[특허]Air/fuel ratio manipulation code for optimizing dynamic emissions

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01N-003/20 G06F-015/18
출원번호	US-0257550 (1999-02-24)
발명자 / 주소	Kumar Sanath V. Briden Frank C.
출원인 / 주소	Engelhard Corporation
대리인 / 주소	Negin
인용정보	피인용 횟수 : 48 인용 특허 : 22

초록 ▼

A system for interfacing with the ECU of an automotive vehicle for optimizing engine control to meet emission requirements or engineering targets for catalytic converter systems includes a secondary controller and an emission analyzer. The secondary controller monitors sensor input to the ECU and ac

A system for interfacing with the ECU of an automotive vehicle for optimizing engine control to meet emission requirements or engineering targets for catalytic converter systems includes a secondary controller and an emission analyzer. The secondary controller monitors sensor input to the ECU and actuator output from the ECU so as to mimic an ECU actuator control function by generation of an operating parameter control map(s) functionally identical to that used by the ECU. The emission analyzer receives vehicle sensor input and additional emission data from a bench gas analyzer to similarly produce not only the parameter control map but also emission maps correlated to the operating parameter control map which are systemically changed to optimize emission conversion by the vehicle's catalytic converter system and modify the operating parameter control map. The modified control map is inputted to the secondary controller which bypasses the ECU to control the actuator function in accordance with the modified control map. Emission maps are subsequently generated and the modified control map further modified until conversion of emissions by the vehicle's catalytic converter system is optimized. The system permits engine control to assure emission regulation compliance without knowledge of the ECU's code while also providing design optimization of the catalytic converter.

대표청구항 ▼

[ Having thus defined the invention, it is claimed:] [1.] A method for optimizing the code of a vehicular ECU controlling an internal combustion engine in a vehicle equipped with a catalytic converter system having at least one catalytic converter, to meet vehicular emission objectives, comprising t

[ Having thus defined the invention, it is claimed:] [1.] A method for optimizing the code of a vehicular ECU controlling an internal combustion engine in a vehicle equipped with a catalytic converter system having at least one catalytic converter, to meet vehicular emission objectives, comprising the steps of:a) operating the vehicle to replicate a regulation mandated drive cycle and in the process thereof causing said ECU to output ECU actuator signals;b) generating an A/F ratio map correlated to at least one operating parameter signal inputted to said ECU when and as said vehicle replicates said regulation mandated drive cycle;c) training a second controller to selectively generate said ECU actuator signals by initially monitoring and then mimicking the ECU's generation of said ECU actuator signals;d) during said regulation mandated drive cycle, measuring emissions in the vehicle's exhaust gases before and after the catalytic converter by vehicle sensors and exhaust gas sensors to determine in a bench analyzer specific emissions and total emissions generated at specific intervals in the drive cycle;e) modifying the A/F ratio map to reduce the emissions detected in step d and produce a modified A/F ratio map;f) repeating the drive cycle with modified ECU actuator signals generated by the modified A/F ratio map inputted to the engine by the second controller with the ECU actuator signals bypassed; and,g) sequentially repeating steps d, e and f until the vehicle meets desired emission objectives.

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[미국특허] Air/fuel ratio manipulation code for optimizing dynamic emissions 원문보기

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[미국특허] Air/fuel ratio manipulation code for optimizing dynamic emissions 원문보기

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