Confidential P_197_V10 RBOS/EDS2 software Documentation Exhaust gas recirculation control AirCtl - 474 Veh - DrvTrn -Eng - AIRSYS - AirCtl 1.12.1999 airctl_overview.fm © All rights reserved by ROBERT BOSCH GMBH, even in the event of industrial proper ty rights . All rights of disposal such as copying and passing on to third parti es . The most important input parameters of the EGR control are · the average speed Eng_nAvrg , · the injection quantities InjCtl_qCurr , InjCtl_qRaw and InjCtl_qDes , · the mass of air per stroke AFSCD_mAirPerCyl . The control variables AirCtl_rEGR and AirCtl_rTVA are the desired relative posit ions of the actuators and are in Percent stated. The exhaust gas recirculation valve ( AirCtl_rEGR ) 100% means t hat the valve is closed and one the maximum possible mass of fresh air gets . 0% accordingly means that the valv e is opened and the minimum fresh air mass is achieved. The Dosselklappe is at AirCtl_rTVA = 100 % o pen , and it raises the maximum air mass one , at AirCtl_rTVA = 0% turns with the throttle closed , the minimum air mass one . To achieve complete Öffenen or closing of the actuators , values for or AirCtl_rEGR AirCtl_rTVA about 100% or below 0 %. The control variables are implemented by the component drivers in duty cycles , see note on Component driver . This control takes place or by means of position controllers . It can also Steller nonlinearities be including building . In certain operating conditions , the controller and the controller are switched off and administrable standard values issued to the driver components , refer to " exhaust gas recirculation control Monitoring and Shutdown ( AirCtl_Monitor ) "on page 490 The other sizes are indicated in the figure for the corresponding Described functions. structure The component has no subcomponents . subfunctions See " exhaust gas recirculation - desired value education ( AirCtl_DesValCalc )" on page 475 See " exhaust gas recirculation - control ( AirCtl - CtlValCalc )" on page 481 See " Adaptive exhaust gas recirculation control ( AirCtl_Governor )" on page 48 2 See " exhaust gas recirculation control - monitoring and shutdown ( AirCtl_Monit or )" on page 490 Confidential P_197_V10 RBOS/EDS2 software Documentation Adaptive EGR controller AirCtl_Governor - 482 Veh - DrvTrn -Eng - AIRSYS - AirCtl 1.12.1999 airctl_governor.fm © All rights reserved by ROBERT BOSCH GMBH, even in the event of industrial proper
ty rights . All rights of disposal such as copying and passing on to third parti es . Adaptive EGR controller ( AirCtl_Governor ) Function group: air system Cartronic structure : Veh - DrvTrn -Eng - AIRSYS - AirCtl Project: EDC16 short Description To control the air mass , an adaptive PI controller is used. It is operated in p arallel with a control , see " exhaust gas recirculation control ( AirCtl )" on page 473 ; are the manipu lated variable components of the controller and the controller added together. In addition, in the present function , a dynamic tax share is de termined for the manipulated variable and the other shares added. The controller can be turned off. Due to the nonlinear b ehavior of the Control system are applied to the parameters of the controller and the dynamic c ontrol of a controlled adaptation adapted to the current operating point . The manipulated variable is limited. If a throttle valve is present, the limited controller manipulated variable in a variable for the ARF - valve and a control variable for the throttle split . The control variables are the desired relative positions of the actuators and ar e expressed as percentages . In Exhaust gas recirculation valve 100% means that the valve is closed and to the m aximum mass of fresh air gets . 0% accordingly means that the valve is opened and the minimum fresh air m ass is obtained. the Dosselklappe is open at the position 100 % , and it raises the maximum air mass one , at position represents 0 % with the throttle closed , the minimum air mass one . To complete Öffenen or closi ng of the actuators achieve, should be used for the manipulated variables values above 100 % or below 0 %. Function in normal operation The exhaust gas recirculation control consists of the PI controller , the parame ter adaptation, the dynamic control system, the manipulated variable limit and the distribution of the manipulated variable for the control of the ARF - valve and the Throttle . Confidential P_197_V10 RBOS/EDS2 software Documentation Adaptive EGR controller AirCtl_Governor - 484 Veh - DrvTrn -Eng - AIRSYS - AirCtl 1.12.1999 airctl_governor.fm © All rights reserved by ROBERT BOSCH GMBH, even in the event of industrial proper ty rights . All rights of disposal such as copying and passing on to third parti es . Table 41 : Range of values of the switch AirCtl_swtGovVal_C For the air mass control, the control deviation AirCtl_mGovDev determined as the difference of the air mass setpoint AirCtl_mDesVal and the actual value AFSCD_mAirPerCyl calculated. AFSCD_mAirPerCy l is using the Air mass meter certain mass of air per stroke . The system deviation is supplied to the PI controller. this calculated and added to the P- and I-component AirCtl_rOutP_mp or AirCtl_rOutI_m p . For this purpose, he added the additional sum
the static and dynamic control shares AirCtl_rCtlVal or AirCtl_rOutD_mp . The in tegrator is stopped , where the controller output limits AirCtl_rGovMax_C AirCtl_rGovMin_C or falls be low or , see "Proportional - Integral and member ( PI) " on page 891 The dynamic control is without share AirCtl_rOutD_mp by differentiation of the r equest injection quantity Idle controller share InjCtl_qDes determined ; this is a standard DT1 element wi th area-dependent gain and Paramteradaption used, see " differential element with time delay 1 Order and st eigungsabhängigem Window ( DT1Win ) "on page 894 Depending on the position of the switch AirCtl_swtGovVal_C is the controller out put or the sum of static and dynamic control signal AirCtl_rCtlVal and AirCtl_rOutD_mp to the range [ AirCtl_ rGovMin_C , AirCtl_rGovMax_C ] limited, which means the controller output AirCtl_rGovOut_mp results . This is i n the two manipulated variables AirCtl_rGovEGR AirCtl_rGovTVA and divided for the ARF and the throttle valve . Figure 220: Distribution of controller output for ARF valve and throttle valve ( Split EGR and TVA ) As a control variable AirCtl_rGovEGR for the ARF - valve of the regulator output AirCtl_rGovOut_mp is used directly . the Manipulated variable AirCtl_rGovTVA for the throttle valve as a function of the controller output and the engine rotation speed Eng_nAvrg determined from the map AirCtl_rTVA_MAP and to the range [ AirCtl_rGov TVAMin_C , AirCtl_rGovTVAMax_C ] limited. The gains of the PI regulator and the DT1 element for calculating the dynamic co ntrol determined in the parameter adaptation . You are range dependent , see "Proporti onal - Integral and member ( PI) " on page 891 and " differential element with time delay 1 Order and steigungsabhängigem window ( DT1Win ) "on page 894 AirCtl_swtGovVal_C importance 0 only air mass control 1 air mass regulation and control AirCtl_rGovOut AirCtl_rGovEGR AirCtl_rTVA_MAP Eng_nAvrg AirCtl_rGovTVA Limit_rGovTVA AirCtl_rGovTVAMin_C AirCtl_rGovTVAMax_C The air mass setpoint AirCtl_mDesVal is calculated by adding the stationary port ion AirCtl_mDesStat_mp and dynamic component AirCtl_mDesDyn_mp calculated. Confidential P_197_V10 RBOS/EDS2 software Documentation Exhaust gas recirculation - desired value education AirCtl_DesValCalc - 479 Veh - DrvTrn -Eng - AIRSYS - AirCtl 1.12.1999 airctl_desvalcalc.fm © All rights reserved by ROBERT BOSCH GMBH, even in the event of industrial proper ty rights . All rights of disposal such as copying and passing on to third parti es . variables
AirCtl_mDesStat_mp : stationary air mass setpoint AirCtl_mDesDyn_mp : dynamic portion of the air mass setpoint AirCtl_mDesBase_mp : stationary base setpoint AirCtl_mDesVal_1_mp : stationary target value with balance correction AirCtl_mDesVal_2_mp : stationary set point with atmospheric pressure correction AirCtl_mDesVal_3_mp : stationary air temperature setpoint with correction AirCtl_mDesVal_4_mp : stationary target value with cooling water temperature cor rection AirCtl_TrmVal_mp : ARF - balance value application parameters AirCtl_mDesBase_MAP : map for determining the stationary base reference AirCtl_swtTrmVal_C : Switch for add. / Mult. balance correction AirCtl_swtAPCorVal_C : Switch for add. / Mult. Atmospheric pressure correction AirCtl_swtATCorVal_C : Switch for add. / Mult. Air temperature correction AirCtl_MaxTrmVal_C : ARF maximum matching score AirCtl_MinTrmVal_C : minimum ARF - balance value AirCtl_TrmVal_C : Default value for ARF balance value AirCtl_APCor_CUR : characteristic for atmospheric correction value AirCtl_NQATCor_MAP : map for speed-and dose-dependent air temperature correction AirCtl_ATCor_CUR : characteristic for air temperature correction value AirCtl_NQCTCor_MAP : map for speed-and dose-dependent cooling water temperature correction AirCtl_CTCor_CUR : characteristic for cooling water temperature correction value AirCtl_mMaxDesVal_C : maximum stationary air mass setpoint AirCtl_mMinDesVal_C : minimal stationary air mass setpoint AirCtl_tCThreshold_C : Cooling water temperature threshold for parameter switchi ng the dyn. Setpoint calculation AirCtl_DT1Wm_C : Deceleration time constant of the dyn. Setpoint generation with a warm engine AirCtl_DKdWm_C : Small signal gain of the dyn. Setpoint generation with a warm e ngine AirCtl_DKdPosWm_C : positive large-signal gain of the dyn. Setpoint generation w ith a warm engine AirCtl_DKdNegWm_C : negative large-signal gain of the dyn. Setpoint generation w ith a warm engine AirCtl_dqDWinPosWm_C : positive small-signal limit for a warm engine AirCtl_dqDWinNegWm_C : negative small-signal limit for a warm engine AirCtl_DT1Co_C : Deceleration time constant of the dyn. Setpoint generation with cold engine AirCtl_DKdCo_C : Small signal gain of the dyn. Setpoint generation with cold eng ine AirCtl_DKdPosCo_C : positive large-signal gain of the dyn. Setpoint generation w ith cold engine AirCtl_DKdNegCo_C : negative large-signal gain of the dyn. Setpoint generation w ith cold engine If AirCtl_swtGovVal_C = 0, that is, the controller is switched off, the controll er-I component is initialized to the value 0. if a shut-off case of the "exhaust gas recirculation control - monitoring and shutd own (AirCtl_Monitor)" exists, has AirCtl_stMonitor not have the value 0, the cutoff cases 4, 5 or 8 are possible. Then, for each shut-off case the controller I component initialized to a special value AirCtl_rIDflVal4_C, AirCtl_rIDflVal5_ C or AirCtl_rIDflVal8_C. If AirCtl_stMonitor is not 0, the DT1 element is independent of the particular v alue of such AirCtl_stMonitor initialized to the restart to output the value 0. monitoring see "exhaust gas recirculation control - monitoring and shutdown (AirCtl_Monitor )" on page 490
keine 0 keiner AirCtl_rGovEGR AirCtl_rGovTVA 0 Schubbetrieb 1 Schubbetrieb AirCtl_rEGRDflVal4_C AirCtl_rTVADflVal4_C 4 Schaltvorgang 2 Schaltvorgang AirCtl_rEGRDflVal5_C AirCtl_rTVADflVal5_C 5 lang andauernder Leerlauf 3 Positive Diagnose der Systemüberwachung oder bleibende Regelabweichung AirCtl_rEGRDflVal8_C AirCtl_rTVADflVal8_C 8 Systemfehler 4 bleibende Regelabweichung 5 zu niedriger Atmosphärendruck 7 zu niedrige Kühlwassertemperatur 8 zu hohe Kühlwassertemperatur 9 zu niedrige Batteriespannung 10 große Einspritzmenge 11 Kaltstart 12 Is the motor speed higher than the limit Eng_nAvrg AirCtl_nOvrRun_C and the curr ent injection amount InjCtl_qCurr smaller than the threshold AirCtl_qOvrRun_C , overrun operation is detected ( AirCtl_stAirCtl_mp = 1). is simultaneously actuates the clutch , that is, ConvCD_stDebVal = 1, a time period during AirCtl_tiClutch_C Shift detected ( AirCtl_stAirCtl_mp = 2). If the clutch is pressed for more than AirCtl_tiClutch_C , is again Push operation detected. In the monitoring system shutdown can be numerous causes detected : Prolonged idling If the engine speed is longer than the time AirCtl_tiLowIdleHi_ C under the idle speed limit AirCtl_nLI_C is long lasting detected idle ( AirCtl_stAirCtl_mp = 3). System error System error , in which the exhaust gas recirculation control is to be powered down, about the function identifier Fid_AirCtl using the diagnostic scheduler of DSM detected ( AirCtl_stAirCtl_mp = 4). The default setting of the function iden tifier is described in the application note . See also " Application Parameters DSM and their function ( DSM_Applikationsparameter ) "on page 779 At low atmospheric pressure The atmospheric pressure APSCD_pVal is monitored wit h a dead band . falls below APSCD_pVal the lower limit AirCtl_pAirLo_C , is to lower atmospheric pressure detected ( AirCtl_stAirCtl_mp = 7). Exceeds APSCD_pVal again the upper limit AirCtl_pAirHi_C is reset detection. At lower cooling water temperature , the cooling water temperature is CTSCD_tCln t with a dead band to be lower Values monitored. Falls below the lower limit CTSCD_tClnt AirCtl_tClntLLo_C is detected at low cooling water temperature ( AirCtl_stAirCtl_mp = 8). Exceeds CTSCD_tClnt again the upper limit AirCtl_tClntLHi_C is reset detection. At high cooling water temperature , the cooling water temperature is CTSCD_tClnt with a dead band on too high values monitored. CTSCD_tClnt exceeds the upper limit AirCtl_tClntHHi_C , is excessively high cooling-water temperature detected ( AirCtl_stAirCtl_mp = 9). f alls below CTSCD_tClnt again the lower limit AirCtl_tClntHLo_C , the detection reset. At lower battery voltage falls below the battery voltage BattCD_u the limit AirC tl_uBattThres_C , is low battery voltage detected ( AirCtl_stAirCtl_mp = 10). In very large injection quantity to the injection quantity of the exhaust gas re circulation control can be switched off.
Therefore, the actual injection quantity InjCtl_qCurr is a hysteresis at large Values monitored. The upper and lower hysteresis depends on the characteristics of AirCtl_qHigh_CUR AirCtl_qLow_CUR or of the engine speed Eng_nAvrg from . InjCtl_qCurr exceeds the upper limit, large injection quantity is detecte d ( AirCtl_stAirCtl_mp = 11). Falls below the lower limit InjCtl_qCurr again , the detection reset. Cold start Cold start is present during startup , ie when the motor status CoEng _st_Eng = COENG_STSTART is , see "Engine Condition ( CoEng_stEngCalc )" on page 320 and during the period AirCtl_tiStrtDelay_mp after start shedding ( AirCtl_stAirCtl_mp = 12). AirCtl_tiStrtDelay_mp is based on the characteristic AirCtl_tiCoStrt_CUR depending on the cooling water temperature CTSCD_tClnt determined. replacement function see " exhaust gas recirculation control - monitoring and shutdown ( AirCtl_Monit or )" on page 490 SG- initialization · The position of the switch software AirCtl_swtGovVal_C is only determined at the SG- initialization and as a message provided. · The states of the controller I- channel and the DT1 element is set to 0 . Input , output, and process variables output variables AirCtl_mGovDev : control deviation AirCtl_rGovEGR : Controller output for exhaust gas recirculation valve ( positio n setpoint) AirCtl_rGovTVA : Controller output for throttle valve ( position setpoint) input variables AFSCD_mAirPerCyl : air mass per stroke AirCtl_mDesVal : air mass setpoint AirCtl_rCtlVal : stationary control of the manipulated variable Eng_nAvrg : average motor speed IATSCD_tAir : air temperature InjCtlqCurr : Current injection quantity ( limited) InjCtl_qDes : Wish injection amount ( without idle controller component) AirCtl_stMonitor : indicator of Abschaltfälle variables AirCtl_rGovOut_mp : output of the controller ( controller output ) AirCtl_rOutI_mp : Output of ReglerI channel AirCtl_rOutP_mp : the output of the controller P- channel AirCtl_rOutD_mp : dynamic control signal ( output of the DT1 element ) AirCtl_facParAd_mp : Total factor for parameter adaptation AirCtl_facNQParAd_mp : factor for parameter adaptation as a function of engine s peed and injection quantity AirCtl_facATParAd_mp : air temperature-dependent factor for parameter adaptation application parameters AirCtl_swtGovVal_C : switch for controller switch-off AirCtl_rGovMax_C : maximum controller output AirCtl_rGovMin_C : minimum allowable controller output AirCtl_PKp_C : Basic value of the proportional gain of the PI controller for sma ll signals AirCtl_PKpPos_C : Basic value of the proportional gain of the PI controller with large positive signals AirCtl_PKpNeg_C : Basic value of the proportional gain of the PI controller with large negative signals AirCtl_mPWinPos_C : upper limit for the small-signal P- channel of the PI contro ller
AirCtl_mPWinNeg_Cn : lower limit for the small-signal P- channel of the PI contr oller AirCtl_IKi_C : Basic value of the integral gain of the PI controller for small s ignals AirCtl_IKiPos_C : Basic value of the integral gain of the PI controller with lar ge positive signals AirCtl_IKiNeg_C : Basic value of the integral gain of the PI controller with lar ge negative signals AirCtl_mIWinPos_C : upper small signal limit for the I channel of the PI control ler AirCtl_mIWinNeg_Cn : lower small-signal limit for the I channel of the PI contro ller AirCtl_DKd_C : Basic value of the gain of the DT1 element for small signals AirCtl_DKdPos_C : Basic value of the gain of the DT1 element at large positive s ignals AirCtl_DKdNeg_C : Basic value of the gain of the DT1 element with negative bulk signals AirCtl_dqDWinPos_C : upper limit for the small-signal DT1 AirCtl_dqDWinNeg_Cn : lower limit for the small-signal DT1 AirCtl_DT1_C : time constant of the DT1 element AirCtl_facNQParAd_MAP : map for parameter adaptation as a function of engine spe ed and injection quantity AirCtl_facATParAd_CUR : Characteristic for parameter adaptation depending on the air temperature AirCtl_rTVA_MAP : map for throttle control variable AirCtl_rTVAMax_C : maximum controller output for throttle AirCtl_rTVAMin_C : minimum allowable controller output for throttle AirCtl_rIDflVal4_C : Initialization for controller I channel at 4 shut-off case AirCtl_rIDflVal5_C : Initialization for controller I channel at shut-off case 5 AirCtl_rIDflVal8_C : Initialization for controller I channel at 8 shut-off case AirCtl_rEGRDflVal5_C : Default value 5 for manipulated variable of the ARF - val ve AirCtl_rEGRDflVal8_C : Default value 8 for manipulated variable of the ARF - val ve AirCtl_rEGRDflVal4_C : Default value 4 for adjusting the size of the throttle AirCtl_rEGRDflVal5_C : Default value 5 for manipulated variable throttle AirCtl_rEGRDflVal8_C : Default value 8 for adjusting the size of the throttle AirCtl_nOvrRun_C : lower speed limit for fuel cut-off AirCtl_qOvrRun_C : lower quantity limit for fuel cut-off AirCtl_tiClutch_C : maximum time for shift detection AirCtl_tiLowIdleHi_C : time limit for idle shutdown AirCtl_nLi_C : Speed limit for idle detection AirCtl_pAirHi_C : upper hysteresis limit for atmospheric monitoring AirCtl_pAirLo_C : lower hysteresis limit for atmospheric monitoring AirCtl_tClntLHi_C : upper hysteresis for monitoring low cooling water temperatur e AirCtl_tClntLLo_C : lower hysteresis for monitoring low cooling water temperatur e AirCtl_tClntHHi_C : upper hysteresis for monitoring high cooling water temperatu re AirCtl_tClntHLo_C : lower hysteresis for monitoring high cooling water temperatu re AirCtl_uBattThres_C : Limit for battery voltage monitoring AirCtl_qHigh_CUR : characteristic for upper hysteresis limit for shutdown at lar ge injection quantity AirCtl_qLow_CUR : characteristic for lower hysteresis limit for shutdown at larg e injection quantity AirCtl_tiCoStrt_CUR : characteristic for time in which the control is switched o ff after start shedding
AirCtl_swtGovVal_C : Switch: Controller off / on AirCtl_nHealHi_C : upper speed limit of the healing area AirCtl_nHealLo_C : lower speed limit of the healing area AirCtl_qHealHi_C : upper limit of the amount of healing range AirCtl_qHealLo_C : lower limit of the amount of healing range AirCtl_tiMaxDef_C : Vorentprellzeit for detecting positive constant CNTRLDEV . AirCtl_tiMinDef_C : Vorentprellzeit for detection of adverse consistent CNTRLDEV . AirCtl_tiMaxOK_C : Vorentprellzeit for healing with a positive constant CNTRLDEV . AirCtl_tiMinOK_C : Vorentprellzeit for healing with negative constant CNTRLDEV . AirCtl_mMaxDev_MAP : map of the limits of detection for permanent control offset Depending on the Abschaltfalls the manipulated variables AirCtl_rEGR and AirCtl_ rTVA for the ARF - valve or the Throttle with default values assigned. If there is no shut-off case , the specific regulator of the manipulated variables AirCtl_rGovEGR and AirCtl_rTVA put through to the component drivers. In addition , shows the status variable AirCtl_stMonitor the current shut-off case where the former is dependent control ler initialization , see " Adaptive Exhaust gas recirculation regulator ( AirCtl_Governor ) " . The status variable AirCtl_stAirCtl_mp will show the cause of the trip with the highest in number. The bit-oriented test point AirCtl_stAirCtlBits_mp shows all the relevant time present at shutdown causes . The bit positions in this case correspond to the nu mbers listed in the table. The following table shows the cases to the shutdown associated default and statu s values and the underlying Shutdown causes . For multiple coexisting Abschaltfällen have the default values wit h the highest Number has priority . Table 42: Abschaltursachen , Abschaltfälle , setting and status values Confidential P_197_V10 RBOS/EDS2 software Documentation Standard PWM output PwmOutCD - 873 docu - IO PwmCD 1.12.1999 pwmoutcd_overview.fm © All rights reserved by ROBERT BOSCH GMBH, even in the event of industrial proper ty rights . All rights of disposal such as copying and passing on to third parti es . 7.4 Standard PWM output ( PwmOutCD ) Function Group: signal input / output Cartronic structure : docu - IO PwmCD Project: EDC16 Function in normal operation task · Selection of the issued duty cycle · Monitoring of power amplifiers for short to battery and ground, as well as idle and over-temperature function The amplifiers can be driven by different sources. The selection will be issued which value , takes place in the component drivers . The normal case, the control by the opera tion of driving software. Occurs debounced output stage error is found, the default value of the error control ha
s priority over the driving software. The output of the duty cycle selected by Kompontentreiber XXX_rHWE_mp done via t he Hardware capsule. In the configuration table for PWM signals of the hardware cap sule more data to the output are such as the assignment of the stored signal to a Steuergerätepin , initialization , etc.. For each amplifier the period XXX_tiPer_C and the inversion of the duty cycle is XXX_stInvOut_C to apply. The status word XXX_stPwrStgActv_C allows the shutdown of a PWM power stage comp onents in driver to be specified. The status word XXX_stPwrStgDia_C allows the shutdown of the diagnosis of a PWM output stage in To specify component drivers . The status flags of these two status words represent ECU states that the cut-off for the Amplifiers or amplifier diagnoses of concern ( the bit positions and the relevan t control device states are for diagnosis shutdown and power amplifier shutdown equal). It is also possible , by setting a special Status flags in the status words XXX_stPwrStgDia_C and XXX_stPwrStgActv_C the ou tput stage or the Disable power stage diagnosis completely applicative (if any ECU states are not here taken into account) . The control units relevant states (see "Output stage coordinator ( CoEng_PwrStgS tateCalc )" on page 352) defined at a central location and calculated. Result of this calculation is the size CoEng_stPwrStgEnaCond , which bit-coded ( in the same format as the corresponding power amplifier status words) ECU states published. The following output signals are treated as standard PWM output stages : 4.6.6 exhaust gas recirculation actuator ( EGRCD_Co ) Function group: air system Cartronic structure : Veh - DrvTrn -Eng - AIRSYS - EGRCD Project: EDC16 short Description Component driver for exhaust gas recirculation actuator , see also " Standard PW M Output" on page 873 Function in normal operation For normal functionality and error handling, see also "Standard PWM Output" on p age 873 The detected exhaust gas recirculation rate from the regulator is in AirCtl_rEGR on the map EGRCD_dcycEGR_MAP Depending on the engine speed Eng_nAvrg converted into a duty cycle . Figure 271 : Overview screen controller test In "Test Demand active = 1 (TRUE) " the value of the running software to control the actuator is not taken, but the value of Tester ( SigTst_EGR ) . This value is the same as the normal va lue on error handling transferred to the controller . In "Test Demand active = 0 ( FALSE) " , the tester gets the return value of the current digit value from the Driving software. For a description of the interfaces for Steller test, see "Handling Steller test requirements by the
Diagnostics "on page 881 Function switch-off of the amplifier / power amplifier diagnosis SigTst_EGR AirCtl_rEGR SigTst_EGR error_handling rHWE stTstImp EGRCD_dcycEGR_MAP Eng_nAvrg Test Demand active (To Tester) (from tester ) Confidential P_197_V10 RBOS/EDS2 software Documentation Exhaust gas recirculation plate EGRCD_Co - 570 Veh - DrvTrn -Eng - AIRSYS - EGRCD 1.12.1999 egrcd.fm © All rights reserved by ROBERT BOSCH GMBH, even in the event of industrial proper ty rights . All rights of disposal such as copying and passing on to third parti es . The shutdown of the fault diagnosis of the output stage can be on the characteri stic value EGRCD_stPwrStgDia_C specify . The shutdown of the output stage is specified by the parameter EGRCD_s tPwrStgActv_C . the two parameters contain information on whether the output stage ( - ndiagnose ) a t certain vehicle conditions should be switched off . Which vehicle states are described by which flag , see "Output stage coordinator ( CoEng_PwrStgStateCalc )" on page 352 Input , output, and process variables output variables EGRCD_rOutHWE_mp : be output duty cycle The associated signal name of the hardware capsule is: A_T_AGR -> : Reference to configuration table of the HWE The associated signal name of the controller tests is: SigTst_EGR : Signal name for Steller test of exhaust gas recirculation input variables AirCtl_rEGR : exhaust gas recirculation rate Eng_nAvrg : engine speed EGRCD_stPwrStg_mp : current error state of the output stage of the hardware caps ule Specified status word which relevant vehicle states : CoEng_stPwrStgEnaCond variables EGRCD_stPwrStg_mp : state of the output stage EGRCD_rOutHWE_mp : be output duty cycle to the hardware EGRCD_stTstImp_mp : Test pulse needed yes / no Dfp_EGRCD_Min_mp : Error path for SRC -Min defect Dfp_EGRCD_Max_mp : Error path for SRC -Max defect Dfp_EGRCD_SigNpl_mp : Error path for plausibility / signal defect application parameters EGRCD_dcycEGR_MAP : map for conversion to duty cycle EGRCD_tiPer_C : period of the exhaust gas recirculation plate EGRCD_stInvOut_C : Invertierungsparameter for the signal EGRCD_stPwrStgActv_C : Status word to specify the shutdown EGRCD_stPwrStgDia_C : Status word for the specification of the fault diagnosis b ehavior Common Application parameters for standard PWM output stages : See Standard PWM component drivers ("Standard PWM Output" on page 873 ) .
Application parameters for the error paths Dfp_EGRCD_Max , Dfp_EGRCD_Min and Dfp _EGRCD_SigNpl : See " DSM application parameters and their function ( DSM_Applikationsparameter )" on page 779
