Abstract: A rectangular or other polygonal shaped lamp, such as a headlamp, comprising a lens member sealed to a reflector member. The lens member is provided with a rearwardly projecting polygonal rim having a surface which fits against and is sealed to a front rim of the reflector unit. The reflector front rim is provided with frontwardly projecting positioning members near at least two diagonally opposite corners, which fit inside corresponding corners of the lens rim for aligning the lens and reflector members together during sealing.

Abstract: A control system for an internal combustion engine is described which allows the engine to be started and stopped while unloaded. The invention incorporates the mechanical linkage operated by a solenoid to control a valve at the interior of the engine and an electronic circuit incorporating one or more time delay relays. The invention provides a means of reducing or eliminating the source of vibration resulting from the starting and stopping of a single cylinder diesel engine. Several embodiments are described including one incorporating an integrated circuit timer and one incorporating two time delay relays.

Abstract: A two cycle, spark ignition, internal combustion engine of the class having a combustion chamber divided into a relatively small ignition region and a larger combustion engine in which the piston reciprocates. Substantially the same stoichiometric fuel-air mixtures are independently supplied to the ignition region in substantially fixed quantities and to the combustion region in variable quantities. These mixtures are compressed simultaneously so that they remain completely separated prior to ignition. The mixtures are stratified with respect to excess air supplied to both regions and to exhaust gases in the engine cylinder, and combustion initiated in the ignition region ignites the variable-sized mixture in the larger region. Burning proceeds from stoichiometric mixtures to lean mixtures as the stratified excess air is mixed into the burning gases. When no fuel is supplied to the combustion region, the ignition region functions independently and burns its fuel efficiently.

Abstract: An active Wien-Robinson suppression filter connected as electrical filter in the electric transmission line from a drive-pedal potentiometer of a motor vehicle to the adjusting member of the throttle valve of the internal combustion engine; the jerking of the motor vehicle which otherwise occurs frequently, can be avoided with the use of such a filter.

Abstract: A system for precise positioning of a fluid control valve including a reciprocating piston at each end of a worm shaft, each to rotate the worm shaft in one direction only, through a scotch yoke and a rotary drive transmission. Selection of a valve determines which rotary drive is operated and a hydraulic piston clutch is engaged each time a particular drive is activated and remains engaged to hold a selected position.

Abstract: Ignition timing for an internal combustion engine is controlled by subtracting a retard correction amount from a basic ignition timing. When engine knocking is detected, the retard correction amount is retarded from the basic ignition timing, but not so that the controlled timing drops below a predetermined limit. If knocking is not detected, the retard correction amount is advanced to thereby control the ignition timing towards, but not exceeding, a knocking limit.

Abstract: A gear wheel engages a driving worm gear with teeth which have a face with a curved portion. As a result, the circumference of the gear wheel has a portion which extends around the worm gear to increase the tooth contact area between the gear wheel and the worm gear. The gear wheel provides flexible support for the teeth. When a driving load is applied between the worm gear and the gear wheel, the gear wheel is flexed and the stepped portion of the face helps to maintain tooth contact area.

Abstract: A controlled amount of a fluid (steam or water or a solution of water plus additives) is injected into an internal combustion engine to improve combustion, efficiency, and to reduce emissions. The amount of the fluid injected is controlled in response to engine need. The steam is generated by the heat produced by the engine. Combustion gas temperature is used to control the amount of steam produced by varying the fluid flow through one or more fixed or variable orifice control valves. The steam is injected in a piston engine to cool peak temperatures, to prevent detonation and pre-ignition, to smooth out hot spots, to prevent auto-ignition or dieseling, and to use the vapor energy in the expansion cycle to increase low speed torque and acceleration. The steam is used to cause full retard of the vacuum spark advance during acceleration at full load from low speed, and a large amount of steam is injected at this point in the cycle to prevent pre-ignition and detonation.

Abstract: A method of controlling an exhaust gas recirculation quantity in an internal combustion engine. The method is adapted to detect, by means of valve opening detecting means, the actual valve opening of an exhaust gas recirculating valve arranged across an exhaust gas recirculating passageway communicating the exhaust passage of the engine with the intake passage thereof, determine the difference between the detected actual valve opening value and a desired valve opening value calculated in response to operating conditions of the engine, and operate a valve actuator means to close or open the exhaust gas recirculating valve so as to minimize the above difference. When the calculated desired valve opening value exceeds a maximum possible valve opening value, the desired valve opening value is set to the maximum possible valve opening value.

Abstract: A temperature sensitive negative-pressure control valve is provided with a pressure adjusting means functioning to output a constant negative-pressure which is determined by the biasing force of an adjusting spring, and a temperature sensitive device for varying the biasing force of the adjusting spring, whereby variation of the biasing force of the adjusting spring imparted to the pressure adjusting device according to the temperature detected by the temperature sensitive device warrants outputting of continuously varying negative-pressure in response to the variation of the detected temperature.

Abstract: An automobile speed control system for use with an automobile includes a throttle valve, actuator means operatively connected to the throttle valve for actuating the throttle valve, a plurality of switch means, detector means for detecting a speed of the automobile, a plurality of automobile speed memories, and electronic control means for storing values dependent on output signals issued from the detector means into the automobile speed memories, respectively, in response to operation of the switch means, for reading the values, one at a time, from the automobile speed memories in response to operation of the switch means, and for energizing the actuator means according to the read values.

Abstract: A compression control system for an internal combustion engine for preventing the engine from knocking and for improving starting characteristics including an air/fuel mixture feedback circuit for feeding some of an air/fuel mixture in an engine combustion chamber back to the intake duct at a controlled rate. The feedback rate of the air/fuel mixture is determined on the basis of the engine operational condition and is controlled by a compression control valve inserted in the feedback circuit. The compression control valve is associated with a controller which detects the engine operating condition and determines the open period of the compression control valve in accordance with the engine operating condition. The controller also detects the engine operational position in the engine revolution cycle to synchronize the operation of the compression control valve with the engine revolution so that the compression control valve is opened for the controlled duration during the compression stroke of the engine.

Abstract: A lighting control system is provided which utilizes a light responsive sensor means and a control system to respond to the skylight illumination while rejecting direct sunlight as a control parameter. The skylight illumination level is used to control lighting power controllers that can dim interior lighting equipment in a defined pattern to maintain a uniform light level at a work surface and to conserve electrical energy.

Abstract: An internal combustion engine that has automatic stroke length control and independent compression ratio control. The engine is of the reciprocating piston type using conventional valving and intake and exhaust manifolding. Stroke length control is effected by a first planetary gear set driven in oscillation by the piston and a clutch mechanism which selectively locks the gear set to oscillate through either a long arc length for the long stroke or a short arc length for short stroke. Compression ratio adjustment, as well as piston top dead center phasing during and after clutching, is effected by a second planetary gear set driven in oscillation by the piston and a servo-motor for varying the phase of oscillation of the second planetary gear set to shift the top dead center position of the piston as desired independently of the length of stroke of the piston.

Abstract: A fuel cut-supply control system for a multiple-cylinder internal combustion engine which can effectively prevent engine vibration or shock generated when fuel is cut off or resupplied. The cylinders of the engine are divided into two cylinder groups and fuel is cut off or resupplied to one cylinder group a predetermined delay time after fuel has been cut off from or resupplied to the other cylinder group. The delay time is so determined that vibration caused by the first cylinder group is 180 degrees out of phase with that caused by the second cylinder group. The control system according to the present invention comprises a delay circuit and a first and second fuel cut-supply control sections, in addition to the conventional fuel cut-supply control system.

Abstract: An exhaust-gas recirculation (EGR) system has a main control device that supplies a control signal to an EGR valve actuating device that opens an EGR valve to a desired extent. Under normal conditions, a pulse actuating signal having a time-width corresponding to a difference between the actual opening of the EGR valve and the desired opening is supplied to the valve actuating device. Then, the next actuating signal is fed to the valve actuating device after a given length of quiescent time. When the desired opening changes suddenly, however, the normal operation is discontinued and an actuating signal corresponding to a new desired opening is supplied to the valve actuating device. By so doing, the EGR valve is at all times opened to the desired extent, not only under normal conditions but also when the desired amount of valve opening changes suddenly.

Abstract: A fuel supply control method for electronically controlling the quantity of fuel being supplied to an internal combustion engine at the start of the engine, in response to values of engine control parameters including at least the engine temperature. When there is an abnormality in an engine temperature detecting means that detects the value of the engine temperature, while the engine is operating in a predetermined starting operating condition, control is effected by gradually increasing the quantity of fuel being supplied to the engine with the progress of time starting from a time the engine starter is switched on, by the use of a predetermined dummy signal indicative of engine temperature, in place of an output signal from the aforementioned engine temperature detecting means. Preferably, the value of the above dummy signal is set so as to change from a higher engine temperature value to lower engine temperature values in a successive and stepwise manner at an interval of a predetermined period of time.

Abstract: A control device is proposed for regulating the exhaust gas recycling rate in an internal combustion engine with self-ignition in which combustion pressure signals are adjusted directly or indirectly to nominal values dependent on operating characteristics of the engine. In one particular embodiment the combustion pressure signal is differentiated and the frequency of certain occurring amplitude values is adjusted to a nominal value. Owing to the integration of specific combustion processes into the regulation, the device is capable of operating with relatively high precision. It is particularly well suited to compensate for drift phenomena.

Abstract: This invention is concerned with an exhaust valve for Diesel engine and a method thereof, in which a seat of the exhaust valve is formed with coated layer comprising ceramics and metals, the layer becoming thicker in density of ceramics as coming nearly to the surface thereof. The seat may be formed with the coated layer by subjecting to pressing-heating treatment after coating. This kind of the exhaust valve is provided by coating ceramics and metals onto a seating portion of the mother material such that ceramics becomes thicker in density as advancing to the surface, and heating the coated layer in electric conductivity while pressing the layer with the tool in non oxidizing atmosphere.

Abstract: A suction system for an internal combustion engine having a sub-suction path for generating a swirl of suction gases in a combustion chamber. The sub-suction path is in addition to the main suction path to be opened or closed by a suction valve. More specifically, in a multicylinder internal combustion engine, path portions for constructing the sub-suction path are formed in a cylinder head, a suction manifold and a carburetor such that the sub-suction path is automatically constituted when the carburetor is connected to the cylinder head through the suction manifold, without further connections being necessary.