Abstract: In an automobile radar apparatus according to the present invention, a light-receiving optical system is rotated in response to an output from an image formation position calculation unit in such a manner that light source is focused on a vertical plane containing an optical axis of the light-receiving optical system; a direction up to the preceding vehicle is calculated from a turning angle in response to an output derived from an angular detecting unit; and a distance up to the preceding vehicle is calculated from an image position of the light source based upon an output derived from the image formation calculation unit.

Abstract: The present invention is directed to a device for detecting alcoholic content in a fuel by finding its refractive index, which is of such a construction that a refractive interface for the fuel is formed at an intermediate portion of a light transmission body; a light emitting element is provided at one end of the light transmission body, from which incident light is introduced into said refractive interface; and a single dimensional light position sensing detector is provided at the other end of the light transmitting body, into which the light refracted at the refractive interface is introduced.

Abstract: Techniques are provided for controlling the operation of an air-fuel ratio control apparatus for an internal combustion engine including feedback control of the air-fuel ratio control. The pump-driving voltage for flowing the pump-driving current used for changing the oxygen concentration is monitored and feedback control is suspended when the pump-driving voltage departs from a predetermined range.

Abstract: An air-fuel ratio detecting apparatus for an internal combustion engine of an automotive vehicle has an air-fuel ratio sensing element disposed in the exhaust manifold of the engine, an electric heater which heats the sensing element to above its activation temperature, and a controller which controls the heater output in accordance with the operating state of the engine, a target air-fuel ratio, and at least one parameter selected from the speed of the vehicle and a temperature parameter so as to maintain the temperature of the sensing element constant even when the exhaust gas temperature of the engine varies.

Abstract: An air-fuel ratio control apparatus for an internal combustion engine comprises feedback control of the air-fuel ratio control, wherein a pump-driving voltage for flowing a pump-driving current is lowered to a predetermined value, and feedback control is suspended when the pump-driving current becomes lower than a predetermined value.

Abstract: The recirculated exhaust gas quantity control apparatus of the present invention is provided with an oxygen sensor at the down stream side of the opening of the exhaust gas recirculating passage to an air intake passage. By detecting the oxygen concentration of mixture gas containing fresh air and exhaust gas being fed to the internal combustion engine, the control apparatus of the present invention constantly checks whether the abnormal condition of the recirculated exhaust gas quantity, in other words, the control apparatus itself, occurs or not.

Abstract: An EGR device for an IC engine is disclosed which comprises an EGR control valve installed in an EGR passageway communicating with an exhaust system and an intake system of an internal combustion engine, an oxygen sensor for detecting the oxygen content of the intake air installed in the downstream of the opening of the EGR passageway in said intake system, a pressure sensor for detecting the atmospheric pressure in the oxygen sensor, and an EGR controller for computing a first quantity corresponding to a target exhaust gas reflux rate, correcting the output signal of the oxygen sensor using the output signal of the pressure sensor, and opening or shutting said EGR control valve in proportion to the deviation of the second quantity thus corrected from the first quantity in order to set the operating condition of the engine in conformity with a predetermined target EGR rate.

Abstract: An air/fuel ratio detector includes an exhaust diffusion chamber having one wall formed by an oxygen pump and another wall formed by an oxygen-concentration difference-actuated electrochemical cell that generates an oxygen differential signal corresponding to the difference in oxygen concentration between exhaust gas in the diffusion chamber and the ambient atmosphere. The differential signal is compared to a reference signal and the difference is used to control a current supplied to the oxygen pump in order to control the oxygen concentration in the exhaust gas. The current level is an indication of the existing air/fuel ratio.

Abstract: A combustion device for a car comprises a fuel-atomizing nozzle for atomizing and injecting fuel, a combustion tube extending along said nozzle in the direction of injection of fuel, a coaxial airstream supplying passage extending along the outer circumference of said fuel-atomizing nozzle, an orifice means for fuel mixture formed near the inlet of said combustion tube and at the lower side of said fuel-atomizing nozzle, an ignition plug placed between said orifice means and said fuel-atomizing nozzle, and a lower airstream supplying passage which has at least one aperture opened to said combustion tube and is placed below said fuel-atomizing nozzle.