Patent
Apparatus to control the proportion of air and fuel in the air fuel mixture of internal combustion engines
Wahl J,Zechnall R,Schmidt P +2 more
TLDR
In this paper, an oxygen analyzer responsive to oxygen partial pressure and comprising an oxygen ion conductive solid electrolyte is exposed to the exhaust gases of an internal combustion engine, and the sensed value is applied to a low pass filter which is interconnected in an electrical circuit to control the amount of fuel being admitted, relative to air, so that the air-fuel ratio of the air fuel mixture can be maintained at a predetermined level.Abstract:
An oxygen analyzer responsive to oxygen partial pressure and comprising an oxygen ion conductive solid electrolyte is exposed to the exhaust gases of an internal combustion engine. The sensed value is applied to a low pass filter which is interconnected in an electrical circuit to control the amount of fuel being admitted, relative to the amount of air, so that the air-fuel ratio of the air-fuel mixture can be maintained at a predetermined level. In one embodiment, the mixture is regulated to provide a minimum of unburnt hydrocarbon and carbon monoxide in the exhaust, the remaining noxious exhaust gases formed primarily of nitrogen compounds being neutralized by a catalytic converter, so that the catalytic converter need have only single bed neutralizing only one substantial noxious exhaust component. Control of the amount of fuel can be obtained either by controlling the amount of fuel injected in an injection system, or controlling an additional air path. Sensing of other parameters, such as CO, temperature, and the like, may also be provided.read more
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Patent
Method and apparatus for removal of noxious components from the exhaust of internal combustion engines
TL;DR: In this paper, a temperature sensing device senses the temperature of the reactors, and air is admitted to the exhaust system of the engine to control the temperature thereof; an oxygen signal is being sensed representative of oxygen component in the engine and the mass ratio of air to fuel of the mixture supplied to the engine is controlled to provide for proper air-fuel ratio with minimum noxious exhaust.
Patent
Method and apparatus to reduce noxious components in the exhaust emissions of internal combustion engines
TL;DR: In this article, the composition of exhaust gases from an internal combustion engine is sensed, particularly the oxygen component thereof, and a sensed signal is derived, which is applied to a threshold detector, which triggers whenever the sensed signal passes a certain threshold value.
Patent
Air-fuel ratio control system for internal combustion engines
TL;DR: In this article, an air-fuel ratio control system for internal combustion engines is presented, in which the direction of deviation of the actual air fuel ratio from a preset airfuel ratio is determined by an oxygen concentration detector for detecting the concentration of oxygen contained in the exhaust gases from an internal combustion engine.
Patent
Air-fuel mixture supply control system for use with carburetors for internal combustion engines
Aono Shigeo,Masaki Kenji +1 more
TL;DR: In this paper, an electronic system for controlling a carburetor to supply an air-fuel mixture to an internal combustion engine at an optimum air fuel ratio under all continuously variably conditions of engine speed, engine temperature, throttle opening and atmospheric pressure is presented.
Patent
Carburetor with feedback means and system
TL;DR: In this article, a carburetor having a fuel metering restriction is provided with air bleed valving means for varying the pressure at one side of the metering restrictions to thereby change the fuel-air ratio of the combustible mixture discharged by the car to reflect changes in engine operating parameters.
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Patent
Method and apparatus for monitoring exhaust gas
TL;DR: In this article, a solid electrolyte, electrochemical exhaust gas sensor which is self-correcting with respect to maintaining its operating temperature substantially constant is presented, where the sensor comprises two electrochemical cells sharing a common electrolyte but externally loaded differently to produce different terminal voltages.
Patent
Control device for the fuel feed of internal combustion engines
TL;DR: In this article, the fuel supply may be controlled in response to several variables, as for instance the density or pressure of the fuel, such as temperature, density, or pressure.