respective axles of the chassis of the vehicle.
According to an embodiment said vehicle load detection means 112 may comprise means for determining bellows pressure in connection to the respective wheel axle and means for determining the vehicle weight based on said bellows pressure and said vehicle inclination.
Said means 110 for determining the CO2level in the interior space of said vehicle comprises comparison means 114 for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase.
Thus, a load increase of the vehicle is arranged to be determined by subtracting the load of the vehicle, i.e. the weight of the vehicle, from the nonloaded vehicle, i.e. from the weight of the vehicle when there is no additional load comprising additional load of persons. Thus said additional load in a loaded vehicle is assumed to correspond to additional persons having entered and being present in the vehicle.
The weight of a non-loaded vehicle may be determined in any suitable way by means of any suitable means such as any suitable weight detector or the like. The weight of a non-loaded vehicle is according to an embodiment determined in the same way as for detecting the vehicle load of the loaded vehicle as described above.
According to an embodiment the system I comprises storage means 120 for storing the weight of the non-loaded vehicle so as to determine a load increase. Said storage means 120 may be any suitable storage means for storing data such as a computer, server unit or the like. Said storage means 120 may be arranged on board said vehicle. Said storage means 120 may be an external storage means wherein said system comprises means for extracting data representing weight of the non-loaded vehicle from such an external storage means. Said storage means 120 may be comprised in said control arrangement 100.
The means 114 for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load comprises according to an embodiment calculation means for subtracting the weight of the non-loaded vehicle from the weight of the loaded vehicle. The means 114 for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load may comprise any suitable computer, control unit, processor or the like. The means 114 for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load is according to an embodiment comprised in the control arrangement 100.
Said means 110 for determining the CO2level in the interior space of said vehicle comprises transferring means 116 for transferring said vehicle load increase to estimated number of persons.
Said means 110 for determining the CO2level in the interior space of said vehicle comprises CO2determination means 118 for determining a CO2level based on the thus estimated number of persons.
According to an embodiment of the system I said CO2determination means 118 for determining a CO2level based on the thus estimated number of persons is based on a predetermined interior space volume of said vehicle.
Said predetermined interior space volume of said vehicle is the empty space volume of the interior of said vehicle. Said predetermined interior space volume of said vehicle may be determined in any suitable way such as by measuring the volume, detecting the volume or the like.
According to an embodiment the system I comprises storage means 130 for storing predetermined interior space volume of said vehicle. Said storage means 130 may be comprised in or comprise said storage means 120. Said storage means 130 may be comprised in said control arrangement 100. Said storage means 120 may be any suitable storage means for storing data such as a computer, server unit or the like. Said storage means 130 may be arranged on board said vehicle. Said storage means 130 may be an external storage means wherein said system comprises means for extracting data representing predetermined interior space volume of said vehicle from such an external storage means. Said storage means 130 may be comprised in said control arrangement 100.
According to an embodiment the system comprises estimation means 140 for estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons.
The system I comprises means for estimating volume of said estimated number of persons. The means for estimating volume of said estimated number of persons is according to an embodiment arranged to estimate said volume based on an estimated average weight of said estimated number of persons.
Said estimation means 140 for estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons is arranged to subtract said estimated volume of said estimated number of persons from said predetermined interior space volume of said vehicle.
According to an embodiment of the system I the transferring means 116 for transferring said vehicle load increase to an estimated number of persons comprises weight estimation means 116a for estimating an average weight for a person.
According to an embodiment of the system I the CO2determination means 118 for determining a CO2level based on the thus estimated number of persons comprises estimation means 118a for estimating an average CO2production of such a person.
According to an embodiment the system comprises mode selection means 150 for selecting a mode characterising a certain population of persons prior to transferring said vehicle load increase to an estimated number of persons.
Said modes characterising a certain population of persons may be any suitable modes characterising a certain population of persons taking any suitable characteristics into consideration, such as gender, age, length, weight. Said modes characterising a certain population of persons may take type of vehicle, type of trip, configuration of passengers, etc. into consideration.
Said modes characterising a certain population of persons comprises according to an embodiment an adult mode corresponding to an adult population, a children mode corresponding to a children population, and a mixed mode corresponding to a mixture of adults and children.
Said mode selection means 150 comprises according to an embodiment an actuator member. Said actuator member may comprise any suitable actuator member for selecting a mode characterising a certain population of persons. Said actuator member may comprise a switch, a touch screen or the like. Said actuator member is according to an embodiment configured to be operable by the driver of the vehicle. Hereby the driver may select a certain mode based on the character of the population of persons on board the vehicle.
Said mode selection means 150 is according to an embodiment arranged to automatically select a mode based on a determined characteristics of the population of persons on board said vehicle.
The system I comprises according to an embodiment detecting means 160 for detecting characteristics of population of persons on board said vehicle/entering said vehicle.
Said detecting means may be any suitable detection means and may be arranged to detect one or more of: gender, age, length, weight The system I comprises means 170 for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level.
The means 170 for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level comprises according to an embodiment means for controlling one or more regulators, e.g. flaps, for regulating the amount of air being allowed to be introduced into said vehicle and for controlling a mixture of re-circulation of inside air and fresh outdoor air. Said means for controlling one or more regulators, e.g. flaps, comprises controlling degrees of opening of said one or more regulators, e.g. flaps.
The means 170 for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level comprises according to an embodiment means for controlling one or more fan member for regulating the air flow into said vehicle interior space.
The means 170 for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level is according to an embodiment comprised in the heating, ventilation and air conditioning (HVAC) system of the vehicle.
The control arrangement 100 is operably connected to the means 110 for determining the CO2level in the interior space of said vehicle via a link 10. The control arrangement 100 is via the link 10 arranged to receive a signal from said means 110 representing data for determined CO2level in the interior space of said vehicle.
The control arrangement 100 is operably connected to the means 112 for detecting vehicle load via a link 12. The control arrangement 100 is via the link 12 arranged to receive a signal from said means 112 representing data for detected vehicle load.
The control arrangement 100 is operably connected to the means 114 for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase via a link 14a. The control arrangement 100 is via the link 14a arranged to send a signal to said means 114 representing data for detected vehicle load.
The control arrangement 100 is operably connected to the means 114 for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase via a link 14b. The control arrangement 100 is via the link 14b arranged to send a signal to said means 114 representing data for weight of a non-loaded vehicle.
The control arrangement 100 is operably connected to the means 114 for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase via a link 14c. The control arrangement 100 is via the link 14c arranged to receive a signal from said means 114 representing data for determined load increase.
The control arrangement 100 is operably connected to the transferring means 116 for transferring said vehicle load increase to estimated number of persons via a link 16a. The control arrangement 100 is via the link 16a arranged to send a signal to said means 116 representing data for determined load increase.
The control arrangement 100 is operably connected to the transferring means 116 for transferring said vehicle load increase to estimated number of persons via a link 16b. The control arrangement 100 is via the link 16b arranged to receive a signal from said means 116 representing data for estimated number of persons. Said data comprises according to an embodiment data representing average weight for said persons.
The control arrangement 100 is operably connected to the CO2determination means 118 for determining a CO2level based on the thus estimated number of persons via a link 18a. The control arrangement 100 is via the link 18a arranged to send a signal to said means 118 representing data for estimated number of persons, said data according to an embodiment comprising average weight for said persons.
The control arrangement 100 is operably connected to the CO2determination means 118 for determining a CO2level based on the thus estimated number of persons via a link 18b. The control arrangement 100 is via the link 18b arranged to receive a signal from said means 118 representing data for determined CO2level. Said data comprises according to an embodiment an average CO2production of such a person.
The control arrangement 100 is operably connected to the storage means 120 for storing the weight of the non-loaded vehicle via a link 20. The control arrangement 100 is via the link 20 arranged to receive a signal from said means 120 representing data for weight of the non-loaded vehicle.
The control arrangement 100 is operably connected to the means 130 for storing predetermined interior space volume of said vehicle via a link 30. The control arrangement 100 is via the link 30 arranged to receive a signal from said means 130 representing data for predetermined interior space volume of said vehicle.
The control arrangement 100 is operably connected to the means 140 for estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons via a link 40a. The control arrangement 100 is via the link 40a arranged to send a signal to said means 140 representing data for predetermined interior space volume of said vehicle.
The control arrangement 100 is operably connected to the means 140 for estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons via a link 40b. The control arrangement 100 is via the link 40b arranged to send a signal to said means 140 representing data for estimated volume of said estimated number of persons.
The control arrangement 100 is operably connected to the means 140 for estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons via a link 40c. The control arrangement 100 is via the link 40c arranged to receive a signal from said means 140 representing data for actual interior space volume of said vehicle.
The control arrangement 100 is operably connected to the mode selection means 150 for selecting a mode characterising a certain population of persons prior to transferring said vehicle load increase to an estimated number of persons via a link 50a. The control arrangement 100 is via the link 50a arranged to send a signal to said means 150 representing data for characteristics of population of persons on board said vehicle.
The control arrangement 100 is operably connected to the mode selection means 150 for selecting a mode characterising a certain population of persons prior to transferring said vehicle load increase to an estimated number of persons via a link 50b. The control arrangement 100 is via the link 50b arranged to receive a signal from said means 150 representing data for selected mode characterising a certain population of persons.
The control arrangement 100 is operably connected to the means 160 for detecting characteristics of population of persons on board said vehicle/entering said vehicle via a link 60. The control arrangement 100 is via the link 60 arranged to receive a signal from said means 160 representing data for characteristics of population of persons on board said vehicle.
The control arrangement 100 is operably connected to the means 170 for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level via a link 70. The control arrangement 100 is via the link 70 arranged to send a signal to said means 170 representing data for determined CO2level in the interior space of said vehicle.
The system I for regulating the air composition in the interior space of a vehicle is according to an embodiment adapted to perform the method described below with reference to fig. 4.
Fig. 4 schematically illustrates a block diagram of a method for regulating the air composition in the interior space of a vehicle according to an embodiment of the present invention.
According to the embodiment the method for regulating the air composition in the interior space of a vehicle comprises a step S1a. In this step the vehicle load is detected. The vehicle load is arranged to be detected by means of vehicle load detection means.
According to the embodiment the method for regulating the air composition in the interior space of a vehicle comprises a step S1 b. In this step said detected vehicle load is compared to a non-loaded vehicle so as to determine a load increase.
According to the embodiment the method for regulating the air composition in the interior space of a vehicle comprises a step S1c. In this step said vehicle load increase is transferred to an estimated number of persons.
According to the embodiment the method for regulating the air composition in the interior space of a vehicle comprises a step S1d. In this step CO2level is determined based on the thus estimated number of persons.
According to the embodiment the method for regulating the air composition in the interior space of a vehicle comprises a step S2. In this step fresh air supply to the interior space of the vehicle is adapted based on said determined CO2level.
Said vehicle load detection means may comprise one or more load detection sensors. Said vehicle load detection means may comprise one or more load detection sensors arranged in connection to the chassis of said vehicle. Said vehicle load detection means may comprise one or more load detection sensors arranged in connection to the wheel axles of the chassis of said vehicle. Said vehicle load detection means may comprise one or more load detection sensors arranged in connection to comprised in bellows of a vehicle having a suspension system with a bellows configuration comprising a set of bellows arranged in connection to the respective axles of the chassis of the vehicle.
The step of comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase comprises according to an embodiment the step of subtracting the load of the vehicle, i.e. the weight of the vehicle, from the non-loaded vehicle, i.e. from the weight of the vehicle when there is no additional load comprising additional load of persons. Thus said additional load in a loaded vehicle is assumed to correspond to additional persons having entered and being present in the vehicle.
The weight of a non-loaded vehicle may be determined in any suitable way by means of any suitable means such as any suitable weight detector or the like.
The step of comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase may be performed by any suitable means for comparing said detected vehicle load to a non-loaded vehicle. Said means for comparing said detected vehicle load to a non-loaded vehicle comprises according to an embodiment calculation means for subtracting the weight of the non-loaded vehicle from the weight of the loaded vehicle. The means for comparing said detected vehicle load to a non-loaded may comprise any suitable computer, control unit, processor or the like.
According to an embodiment of the method the step of determining a CO2level based on the thus estimated number of persons is based on a predetermined interior space volume of said vehicle.
According to an embodiment the method comprises the step of estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons.
According to an embodiment of the method the steps of transferring said vehicle load increase to an estimated number of persons and determining a CO2level based on the thus estimated number of persons comprises the step of estimating an average weight for a person as well as an average CO2production of such a person.
According to an embodiment the method comprises the step of, prior to transferring said vehicle load increase to an estimated number of persons, selecting a mode characterising a certain population of persons by mode selection means.
The step of selecting a mode characterising a certain population of persons by mode selection means may according to an embodiment be performed by the driver of the vehicle, said driver of the vehicle operating said mode selection means.
Said mode selection means comprises according to an embodiment an actuator member. Said actuator member may comprise any suitable actuator member for selecting a mode characterising a certain population of persons. Said actuator member may comprise a switch, a touch screen or the like. Said actuator member is according to an embodiment configured to be operable by the driver of the vehicle. Hereby the driver may select a certain mode based on the character of the population of persons on board the vehicle.
Said mode selection means is according to an embodiment arranged to automatically select a mode based on a determined characteristics of the population of persons on board said vehicle.
The method comprises according to an embodiment the step of detecting, by detecting means, characteristics of population of persons on board said vehicle/entering said vehicle.
Said detecting means may be any suitable detection means and may be arranged to detect one or more of: gender, age, length, weight The method for regulating the air composition in the interior space of a vehicle is according to an embodiment adapted to be performed by the system described above with reference to fig. 3.
With reference to figure 5, a diagram of an apparatus 500 is shown. The control arrangement 100 described with reference to fig. 3 may according to an embodiment comprise apparatus 500. Apparatus 500 comprises a non-volatile memory 520, a data processing device 510 and a read/write memory 550. Non-volatile memory 520 has a first memory portion 530 wherein a computer program, such as an operating system, is stored for controlling the function of apparatus 500. Further, apparatus 500 comprises a bus controller, a serial communication port, l/O-means, an A/D-converter, a time date entry and transmission unit, an event counter and an interrupt controller (not shown). Non-volatile memory 520 also has a second memory portion 540.
A computer program P is provided comprising routines for regulating the air composition in the interior space of a vehicle. The program P comprises routines for determining the CO2level in the interior space of said vehicle. The routines for determining the CO2level in the interior space of said vehicle comprises routines for detecting vehicle load by means of vehicle load detection means. The routines for determining the CO2level in the interior space of said vehicle comprises routines for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase. The routines for determining the CO2level in the interior space of said vehicle comprises routines for transferring said vehicle load increase to estimated number of persons. The routines for determining the CO2level in the interior space of said vehicle comprises routines for determining a CO2level based on the thus estimated number of persons. The routines for determining a CO2level based on the thus estimated number of persons is based on a predetermined interior space volume of said vehicle. The program P comprises routines for estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons. The routines for of transferring said vehicle load increase to an estimated number of persons and determining a CO2level based on the thus estimated number of persons comprises routines for estimating an average weight for a person as well as an average CO2production of such a person. The program P comprises routines for, prior to transferring said vehicle load increase to an estimated number of persons, selecting a mode characterising a certain population of persons by mode selection means. The computer program P may be stored in an executable manner or in a compressed condition in a separate memory 560 and/or in read/write memory 550.
When it is stated that data processing device 510 performs a certain function it should be understood that data processing device 510 performs a certain part of the program which is stored in separate memory 560, or a certain part of the program which is stored in read/write memory 550.
Data processing device 510 may communicate with a data communications port 599 by means of a data bus 515. Non-volatile memory 520 is adapted for communication with data processing device 510 via a data bus 512. Separate memory 560 is adapted for communication with data processing device 510 via a data bus 511. Read/write memory 550 is adapted for communication with data processing device 510 via a data bus 514. To the data communications port 599 e.g. the links connected to the control units 100 may be connected.
When data is received on data port 599 it is temporarily stored in second memory portion 540. When the received input data has been temporarily stored, data processing device 510 is set up to perform execution of code in a manner described above. The signals received on data port 599 can be used by apparatus 500 for determining the CO2level in the interior space of said vehicle. The signals used by apparatus 500 for determining the CO2level in the interior space of said vehicle comprises signals used for detecting vehicle load by means of vehicle load detection means. The used by apparatus 500 for determining the CO2level in the interior space of said vehicle comprises signals used for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase. The signals used by apparatus 500 for determining the CO2level in the interior space of said vehicle comprises signals used for transferring said vehicle load increase to estimated number of persons. The signals used by apparatus 500 for determining the CO2level in the interior space of said vehicle comprises signals used for determining a CO2level based on the thus estimated number of persons. The signals used for determining a CO2level based on the thus estimated number of persons is based on a predetermined interior space volume of said vehicle. The signals received on data port 599 can be used by apparatus 500 for estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons. The signals used by apparatus 500 for determining a CO2level based on the thus estimated number of persons comprises signals used for estimating an average weight for a person as well as an average CO2production of such a person. The signals received on data port 599 can be used by apparatus 500 for selecting a mode characterising a certain population of persons by mode selection means prior to transferring said vehicle load increase to an estimated number of persons.
Parts of the methods described herein can be performed by apparatus 500 by means of data processing device 510 running the program stored in separate memory 560 or read/write memory 550. When apparatus 500 runs the program, parts of the methods described herein are executed.
The foregoing description of the preferred embodiments of the present invention has been provided for the purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations will be apparent to practitioners skilled in the art. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to understand the invention for various embodiments and with the various modifications as are suited to the particular use contemplated.
Claims (13)
1. A method for regulating the air composition in the interior space of a vehicle (V), said method comprising the steps of: determining (S1 ) the CO2level in the interior space of said vehicle; and adapting (S2) fresh air supply to the interior space of the vehicle based on said determined CO2level, characterized in that the step of determining (S1) the CO2level in the interior space of said vehicle comprises the steps of: detecting (S1a) vehicle load by means of vehicle load detection means (112); comparing (S1b) said detected vehicle load to a non-loaded vehicle so as to determine a load increase; transferring (S1c) said vehicle load increase to estimated number of persons; and determining (S1d) a CO2level based on the thus estimated number of persons.
2. A method according to claim 1, wherein the step of determining a CO2level based on the thus estimated number of persons is based on a predetermined interior space volume of said vehicle.
3. A method according to claim 1 or 2, comprising the step of estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons.
4. A method according to any of claims 1 -3, wherein the steps of transferring said vehicle load increase to an estimated number of persons and determining a CO2level based on the thus estimated number of persons comprises the step of estimating an average weight for a person as well as an average CO2production of such a person.
5. A method according to any of claims 1-4, comprising the step of, prior to transferring said vehicle load increase to an estimated number of persons, selecting a mode characterising a certain population of persons by mode selection means.
6. A system (I) for regulating the air composition in the interior space of a vehicle (V), said system comprising means (110) for determining the CO2level in the interior space of said vehicle; and means (170) for adapting fresh air supply to the interior space of the vehicle based on said determined CO2level, characterized in that said means (110) for determining the CO2level in the interior space of said vehicle comprises: vehicle load detection means (112) for detecting vehicle load; comparison means (114) for comparing said detected vehicle load to a non-loaded vehicle so as to determine a load increase; transferring means (116) for transferring said vehicle load increase to estimated number of persons; and CO2determination means (118) for determining a CO2level based on the thus estimated number of persons.
7. A system according to claim 6, wherein said CO2determination means (118) for determining a CO2level based on the thus estimated number of persons is based on a predetermined interior space volume of said vehicle.
8. A system according to claim 6 or 7, comprising estimation means (140) for estimating the actual interior space volume based on said predetermined interior space volume and an estimated volume of said estimated number of persons.
9. A system according to any of claims 6-8, wherein the transferring means (116) for transferring said vehicle load increase to an estimated number of persons comprises estimation means (116a) for estimating an average weight for a person, wherein the CO2determination means (118) for determining a CO2level based on the thus estimated number of persons comprises CO2estimation means (118a) for estimating an average CO2production of such a person.
10. A system according to claim 1, comprising mode selection means (150) for selecting a mode characterising a certain population of persons prior to transferring said vehicle load increase to an estimated number of persons.
11. A vehicle (V) comprising a system (I) according to any of claims 6-10.
12. A computer program (P) or regulating the air composition in the interior space of a vehicle (V) during drive of the vehicle, said computer program (P) comprising program code which, when run on an control arrangement (100) or another computer (500) connected to the control arrangement (100), causes the control arrangement to perform the steps according to claim 1 -5.
13. A computer readable medium comprising instructions which, when executed by a computer, cause the computer to carry out the method according to any of claims 1 -5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1751429A SE541531C2 (en) | 2017-11-21 | 2017-11-21 | Method and system for regulating the air composition in the interior space of a vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1751429A SE541531C2 (en) | 2017-11-21 | 2017-11-21 | Method and system for regulating the air composition in the interior space of a vehicle |
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| Publication Number | Publication Date |
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| SE1751429A1 SE1751429A1 (en) | 2019-05-22 |
| SE541531C2 true SE541531C2 (en) | 2019-10-29 |
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| SE1751429A SE541531C2 (en) | 2017-11-21 | 2017-11-21 | Method and system for regulating the air composition in the interior space of a vehicle |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE460036B (en) * | 1988-01-22 | 1989-09-04 | Vts Transportation Systems Ab | DEVICE FOR AIR CONDITIONING CONTROL IN A VEHICLE |
| DE10009540C2 (en) * | 2000-02-29 | 2001-12-13 | Siemens Ag | Method and device for determining the position and / or the weight of a mass body located in a motor vehicle, in particular a person located on a vehicle seat |
| US6454178B1 (en) * | 2001-05-24 | 2002-09-24 | Ford Global Technologies, Inc. | Adaptive controller for an automotive HVAC system |
| DE102006003071A1 (en) * | 2006-01-20 | 2007-08-02 | Siemens Ag | Composition regulating method e.g. for motor vehicle interior space, involves regulating air composition based on fresh air supply initially being measured by means of operating parameters of air supply of motor vehicle |
| US7788063B2 (en) * | 2008-01-28 | 2010-08-31 | International Business Machines Corporation | Utilizing gross vehicle weight to determine passenger numbers |
| DE102011121871B3 (en) * | 2011-12-21 | 2012-10-25 | Audi Ag | Method for determining occupant weight of motor car, involves detecting two times as two values of force acting on carriage load and suspension load, and detecting difference between two values to obtain occupant weight of vehicle |
| WO2014002137A1 (en) * | 2012-06-27 | 2014-01-03 | 三菱電機株式会社 | Railway-vehicle total-heat-exchange ventilation system |
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2017
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