CN102996208B - Particulate filter regeneration control system and method - Google Patents

Abstract

Systems and methods for controlling regeneration of a diesel particulate filter in a vehicle engine exhaust include detecting a distance of an object from the exhaust and controlling a regeneration event if the distance is less than a threshold value. The system and method may include a particulate filter disposed in the exhaust of the vehicle and a proximity sensor disposed adjacent an exhaust opening and positioned to detect presence of an object near the opening. A controller in communication with the proximity sensor is adapted for controlling regeneration of the particulate filter in response to the proximity sensor detecting the object near the opening.

Description

Particulate filter regeneration control system and method

【Technical field】

The present invention relates to particulate filter regeneration.

【Background technology】

The accessory substance of fuel combustion, especially diesel combustion is carbon granule, and it is referred to as soot.Abgasgesetz is limited to be sent out Motivation can be emitted into the amount of the soot in environment and particulate.

Emission control system, such as particulate filter, the soot row from engine is reduced by catching soot particle Put.As particulate filter becomes soot saturation, filter can be regenerated, to reduce the amount of the particle matter of trapping and recover The performance of filter.Generally, by the temperature of liter high-pass filter to predeterminated level with the particle matter of the accumulation that aoxidizes or burn Complete regeneration.

Can be with to increase delivery temperature by entering exhaust stream or changing the operating of engine extra fuel injection Complete regeneration.Typically, filter regeneration can be performed during normal driving situation and drivability is not interfered with and is caused Driver not may be aware of when to have occurred and that regeneration.However, multiple applications can also include operator's instruction regeneration, for example, It is during vehicle maintenance or for example cross-country with Construction traffic for including industry（off-road）Vehicle.

【The content of the invention】

The invention provides it is a kind of for control vehicle motor exhaust in diesel particulate filter regeneration system and Method.In one embodiment, system and method include detection from the distance for being vented to object and if the distance is less than threshold Value then controls regeneration event.In another embodiment, system and method include the particulate filter being arranged in the exhaust of vehicle Be arranged on being provided near exhaust port detect be close to opening object appearance be close to（proximity）Sensing Device.The controller communicated with proximity transducer is adapted to respond to detect the object of close opening and control micro- in proximity transducer The regeneration of grain filter.

According to another embodiment, system and method are included if the distance detected by proximity transducer is less than threshold value eventually Only regeneration event.In a further embodiment, if system and method include that the distance detected by proximity transducer is less than Threshold value then prevents to initiate regeneration event.In another embodiment, system and method are included if the distance is less than threshold value to behaviour Author shows message.

Embodiments in accordance with the present invention can provide multiple advantages.For example, it is of the invention control dpf regeneration system and The heat that method discharges during regeneration has been reduced or eliminated negatively affects the possibility of any object or person near vehicle exhaust Property.Using be also used as parking and/or car backing operation existing vehicle proximity transducer provide extra function and not The extra vehicle hardware of needs and the cost and complexity for associating.

Accompanying drawing is combined from the representative embodiment being detailed below, above-mentioned advantage and other advantages and feature will become Become apparent from.

【Description of the drawings】

Fig. 1 is to be used to control explosive motor and gas extraction system or method according to the explanation of one embodiment of the present of invention The block diagram of operating.

Fig. 2 shows the vehicle including the engine according to Fig. 1 and gas extraction system.

Fig. 3 be illustrate according to one embodiment of present invention in for controlling the system or method of particulate filter regeneration The flow chart of operation.

【Specific embodiment】

Here discloses concrete representative embodiment；It is understood, however, that embodiments of the disclosure only can be with various The example implemented with alternative form.Accompanying drawing has not necessarily been drawn to scale, and can expand or shrink some features to show The details of particular elements.Therefore, the concrete structure and function detail that here is disclosed should not be construed as restriction, and as just being used for Teaching those skilled in that art are in many ways using the representative basis of claim feature.Such as ordinary skill in the art Personnel will be understood that, with reference to any Description of Drawings and multiple features of the invention of explanation can with one or more other Embodiments of the invention of the combinations of features illustrated in accompanying drawing to be produced without clearly stating or describing.The combination of the feature of explanation There is provided the representative embodiment of typical application.However, for application-specific or enforcement, can with it is of the invention instruct into The change of row multiple combination and feature.

Fig. 1 illustrates the schematic diagram of a cylinder for showing multicylinder engine 10, and it can be included in the propulsion system of vehicle In system, for example, motor vehicle, truck, static state or mobile construction or industrial vehicle.Those skilled in that art will recognize that and take Certainly the multiple parts in certain types of engine and/or application-specific engine 10 can change.Engine 10 is overall to be represented The compression ignition engine of power is provided by diesel oil.However, multiple features of the present invention be also applicable to for example by gasoline, Gaseous fuel provides the spark ignition engine or dual fuel engine of power.

Can at least partially by including controller 12 control system and by via input equipment 16 from car The input of operator 14 and control engine 10.In this example, input equipment 16 includes accelerator pedal and for producing into The pedal position sensor 18 of the pedal position signal PP of ratio.Other input equipments can also be used.For example, in construction or work In industry application, input equipment 16 can be performed by dialing, knob, action bars, digital control etc..The combustion chamber of engine 10 or Person's cylinder 30 may include chamber wall 32 and position piston 36 in the inner.Piston 36 can be connected to bent axle 40 so that piston it is past Multiple motion is converted to the rotary motion of bent axle.Bent axle 40 can be via at least one driving wheel phase of intermediate transmission system and vehicle Even.Further, starter motor can be connected to start the starting operation of engine 10 via flywheel with bent axle 40.

Cylinder 30 can receive air inlet and discharge via exhaust passage 48 and fire via the inlet channel 42 in inlet manifold 44 Burn gas.Inlet manifold 44 and exhaust passage 48 can via respective inlet valve 46 and exhaust valve 50 optionally with cylinder 30 Connection.In certain embodiments, cylinder 30 may include two or more inlet valves and/or two or more exhaust valves.Fuel sprays Emitter 52 is shown as being connected directly to cylinder 30 for direct fuel injection into cylinder 30.Fuel injector 52 spray with from The proportional fuel of the FPW signal pulse widths of controller 12.So, in the way of fuel injector 52 is to be known as directly injection Fuel is provided and enters cylinder 30.The side that fuel injector 52 can be for example along cylinder 30 or the top in cylinder are installed.

Fuel can be by including the fuel system of fuel tank, petrolift and fuel rail（Do not show）It is delivered to combustion Material ejector 52.In certain embodiments, fuel injector 52 is arranged on the construction of air intake duct 42 and allows to be known as air inlet The mode of road injection is provided in the air intake duct of fuel to the upstream of cylinder 30.While figure 1 show that the only one in multicylinder engine Cylinder, each cylinder can be similarly included its respective one group of air inlet/exhaust valve, fuel injector, spark plug etc..

Air intake duct 42 may include the air throttle 62 with choke block 64.In this particular, controller can be passed through 12 change the position of choke block 64 via offer to the signal of electro-motor or the actuator being included in air throttle 62, the structure Make commonly known as Electronic Throttle Control（ETC）.As such, it is possible to operate air throttle 62 with change provide to cylinder 30 and its The air inlet of his cylinder.The position of choke block 64 can be provided to controller 12 by throttle position signal TP.Air intake duct 42 May include Mass Air Flow（MAF）Sensor 60 and Manifold Air Pressure（MAP）Sensor 66 is used to provide signal extremely respectively Controller 12.Numerous embodiments can be used in combination or substitute solar term using other air-flow control devices with air throttle 62 Door 62.For example, the application of the air inlet/exhaust valve 46,50 with Electromagnetic Drive can utilize valve timing to control inlet air stream. Some compression ignition engines, particularly those do not use the engine of exhaust gas recirculatioon can not include air throttle 62.

Controller 12 can receive multiple signals from the sensor for being connected to engine 10.In addition to aforementioned signal, control Device processed can also receive the engine coolant temperature measured from the temperature sensor 54 for being connected to cooling cover 56（ECT）'s Signal；From the PIP Profile Igntion PickUp of the hall effect sensor 58 or other suitable sensors for being connected to bent axle 40 （PIP）Signal；From the throttle position of TPS（TP）.Can be produced according to PIP signals by controller 12 Raw engine rotational speed signal, RPM.Can be used to provide the vacuum in inlet manifold from the manifold pressure of manifold pressure sensor 66 Or the instruction of pressure.It is noted that using the multiple combination of the sensor, for example, using maf sensor 60 MAP is not used Sensor 66, or vice versa it is as the same.During stoichiometric proportion operates, MAP sensor 66 can provide the instruction of engine torque. Further, MAP sensor 66 with detection engine speed together with can provide introduce cylinder 30 inflation include air Estimation.In one example, sensor 58, it is also used as engine speed sensor, can every time rotate in bent axle 40 When produce predetermined number equispaced pulse.

The cylinder 30 of engine 10 or one or more other cylinders can operate in compression ignition pattern, by or Person is not by via related spark plug（Do not show）The pilot spark of offer.Further, engine 10 can by along Inlet manifold 44 arrange compressor reducer 70 and along the upstream of exhaust after treatment system 80 exhaust duct 48 arrange turbine 72 and Turbocharging.

Exhaust sensor 74 is shown connected to the exhaust duct 48 of the upstream of exhaust after treatment system 80.Exhaust sensor 74 can With for for providing any suitable sensor of the instruction of exhaust air-fuel ratio, such as linear oxygen sensors or UEGO（It is general or Wide area is vented oxygen）Sensor, bifurcation lambda sensor or exhaust oxygen（EGO）Sensor, HEGO（Hot type EGO）, nitrogen oxides, carbon Hydrogen compound or carbon monoxide transducer.Exhaust gas recirculatioon（EGR）System 76 can be connected to exhaust duct 48.Egr system can be wrapped The cooler for recycled exhaust gas 78 for including EGR valve 77 and arranging along EGR conduit 79.

Exhaust after treatment system 80 may include multiple emission control equipments, in selected situation（Such as selected temperature）Period, Wherein each emission control equipment can occur exothermic reaction with the unnecessary oxygen of appearance in exhaust.For example, exhaust after treatment system 80 may include the diesel oxidation catalyst along the setting of discharge duct 48 in the downstream of turbine 72（DOC）82.Can be along under DOC82 The discharge duct 48 of trip arranges SCR（SCR）Catalyst 84.Selective catalytic reduction process can be arranged using diesel oil Gas fluid ejector 85.Diesel exhaust gas fluid ejector 85 can be urea injector, or any suitable ammonia source.Diesel oil is arranged Gas fluid ejector 85 can be arranged on the upstream of SCR catalyst 84 and DOC82 downstreams.

Exhaust after treatment system 80 also includes diesel particulate filter（DPF）86.Can be along the downstream of SCR catalyst 84 Discharge duct 48 arranges the DPF.Upstream along each after-treatment device of the discharge duct 48 in after-treatment system 80 is with Pressure and/or temperature sensor 88,90,92 and 94 can be set at the point of trip.Further, oxygen sensor 96, for example UEGO sensor can be arranged on the downstream of exhaust after treatment system 80.It is also contemplated that in gasoline application exhaust aftertreatment system System may include particulate filter, such as gas particulate filter units（GPF）.

DPF86 can be made of a variety of materials, including cordierite（cordierite）, carborundum and other high-temperature oxydations Thing ceramics.According to the present invention, once the soot accumulation in DPF86 has reached predeterminated level, can automatically initiate and control The regeneration of DPF86.Alternately, the request such as associated operator's prompting, message, light can be passed through（Initiated by operator 's）Dpf regeneration is advising manually or the dpf regeneration initiated of operator.Similarly, can manually initiate during vehicle maintenance Dpf regeneration.Can pass through（Such as pressure and/or temperature sensor 88,90,92 and 94 two ends）In pressure drop identification DPF86 Soot accumulation.

It should be appreciated that exhaust after treatment system 80 can include multiple equipment for after-treatment configurations not shown in FIG. In one example, exhaust after treatment system 80 can only include DOC82.In another example, exhaust after treatment system 80 can be wrapped Include DOC82 and DPF86 downstream.In another example, exhaust after treatment system 80 may include DOC82 and downstream DPF86, and subsequent SCR catalyst 84.In another example, lean nitrogen oxide trap can be used（LNT）In replacing Fig. 1 The SCR catalyst 84 of display.Additionally, the order of the different catalysts of exhaust after treatment system 80 and filter can also change. According to application, the pressure arranged in exhaust after treatment system 80 and/or the number of temperature sensor can also change.Although oxygen Sensor 96 is illustrated within FIG the position in the downstream of exhaust aftertreatment equipment, and it may be located at exhaust after treatment system The upstream of the arbitrary equipment in 80, in this case, it can only monitor the upstream catalyst of lambda sensor 96.It is also contemplated that In gasoline application, exhaust after treatment system can include three-way catalyst（TWC）Or other suitable catalyst substitute DOC And GPF substitutes DPF.

Heating DPF86 can be passed through extremely will be with the temperature of speed burning soot particle more faster than new soot particle deposition （Such as 400-600 degree Celsius）And complete the regeneration of DPF86.In one example, DPF86 can be comprising noble metal（For example Platinum）Washcoat layer catalysis particulate filter reducing soot combustion temperature and simultaneously by hydrocarbon and carbon monoxide It is oxidized to carbon dioxide and water.

In another embodiment, for regeneration purposes injector 87 can be used for from fuel tank or from storage container Conveying fuel is used to heat DPF86 to gas extraction system to produce heat.Injector 87 may be located at the upstream of DOC82.Additionally, Can be used for being lifted delivery temperature for regenerating by the later fuel injection of injector 52 during the exhaust stroke of piston 36 Purpose.

Alternately, in order to regenerate DPF86, regeneration injection strategy can be performed.Regeneration injection strategy can perform injection Model, the jet model may include that multiple injection events are for example pre-（pilot）Fuel injection, main fuel injection, nearly late fuel Injection, and/or remote late fuel injection.It should be appreciated that in other embodiments foregoing fuel injection may include multiple fuel thing Part.Therefore, DPF86 can be regenerated during the operating of engine 10.For example, can be controlled by adjusting the amount of multi-injection The temperature of DOC82 downstreams and DPF86 upstreams to desired value to promote DPF86 in particle matter burning.In this example, The downstream of DOC82 and the temperature set points of DPF86 upstreams can be set up to promote the regeneration of DPF86.

Controller 12 in Fig. 1 can be microcomputer, and it can also be referred to as CPU（CPU）, it includes Microprocessor unit, input/output end port and for executable program and the electronic storage medium of calibration value.Computer-readable Storage medium may include impermanency and permanent memory, such as read-only storage（ROM）, random access memory（RAM）, and Do not fail（keep alive）Memory（KAM）.KAM can be used for storing various performance variables or control system when CPU power-off System parameter value.Computer-readable recording medium can be implemented using any number of known as memory device.These storage devices can Think such as PROM（Programmable read only memory）、EPROM（Electronics PROM）、EEPROM（Electric erasable PROM）, flash memory or The data-storable storage device of other electricity, magnetic, light or its combination, some in these data represent controller 12 Use to control engine or be equipped with the vehicle of engine and for performing car to various engines/vehicle characteristics Carry diagnosis（OBD）The executable instruction or coding of monitoring.Computer-readable recording medium can also include floppy disk, CD-ROM, firmly Disk etc..

Controller 12 can be via input/output（I/O）Interface communicates with various engines/vehicle sensors and actuator, The interface may be embodied as single integrated interface, there is provided multiple initial data or signal adjustment, process and/or conversion, short circuit Protection etc..Alternately, it is possible to use one or more specialized hardwares or firmware chip are with the tune before controller 12 is supplied to Whole and process signal specific.

Controller 12 can be communicating with meter panel of motor vehicle display 98.Instrument display 98 may be located at passenger compartment 102 It is interior with remind driver with regard to such as engine 10 or exhaust after treatment system 80 information on services.Enter one for Fig. 3 as follows What step was described in detail, controller 12 can monitor the parameter of at least one exhaust after treatment system 80 to determine the need for DPF again It is raw.Controller can use instrument display 98 to show the display information with regard to dpf regeneration to operator.Controller 12 includes control Logic processed is regenerated with detecting when DPF86 demands.The information can be communicated to into operator using instrument display 98.Depend on Application-specific and enforcement, instrument display 98 can also using touch screen, switch, button etc. provide user input ask manually or The dpf regeneration of operator-initiation.Controller 12 can be discussed more fully below with communicating with proximity transducer 110.Connect Nearly sensor 110 can be used for detecting the object in the preset distance of exhaust, and instrument display 98 is used for when dpf regeneration has Corresponding message is shown during contrary instruction.

With reference to Fig. 2, it is shown that vehicle 100 includes engine 10 and exhaust after treatment system 80.Vehicle 100 is included along car Rear board or rear portion 112 assembling proximity transducer 110.In one embodiment, as shown in Fig. 2 proximity transducer 110 On the bumper 114 of vehicle 100.In another embodiment, vehicle 100 may include many along the interval location of rear portion 112 The multiple proximity transducers 110 installed.By installing proximity transducer 110 along rear portion 112 or bumper 114, sensing is close to Device 110 may be mounted near close exhaust port or tail pipe 116.

In most vehicles, when vehicle just can occur in motion dpf regeneration during running well, because can hold Row delivery temperature and regeneration strategy without or hardly have the driving to vehicle and have an impact.However, some vehicles and driving The person of sailing never experiences the driving cycle for allowing automatic regeneration.For example, city race on and off duty and truck, it will not experience height Speed drives and/or with start-stop driving cycle, the delivery temperature for being sufficiently used for regenerating generally is not had, so as to need The regeneration that operator initiates.The delivery temperature improved during the regeneration that operator initiates after vehicle stops can be negatively affected Object near engine exhaust opening.Delivery temperature can be between 400 degree to 600 degree, and it can negatively affect people or thing The combustible object of body such as trees, building, garage door, fuel container or other close exhausts during regenerating.

Proximity transducer 110 can be used for the appearance of detecting object 120 and/or from tail pipe 116 to the distance of object to control The regeneration of DPF86 processed.Proximity transducer 110 is the sensor of the detectable distance from sensor to object.Proximity transducer 110 Can be any appropriate sensor, such as based on the proximity transducer of sonar, based on the proximity transducer of laser, based on ultrasound Proximity transducer or any other suitable appearance and/or distance for being used for detecting object sensor.Proximity transducer 110 Electric wire for electrically connecting proximity transducer 110 to controller 12 or alternately is may include, proximity transducer 110 can nothing Communicate with controller 12 line.Proximity transducer 110 can be the auxiliary sensing of parking existed in some Vehicular systems Device or car backing sensor.By using existing part, the dpf regeneration system reduces cost and vehicle complexity.Connect Nearly sensor 110 can also provide relative to require that operator monitors can not the distance of detecting object 120 automatically reversing shadow The advantage of picture.Furthermore, it is possible to including interval location arrange multiple proximity transducers 110 with provide for detection for example rear and Along the wide range of the object 120 of the side of vehicle 100.

In one embodiment, vehicle 100 includes being located near the exhaust port of tail pipe 116 and being provided for detection and open The distance " x " of the object 120 near mouthful and/or the proximity transducer 110 for occurring.The controller communicated with proximity transducer 110 12 are adapted for detecting the object 120 near opening and controlling the regeneration of particulate filter 86 in response to proximity transducer 110. In representative embodiment as shown in Figure 2, multiple proximity transducers 110 are adjacent to the exhaust port 116 of tail pipe and are arranged on vehicle On 100 bumper 114.

With reference now to Fig. 3, it is shown that illustrate for using proximity transducer 110 to control the operation of the system of dpf regeneration Simplified block diagram or flow chart.Regeneration event can be that operator initiates or automatically initiates under suitable vehicles situation.Such as this In field ordinarily skilled artisan will understand that, the function of being represented by flow chart can be performed by hardware and/or software.Depend on Particular procedure strategy, such as event-driven, interrupt driving etc., can be with different from the order being illustrated in Figure 3 or sequence execution The several functions.Similarly, although not clearly stating, one or more steps or function can be repeatedly carried out.Similarly, The step of in some applications or one or more explanations can be omitted in implementing or function.In one embodiment, the work(of explanation Mainly can be performed and by being based on by storage software instruction in a computer-readable storage medium, code or control logic The computer or controller of microprocessor（Such as controller 12（Fig. 1））Perform to control the operation of vehicle.

First, as frame 210 is represented, controller monitoring DPF situations.Can use it is various strategy determine DPF situations with And whether should regenerate DPF.In some instances, it is possible to use the threshold pressure differential at DPF two ends determines the situation of DPF and is It is no to regenerate DPF.However, in other examples, the hourage that operated based on vehicle mileage or engine and whether car Travel beyond threshold distance or exceeded the threshold time period of engine operating and estimate the situation of DPF.Another In one example, as shown in figure 3, based on whether whether the particulate loading of storage determines the situation of DPF higher than max-thresholds and should Regeneration DPF.

As representated by frame 212, vehicular meter display or message center can be based on the situation of DPF to operator's exhibition Show information.Of course, it is possible to show similar information to operator using special light source or other service indicators. The particulate loading accumulated in DPF can be shown as percentage, wherein 100% indicates that DPF has expired and needed regeneration.It is alternative Ground, it is possible to use represent the percentage of the remaining DPF capacity of estimation.With the close respective thresholds of DPF, such as 100% particulate is born Lotus, the vehicular meter display as representated by frame 214 notifies that discharge filter is full to operator.Vehicular meter display may be used also To show message request operator input.Operator's input can include pressing button or switch or in vehicular meter display Upper pressing input is input into from other of operator, for example park and/or brake pedal, accelerator pedal etc. it is suitable Sequence.

Once controller receives operator's input, as representated by frame 216, controller checks car using proximity transducer Around.Controller determines whether there is any object in the threshold distance of vehicle.If detected in vehicle threshold distance Any object, the vehicular meter display as representated by frame 220 shows that suitable information indicates to have already prevented from regeneration to operator. In one embodiment, threshold distance can be the fixed range for preventing to regenerate in the range of it.In another embodiment, threshold value Distance can be depending on various situations（The type of the object for for example being detected by proximity transducer）Variable range.For example, such as Fruit proximity transducer detects metal object, if threshold distance can less than proximity transducer detect object such as people or The threshold distance of tree.Threshold distance might also depend on the delivery temperature of detection and change.If delivery temperature is relatively low, threshold value away from From can be shorter.Alternatively, sensor only the appearance of detecting object and can indicate whether object in the ranges of sensors Yes/No signal, wherein ranges of sensors（range）It can be threshold distance.Depending on application, threshold distance can be for for example One meter to five meters.Certainly, depending on exhaust gas conditions it is expected that other threshold distances.

If controller does not detect any object, as representated by frame 222, vehicle instrument in the threshold distance of vehicle Table display shows that message request operator confirms vehicle in suitable position to initiate regeneration to operator.Operator can be with Indicate that vehicle is in suitable position using foregoing operator input.When controller receives confirmation input, such as frame 223 Representative controller raises the temperature of the exhaust of offer to DPF using foregoing strategy to initiate dpf regeneration.Such as frame Representated by 224, vehicular meter display can show that message indicates regeneration event then to operator.

Once initiating dpf regeneration, as representated by frame 226, during regeneration event, controller can use proximity transducer Continue to monitor around vehicle.As representated by frame 228, if controller does not sense any object in threshold distance, Regeneration event continues to the cleaning for completing discharge filter.If however, proximity transducer detects threshold value during dpf regeneration Object in distance, as representated by frame 229, controller interrupts and/or terminates regeneration event.As representated by frame 230, subsequently Vehicular meter display shows the related information for having stopped exhaust gas cleaning.As representated by frame 232, vehicular meter display Also can indicate that and detected the object for being close to exhaust.

Can also be terminated by operator or stop dpf regeneration because of various vehicle conditions.Operator can pass through Such as brake pedal, by vehicle shift to travel shelves or for example, by pressing button or switch and terminate regeneration event. Once terminating regeneration event, the vehicular meter display as representated by frame 230 can indicate to have stopped exhaust gas cleaning, ask operator Can be with replacement process.

As representated by frame 234, controller monitors regeneration event to determine whether with monitoring proximity transducer side by side Jing completes exhaust gas cleaning.The monitoring of regeneration event may include for example to monitor the pressure differential or lasting thing specified in the time cycle Part.The controller as cleaned DPF as representated by frame 236 can automatically terminate regeneration event and vehicular meter display can be referred to Show operator cleaned discharge filter and complete regeneration.

Those skilled in the art will be recognized that the various features of the present invention can be using in addition to dpf regeneration The delivery temperature of wherein close vehicle can negatively affect in the engine and vehicle application of surrounding objects.

So, discharge during the system and method for controlling dpf regeneration of the invention have been reduced or eliminated regeneration Heat near vehicle exhaust any object or person adverse effect possibility.Can be used for parking using existing or The vehicle proximity transducer of person's car backing operation provides extra feature functionality and does not require extra vehicle hardware and correlation Cost and complexity.

Although preference pattern is described in detail, those skilled in that art will recognize that in right Plurality of replaceable is designed and embodiment.Various embodiments may be had been described with to provide in terms of one or more desired characteristics Advantage or better than other embodiments and/or the device of prior art.However, as those skilled in that art understand, depending on Can compromise one or more characteristics with reaching the advantage of overall system in specific application.These advantages are included but is not limited to： Cost, intensity, persistence, service life cost, marketability, outward appearance, packaging, size, maintenanceability, weight, machinability, Assembling simplification etc..It is described here in some aspects with regard to one or more characteristics compared to other embodiments and/or existing The less desirable any embodiment of technique device is simultaneously non-excluded outside the scope of the present invention or claim.

Claims (14)

1. a kind of regeneration method of the particulate filter during control vehicle motor is vented, comprising：

Visited by using the proximity transducer installed near exhaust port or tail pipe along the rear portion of the vehicle or bumper Survey from the exhaust port or tail pipe to the distance of object, wherein the proximity transducer is the reversing sensing for the vehicle Device, and the vehicle is city race's automobile on and off duty or truck；And

Show message to operator if the distance is less than threshold value；And

If the distance be less than the threshold value if control regeneration event, so as to be reduced or eliminated regeneration during discharge heat not The possibility of any object or person near vehicle exhaust is affected sharply, wherein the regeneration event is operator initiating；With And

Show the information with regard to the particulate filter to operator.

2. the method for claim 1, wherein the control is comprising terminating the regeneration event.

3. the method for claim 1, wherein the control is comprising preventing to initiate the regeneration event.

4. the method for claim 1, further initiates the regeneration comprising in response to the input by the operator Event.

5. the method for claim 1, is further arranged near the exhaust port or tail pipe at least comprising use One proximity transducer detects the distance.

6. the method for claim 1, further multiple near the exhaust port or tail pipe comprising using Proximity transducer detects the distance.

7. a kind of regeneration method of the diesel particulate filter during control vehicle motor is vented, comprising：

Multiple proximity transducers are provided, proximity transducer described in wherein at least one is installed along the rear portion of the vehicle or bumper Near exhaust port, wherein the proximity transducer is for the car backing sensor of the vehicle, and the vehicle is city City's race's automobile on and off duty or truck；

Distance of the detection from the exhaust port to object；

If the distance is higher than threshold value, show that request operator is input into allow the message of the particulate filter regeneration； And

Terminate the regeneration of the particulate filter if the distance becomes less than the threshold value, to be reduced or eliminated The heat discharged during regeneration negatively affects the possibility of any object or person near the exhaust port.

8. method as claimed in claim 7, further comprising the threshold value is less than if the distance if show to operator Message.

9. a kind of engine exhaust system, comprising：

Particulate filter in the exhaust of vehicle；

It is located at the setting near exhaust port to detect the object near the opening along the rear portion of the vehicle or bumper The proximity transducer of appearance, wherein the proximity transducer is for the car backing sensor of the vehicle, and the vehicle is City race's automobile on and off duty or truck；And

The controller being connected with the proximity transducer, the controller is adapted for being detected in response to the proximity transducer To near the opening the object and control the regeneration of the particulate filter, so as to be reduced or eliminated regeneration during discharge Heat negatively affect the possibility of any object or person near vehicle exhaust.

10. system as claimed in claim 9, further comprising with the controller communicate for operator show with regard to The display of the information of the regeneration of the particulate filter.

11. systems as claimed in claim 10, wherein the display shows message to refer to when there is contrary instruction to regeneration The now object is shown.

12. systems as claimed in claim 9, are further input into for controlling comprising the operator communicated with the controller The regeneration of the particulate filter.

13. systems as claimed in claim 9, further include：

It is used to show the information of the regeneration with regard to the particulate filter to operator with the display that the controller is communicated； And

It is input into the operator that the controller is communicated, wherein the signal from operator input is initiated and terminated again It is raw.

14. systems as claimed in claim 9, further include：

It is used to show the information with regard to the particulate filter to operator with the display that the controller is communicated；And

The input communicated with the controller, wherein the signal from the input initiates regeneration,

Wherein the controller automatically terminates regeneration if the distance detected by the proximity transducer is less than threshold value.