TH123738A - A device for estimating / detecting the air-fuel ratio. - Google Patents

Abstract

DC60 (05/08/16) to estimate and detect the local air-fuel ratio which does not match the ratio. Of air to fuel in theory by means of a detector (lambda) whose output changes in the form The theoretical steps are based on the air-fuel ratio. To calculate engine rpm, 15 is calculated the average engine rpm NeA, part for calculating the crank angular speed 23, calculates the crank angular speed (Omega) 1 on the basis of the range of crank pulses around zero. Die on the stuffing And part to do the calculations Capacitance 14 The CE capacitance efficiency is calculated from the difference (delta) (omega) 1. Between speed Average engine revs NeA with 1 unit of crank angular speed (Omega) to calculate the amount of Fuel injected 12 estimates the amount of GF injected fuel for each cycle on the basis. Of the Tout ejection time of the 6-segment fuel injection valve to perform the calculation of the proportional constant 17, the proportional constant K is determined using the CE charge efficiency and the estimated amount of fuel injected Gf when the detector output value 3. Is in the transition zone R when the detector output value knows Not in the R transition zone, the air to fuel A / F ratio is estimated from Proportional stabilizer K, CE recharging efficiency and defined quantity of fuel injected Gf. Amendment 05/08/2016 to estimate and detect the local air-fuel ratio which does not match the ratio. Of air to fuel in theory by means of a sensing (formula) whose output is changed in a form The theoretical steps are based on the air-fuel ratio. To calculate engine rpm 15, average engine rpm NeA is calculated, part to calculate crank angular speed 23, the crank angular speed (Formula) 1 is calculated on the basis of the range of crank pulses around. The upper dead center of the compression And part to do the calculations The charge efficiency 14 is calculated the CE capacitance efficiency from the difference (formula) (formula) 1. Between speed Average engine rev NeA with crank angular speed (formula) 1 unit to calculate the amount of Fuel injected 12 estimates the amount of GF injected fuel for each cycle on the basis. Of the Tout ejection time of the 6-segment fuel injection valve to perform the calculation of the proportional constant 17, the proportional constant K is determined using the CE charge efficiency and the estimated amount of fuel injected Gf when the detector output value 3. It is in the transition zone R when the detector output recognizes Not in the R transition zone, the air to fuel A / F ratio is estimated from Proportional stabilizer K, CE recharging efficiency and defined amount of fuel injected Gf -------------------------------- -------------------------------------------------- ---------------- For estimation And detect the ratio of air to fuel in the area which does not match Theoretical air to fuel ratio by means of a detector (formula) whose output signal is The theoretical variation of the air-fuel ratio To calculate engine rpm, 15 is calculated the average engine rpm NeA, part for calculating the crank angular speed, 23 calculates the crank angular speed. (Formula) On the basis of the range of the crank pulses around the upper dead center of the compression And part to do the calculations Capacitance 14 The CE capacitance is calculated from the difference (formula 1) between the speed Average engine revs NeA with crank angular speed (Formula 1) units to calculate the quantity of Fuel injected 12 is estimated the amount of GF injected fuel for each cycle. Cycle on the basis of the Tout of the 6-segment fuel injection valve to perform constant calculation. The proportional constant 17 determines the proportional constant K using the estimated charge efficiency CE and the estimated amount of fuel injected Gf when the detector output value 3 is in the transition area R when the output signal value of The sensing detector is not in the transition zone R air ratio Per fuel (A / F) is estimated from the proportional constant K, the CE charge efficiency, and the quantity of fuel injected Gf considered.

Claims (1)

Disclaimer (all) which will not appear on the announcement page: EDIT 5/08/2016 1. A device for estimating / detecting the air-fuel ratio, including: a method for estimating the volume of Intake air (14), which is approximately the volume of intake air Introduced into the engine cylinder A route to estimate the amount of fuel injection (12), which estimates the amount of fuel injected (Gf) for each cycle on the basis of the Tout of the fuel injection valve (6); A piece to perform the detection of oxygen concentration (3), which has an output changeover zone (R), where the detection output is based on the remaining oxygen concentration in the gas. A combustion occurs and the detection output changes in a stepwise fashion. Remaining oxygen concentration Which corresponds to the theoretical ratio of air to fuel; And a way to determine the proportional constant (17), which determines the proportional constant (K) of the theoretical air-fuel ratio and the air-fuel ratio by using Estimated intake air volume by means of method for estimating the volume of intake air (14) when the part output value for determining the oxygen concentration (3) is in the transition zone of the output (R) and the volume of Fuel injected (Gf) estimated by way of estimating the amount. Of the injected fuel (12), where when the part output value for detecting the oxygen concentration (3) is not in the transition zone of the output (R), the air-fuel ratio (A / F) can be Get an estimate from The proportional constant (K) determined by the pathway to determine the proportional constant (17), the volume of the air intake, and the amount of injected fuel (Gf). 2. A device for estimating / determining the air ratio. This includes: A path to generate pulses (2) which generates crank pulses for a given rotation angle. Preset each crankshaft angle (9) of the engine; Trajectory for calculating the crank angular speed (23), which calculates the first crank angular speed ((formula) 1) on the basis of the interval ((Formula) 1) of two consecutive crank pulses at dead center. Top of the compression Or above the upper dead center of the engine compression, and calculate the second crank angular velocity ((Formula) 2) on the basis of the interval ((formula) 2) of two alternate crank pulses continuous in stroke. compress; A path to estimate the volume of intake air (14), which calculates the charge efficiency (CE), a function of the intake air volume from the difference. ((Formula (Formula) 1) between the first crank angular speed ((formula 1)) and the second crank angular speed ((formula) 2), which is calculated with the trajectory to perform Calculate the crank angular velocity (23); A route to estimate the amount of fuel injection (12), which estimates the amount of fuel injected (Gf) for each cycle on the basis of the Tout of the fuel injection valve (6); The part to perform the detection of oxygen concentration (3), which has an output transition zone (R), where the output of the residual oxygen concentration detection in the gas. A combustion occurs and the detection output changes in a stepwise fashion. Remaining oxygen concentration Which corresponds to the theoretical ratio of air to fuel; And a way to determine the proportional constant (17), which determines the proportional constant (K) of the theoretical air-fuel ratio and the air-fuel ratio by using The estimated intake air volume by means of an approximation of the intake air volume (14) when the output value of the oxygen concentration detection part (3) is in the transition zone of the output (R) and the amount of fuel at Inject the estimated (Gf) by means of the method for estimating the amount of fuel injection (12), where when the part output value for determining the oxygen concentration (3) is not in the transition zone of the output (R ), The air-fuel ratio (A / F) is estimated From the proportional constant (K) determined by the trajectory to determine the proportional constant (17), the charge efficiency (CE), and the amount of injected fuel (Gf). 3. The device to estimate / perform detection. The air-fuel ratio according to claim 1, which includes an air flow detector which detects the volume of intake air in the engine with the intake air volume detected by the air flow detector. Used for calculation In a way to determine the proportional constant (17), represent the estimated volume of inlet air. A route for estimating the volume of intake air (14) -------------------------------------- --------------------- 1. A device for estimating / detecting the air-fuel ratio, which includes A path to make an approximation of the volume of the intake air (14), which estimates the volume Of the intake air that is introduced into the engine cylinder A way to estimate the amount of fuel injection. (12) which will estimate the quantity Of injected fuel (Gf) for each loop on the basis of drive time. (Tout) of valve (6) fuel injection parts to do the oxygen concentration detection (3) where there is a transition zone of the output (R), where the detection signal output according to the remaining oxygen concentration. In the combustion gas is generated. And the detection output signal will change in The pattern is a step by the remaining oxygen concentration corresponding to the air garden rate per Theoretical fuel and the method for determining the proportional constant. (17) which takes into account the proportional constant (K) of the air-fuel ratio. And the ratio of air to fuel Theoretically, using the estimated suction air volume by the pathway to make an approximation. The volume of air intake (14) When the part output value for detecting the oxygen concentration (3) is in the transition zone of the output signal (R) and the amount of injected fuel. (Gf) calculated by means of way to estimate the amount of fuel injected (12), where when the part output value for determining the oxygen concentration (3) is not in the transition zone of the output. (R) The air-fuel ratio (A / F) is estimated from the proportional constant. (K) determined by means of consideration Set the proportional constant (17) volume of air intake And the amount of fuel injected (Gf)