BOSCH氧传感器LSU4.9

【实例简介】
博世LSU4.9氧传感器英文详细说明书， The wide band lambda sensor LSU is a planar ZrO2 dual cell limiting current sensor with an integrated heater. It is used to measure the oxygen content and the λ-value of exhaust gases in automotive engines (gasoline and diesel). Its monotonic output signal in the range of λ=0.65
Technical Product nformation Y258E00015e BOSCH⑩ Seite/Page 3 von/of 13 Datum/ Date 14,6,2005 1.3 Sensor e1emen七 The heater supply voltage must be controlled, so that the temperature of the sensor is kept at the operation point. The temperature is measured by measuring the internal resistance of the sensor's Nernst cell Ri, N Nominal internal resistance of h=l nernst cell r for new sensors (operating and calibration point) (measured with Ac f=1...4 kHz 3009 Max, current load of =l Nernst cell Continuous Ac (f= 1...4 kHz ≤2501A for Ri.n measurement Recommended value for reference pumping current ontinuous =20A Max. pumping current into pump cell (In) for rich gas signal(220, 65 9 mA for lean gas signal (air) ≤6mn 4 Isolation resistance (all values for new sensors in static air heater off) between housing and each heater- and sensor circuit connector pin at room temperature 30M9 between sensor signal circuit and heater circuit at 600oC hexagon temperature ≥1Mg between sensor signal pin APE and housing at 600C hexagon temperature: 100kg CAlle Rechte bei Robert Bosch gmbH auch fur den Fall von Schutzrechtsanmeldungen Jede Verfugungsbefugnis, wie Kopier-und Weitergaberecht, bei uns RObert Bosch gmbh reserves all rights even in the event of industrial property We reserve all rights of disposal such as copying and passing on to third parties Technical Product nformation Y258E00015e BOSCH⑩ Seite/Page 4 von/of 13 Datum/ Date 14,6,2005 1. 5 Heater supply Nominal voltage 7.5V Nominal heater power at 7.5 v heater supply at thermal equilibrium in air: approx. 7. W Nominal heater cold resistance at room temp 3.2g for new sensor, including cable and connector Minimum heater cold resistance at -40oC .89 1.6 When the heater is switched on, heater power must be limited as follows: effective heater voltage operating point reached 13V 4 max value heater power reduced voLt during condensation water phase 8.5v ate =04V/s application specific nax in itial value 8.5V f application specific time after heater start Maximum permissible heat up rate with limited heater power tc reduce the thermal stresses in the neat-up phase During the condensation water phase the heater power must be limited to rule out thermo shock damage of the sensor ceramic Heater voltage during condensation water phase VHeff s 2 v Maximum permissible effective heater voltage VH,eff to reach the operating point short time s 30sec (200h cumulated time) ≤13V continuous <12 v Maximum system supply voltage vbatt, ndx ≤16,5V Minimum system supply voltage 0.8V at this system supply voltage the function of the sensor is given in typical applications. This must still be tested in the resp. application Minimum frequency of heater voltage control ≥20Hz recommended value 100Hz Note: the use of the sensor with 24v power systems is not permissible except if a voltage converter system is used Note: duty cycle=(VH,ett /Vbat=) CAlle Rechte bei Robert Bosch gmbH auch fur den Fall von Schutzrechtsanmeldungen Jede Verfugungsbefugnis, wie Kopier-und Weitergaberecht, bei uns RObert Bosch gmbh reserves all rights even in the event of industrial property We reserve all rights of disposal such as copying and passing on to third parties Technical Product nformation Y258E00015e BOSCH⑩ Seite/Page 5 von/of 13 Datum/ Date 14,6,2005 Application conditions 2.1 Temperature measurements Temperature measurements are performed with a special sensor equipped with NiCrNi thermocouples, see sketch. Sensor Type "MABCD"has measurement points at the upper side of the PTFE formed hose (Tupperhose), the cable grom- met (Tgrommer ),the hexagon of the sensor housing Tnexagor) and for the exhaust gas temperature (Texhaustgas). These sensors are available from Bosch -Exhauatqas t 2.2 Operating temperatures Exhaust gas (T ≤930°c Hexagon of the sensor housing (THexagon) ≤600°C Cable grommet (PTFE formed hose sensor side (TGrormet): ≤2500C cable side (upperhose crimp, Tupperhose): ≤200°C Cable and protective sleeve: ≤250°C Connector ≤120°C 2.3 Maximum temperatures 2.3.1(max. 250 h accumulated over lifetime) Exhaust gas ( ≤1030°C Hexagon of the sensor housing (THexagon) ≤6800C 2.3.2(max. 40 h accumulated over lifetime) Cable grommet (PtFe formed hose) sensor side (TGronmct) ≤2800C cable side (upperhose crimp, Tupperhose): ≤230°C Cable and protective sleeve 2800C CAlle Rechte bei Robert Bosch gmbH auch fur den Fall von Schutzrechtsanmeldungen Jede Verfugungsbefugnis, wie Kopier-und Weitergaberecht, bei uns RObert Bosch gmbh reserves all rights even in the event of industrial property We reserve all rights of disposal such as copying and passing on to third parties Technical Product nformation Y258E00015e BOSCH⑩ Seite/Page 6 von/of 13 Datum/ Date 14,6,2005 2.4 Exhaust gas pressure (absolute pressure continuous ≤2.5baY short time max. 250h cumulated over lifetime <4 bar Notes If the operating temperature (2.2)or the max. continuous exhaust gas pressure (2.4 )is exceeded, the sensor accuracy might be limited during this time 2.5 Permissible vibrations Stochastic vibrations: (peak level ≤1000m/s Sinusoidal vibrations ≤300m/s 6cox。aion, humidity The lambda sensor has been developed and tested for use in automotive vehi cles, e.g. damp heat cycling acc. to IEC 68-2-30 test Db (21 days, 40C) salt mist test acc. to iec 68-2-11 test Ka, test time 288 h temperature cycling test acc. to IEC 68-2-14 test Na, 250cyc1es-40°C/130°C sulfur dioxide test with general condensation of moisture acc. tO DIN EN ISO 6988, 6 cycles of 24h submergence test IPx7 acc. to IEC 529 2. Permissible fuel additives In accordance with Din En2 28 for commercially available unleaded fuel or en590 for diesel fuel Contamination by other fuels, additives or oil consumption must be deter mined by the customer by the way of adequate large-scale tests CAlle Rechte bei Robert Bosch gmbH auch fur den Fall von Schutzrechtsanmeldungen Jede Verfugungsbefugnis, wie Kopier-und Weitergaberecht, bei uns RObert Bosch gmbh reserves all rights even in the event of industrial property We reserve all rights of disposal such as copying and passing on to third parties Technical Product nformation Y258E00015e BOSCH⑩ Seite/Page 7 von/of 13 Datum/ Date 14,6,2005 Func七i。na1va1ues All data must be regarded as nominal values, measured under the following conditions The sensor is operated with circuit as in section 1. 1. The heater power is closed-loop controlled, so that the nominal sensor internal resistance is reached. The measurement is done in a lab test bench at pqas=1013hPa Changes in the test gas composition, especially of the H2-concentration will have an influence on the characteristics of the sensor these influ ences are stronger in rich gas than under lean gas conditions 3.1 Nominal characteristic line 150C gas: O2 in N2 Lib I2 concentration xo2 /% Ip meas /mA 1500 0.500 lean gas: o 2 in N2 入=(x02/3+1)/(1-4.77xo2) for H/C=2 0700800901.00111201301101501601701.801902c02102.20230240 0.500 1000 rich gas mixture of synthetic ga 9C0, 7%H, 7%CO2 in N2 1.500 c:nc.x。2/告 3.06.08.2912.020.95 value 0.550.700.300.901.0161.131.431.702.42air 工n,neas/m 2.22-1.82-1.11-0.500.003.330.670.941.382.54 CAlle Rechte bei Robert Bosch gmbH auch fur den Fall von Schutzrechtsanmeldungen Jede Verfugungsbefugnis, wie Kopier-und Weitergaberecht, bei uns RObert Bosch gmbh reserves all rights even in the event of industrial property We reserve all rights of disposal such as copying and passing on to third parties Technical Product nformation Y258E00015e BOSCH⑩ Seite/Page 8 von/of 13 Datum/ Date 14,6,2005 3.2 Time to activity (light-off time) Guide value for the time to activity after switching ≤10s on the sensor heater (mlight -off time" Pressure dependency of the sensor signal a change of the exhaust gas pressure leads to a deviation of the sensor signal, which can be approximately described as follows: 50% 0.0% 150% lambda< 1 0.0% 0,5 0,91 1.9 absolute pressure Absolut-Druck in [bar 4 Temperature dependency of the sensor signal and the internal resistance of the Nernst-celI Rin A temperature change of the sensor ceramic gives a deviation of the sensor output signal of approx. AIp, ncaa/Ip, meas =40/100oC The temperature is known by measuring the internal resistance of the Nernst cell R_N and the following curve: perating point Rr,M=3002 T 100 600 1c00 1100 1200 Ceramic/°C CAlle Rechte bei Robert Bosch gmbH auch fur den Fall von Schutzrechtsanmeldungen Jede Verfugungsbefugnis, wie Kopier-und Weitergaberecht, bei uns RObert Bosch gmbh reserves all rights even in the event of industrial property We reserve all rights of disposal such as copying and passing on to third parties Technical Product nformation Y258E00015e BOSCH⑩ Seite/Page 9 von/of 13 Datum/ Date 14,6,2005 工nsta11 ation ins七卫1 ctions The lambda sensor has been developed and tested for use in automotive en gines only The sensor installation point and the sensor functionality in the full sys tem must be assured sufficiently by the customer through appropriate vehi cle tests under realistic conditions of use Installation in the exhaust system must be at a point guaranteeing repre sentative exhaust gas composition whilst also satisfying the specified tem perature limits 4.2 The heater power must al ways he switched on power controlled (e.g. duty cycled heater power), starting with a maximum ramp-up duty cycle as shown in the diagram in section 1.6.This is necessary to reduce thermal stress of the sensor element during cold starts due to high peak power in the first seconds 4.3 The sensor ceramic element is heated up quickly after heater start After heating up the ceramic all occurrence of condensation water, which could damage the hot ceramic must be ruled out o allow early heating of the sensor to reach a fast sensor activity, the sensor installation location design must be selected in a way to minimize exhaust-side stressing of the sensor with condensation water If this is not possible by design measures, the start of the sensor heater must be delayed until demonstrably no more condensation water appears 4.3.1 Design measures: Locate sensor as close to the engine as possible, respecting max. al lowed temperature range The exhaust pipe in front of the sensor must not contain any pockets projections, protrusions, edges flex-tubes etc. to avoid accumulation of condensation water. A downwards slope of the pipe is recommended Make sure, that the front hole of the double protection tube does not point against exhaust gas stream Attempt to achieve rapid heating-up of the exhaust pipes in the area in front of the sensor and alsc of the complete sensor thread boss area, to avoid developing of condensation water The sensor thread boss must be designed as shown in 4.9 to reach a rapid heat up of the sensor protection tube area. Make sure, that the protec tion tube is fully reaching into the exhaust gas stream 4.3.2 System measures Never switch on sensor heating resp. control unit before engine start Delay of sensor heater start or reduced heater power (see section 1.6 CAlle Rechte bei Robert Bosch gmbH auch fur den Fall von Schutzrechtsanmeldungen Jede Verfugungsbefugnis, wie Kopier-und Weitergaberecht, bei uns RObert Bosch gmbh reserves all rights even in the event of industrial property We reserve all rights of disposal such as copying and passing on to third parties Technical Product nformation Y258E00015e BOSCH⑩ Seite/Page 10 von/of 13 Datum/ Date 14.6,2005 4.4 Installation angle must be inclined at least 10 towards horizontal(elec trical connection upwards ) Thus preventing the collection of liquids be tween sensor housing and sensor element during the cold start phase The angle against the exhaust gas stream should be aimed as 90o. Maximum inclination should be 900+15(protection tube towards gas stream)or 90°-309 other installation angles must be inspected and tested individually 5 Avoid excessive heating up of sensor cable grommet, particularly when the engine has been switched off after running under max. load conditions 6 The use of cleaning /greasing fluids or evaporating solids at the sensor plug connection is not permitted 4. 7 Assembly with special high temperature resistant grease on the screw-in thread (e.g. Bosch-No. 5 964 080 112) 8 Tightening torque: 40-60 Nm, material characteristics and strength of the thread must be appropriate 4.9 Recommended material for the thread boss in the exhaust pipe 25 Temperature resistant stainless 18.5 M18×1.5 steel, e. g x5cxN11810,DIN174401.4301 □0.10.2Rz30 or 1.4303 or sae 30304 or sAe 30305Us standard) Thread boss dimensions should be as in sketch, note that sensor thread must be covered completel C23 Recommendation(*): For hot applications (THexagen>600oC or Tas>930oc)the thread boss should be min. 13mm to avoid overheating of the protection tube welding and to cool down the sensor hexa gon If the length is 216mm (max. 22mm permissible) the danger of thermo shock will be increased due to condensation water formation inside the protection tube CAlle Rechte bei Robert Bosch gmbH auch fur den Fall von Schutzrechtsanmeldungen Jede Verfugungsbefugnis, wie Kopier-und Weitergaberecht, bei uns RObert Bosch gmbh reserves all rights even in the event of industrial property We reserve all rights of disposal such as copying and passing on to third parties 【实例截图】
【核心代码】