Apparatus for calibrating the carbon monoxide emission under idl

Details Apparatus for calibrating the carbon monoxide emission under idl Apparatus for calibrating the carbon monoxide emission under idl

1981-03-04

1983-06-21

Myracle, Jerry W.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

73116, G01M 1500

Patent

active

043888216

ABSTRACT:
An apparatus for carrying out the calibration of engines having a Bosch L-Jetronic electronic injection apparatus which is provided with an electronic control unit connected to a "lambda" probe inserted in the exhaust pipe for the closed loop control for carburetion includes a circuit for determining the difference between the value of a correction signal when the probe is switched into the circuit and the value of the correction signal when the probe is switched out of the circuit and a display device for providing a visual display of the difference. The circuit for determining the difference in the correction signals includes first and second resistors, a voltage stabilizer, an operational amplifier having first and second inputs, a first potentiometer having its resistive element connected between the battery and ground and its wiper connected by the first resistor to the second input of the operational amplifier, a circuit for connecting the first input of the operational amplifier to the output of the integrator to receive the correction signal and a second potentimeter having its resistive element connected between the output of the voltage stabilizer and ground and its wiper connected by the second resistor to the second input of the operational amplifier.

REFERENCES:
patent: 4194471 (1980-03-01), Baresel
patent: 4204505 (1980-05-01), Kawai et al.
patent: 4338900 (1982-07-01), Dilger et al.

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