Abstract: A carburetor having a throttle valve co-rotatable with a small diameter throttle shaft having a free end protruding from an exterior side surface of the associated carburetor body. A throttle lever detent arm is co-rotatable on and with the throttle shaft free end adjacent each body surface. Interengageable detents on the detent arm and body surface are spaced radially away from the throttle shaft rotational axis by a distance, for example, of about three times the shaft diameter. The arm and body detents are releasably engageable with one another for thereby yieldably holding the detent arm and hence the throttle shaft and associated throttle valve in any one of a plurality of selected angular settings.

Abstract: The present invention provides a working machine having an internal combustion engine. The working machine includes a single operation unit comprised of a rotatable body adapted to be selectively rotated between an engine-stop position, engine-start position and choke-activation position, a valve to be rotated about an rotation shaft, an arm attached to the rotation shaft and a link member adapted to be moved in its longitudinal direction to transmit the movement of the rotatable body to the arm. The link member has a distal end coupled with the arm and a proximal end coupled with the rotatable body, and extends between the distal and proximal ends. The rotatable body is formed with an elongated slot receiving the proximal end therein. When the rotatable body is rotated from the engine-stop position to the engine-start position, the proximal end is allowed to displace relative to the rotatable body along the elongated slot without causing any movement of the link member in the longitudinal direction.

Abstract: For an internal combustion engine carburetor (10) having a throttle valve (14) and a choke (22), the throttle valve (14) and the choke (22) can be brought in dependence on each other to different sets of predetermined operating positions which are appropriate respectively for the operating of the engine at no-load, for a cold start, and for a warm start, with a safe and definite adjustment being achieved in that the switch (19) is placed directly on the carburetor (10) and is connected with the choke (22) and in that the choke (22) and the throttle valve (14) are coupled with each other over mechanical couplings (16, . . . 21) with the switch (19) having a different position for each set of throttle valve and choke operating positions.

Abstract: A carburetor arrangement for an internal combustion engine including a two-stroke engine in a portable handheld work apparatus includes an intake channel section (2) which is formed in the carburetor housing (34). A throttle flap (3) is arranged in the intake channel section and is rotatably held by a throttle flap shaft (4). Fuel-conducting channels open into the intake channel section (2) in the region of the throttle flap. A choke flap (5) is mounted upstream of the throttle flap (3) in the intake channel section (2). The choke flap (5) is held by a choke shaft (6) so as to be rotatable. The throttle flap (3) is displaced in a closing direction from an opening position into a closed position and in an opening direction from the closed position into the open position. The same applies to the choke flap (5). The choke flap (5) and the throttle flap (3) are mechanically coupled. The choke shaft (6) is actuable by an operator-controlled element.

Abstract: A carburetor control system for a carburetor including a first cam and a second cam. The carburetor includes a choke valve assembly and a throttle valve assembly. The first cam is connected to the choke valve assembly. The second cam is connected to the throttle valve assembly. The second cam includes a first section and a second section. When the first cam is moved to a choke position the first section can be contacted by the first cam to latch the second cam in a start position. When the throttle valve assembly is moved to a wide open throttle position the second section can contact the first cam to hold the first cam in the choke position.

Abstract: An engine intake control mechanism has a throttle valve that can be rotated to a cold-starting position in response to the closing movement of a choke valve and, even if the throttle valve is opened beyond the cold-starting position, the choke valve is retained at the cold-starting position. Only when the throttle valve is subsequently actuated to return to its original closed position is the choke valve automatically returned to its original opened position. The engine intake control mechanism is especially useful in top handle type portable power working machines, which are subject to undesirable movements of the throttle control lever on the top handle when the engine is being started.

Abstract: A carburetor throttle and choke control mechanism incorporating a choke-throttle cold-start fast idle setting latch mechanism having, in a first embodiment, a blade of a fast idle lever specially contoured for creating upon interengagement with a tang on a throttle lever initial torque resistance to co-rotation of the fast idle lever toward latched condition and then effecting force reversal for creating aiding torque to accelerate the fast idle lever relative to choke lever and thereby open a gap in the push coupling that remains in the latched position of the choke and throttle valves. The choke lever has a relatively rigid pusher leg portion adapted for abutment in push relation with a fast idle lever tang. In a second embodiment an extension of the leg portion in the form of a generally U-shaped resilient spring hook portion is adapted to overlap the tang and releasably hook engage the same when the leg portion is brought into full push abutment with said tang.

Abstract: A carburetor throttle and choke control mechanism incorporating a choke-throttle cold-start fast idle setting latch mechanism having, in a first embodiment, a blade of a fast idle lever specially contoured for creating upon interengagement with a tang on a throttle lever initial torque resistance to co-rotation of the fast idle lever toward latched condition and then effecting force reversal for creating aiding torque to accelerate the fast idle lever relative to choke lever and thereby open a gap in the push coupling that remains in the latched position of the choke and throttle valves. The choke lever has a relatively rigid pusher leg portion adapted for abutment in push relation with a fast idle lever tang. In a second embodiment an extension of the leg portion in the form of a generally U-shaped resilient spring hook portion is adapted to overlap the tang and releasably hook engage the same when the leg portion is brought into full push abutment with said tang.

Abstract: For a system for actuating a carburetor (10) of an internal combustion engine, the carburetor (10) comprising a throttle valve (14) and a choke (22), actuating system for which a switch (19) is provided for with which the throttle valve (14) and the choke (22) can be brought in dependence on each other to different predetermined operating positions which are characteristic of the operating of the engine at no-load, for a cold start and a warm start, a safe and definite adjustment is achieved in that the switch (19) is placed directly on the carburetor (10) and is connected with the choke (22) and that the choke (22) and the throttle valve (14) are coupled with each other over mechanical coupling means (16, . . . 21) so that the switch (19) takes another position in each operating position.

Abstract: An engine intake control mechanism has a throttle valve that can be rotated to a cold-starting position in response to the closing movement of a choke valve and, even if the throttle valve is opened beyond the cold-starting position, the choke valve is retained at the cold-starting position. Only when the throttle valve is subsequently actuated to return to its original closed position is the choke valve automatically returned to its original opened position. The engine intake control mechanism is especially useful in top handle type portable power working machines, which are subject to undesirable movements of the throttle control lever on the top handle when the engine is being started.

Abstract: A control mechanism for a carburetor having a throttle valve and a choke valve each having at least a cold-starting position and a full-speed position. The throttle valve is spring biased toward its third, low idle position, and the choke valve is mounted on a choke shaft and is spring biased toward its full-speed open position. When the choke valve is moved by a choke shaft lever from its open position toward its cold start closed position a fast idle lever associated with the choke valve shaft engages, via releasable latch parts, a throttle lever associated with the throttle valve. The interengaging latch parts of these fast idle and throttle levers hold both valves in their respective cold-starting positions in opposition to their respective biasing springs.

Abstract: A fuel delivery system for an internal combustion engine. The fuel delivery system includes a carburetor housing having an air passage with a throttle valve disposed therein. A choke lever is movably mounted to the carburetor housing for restricting air flow into the air passage. A fuel injection device is provided for injecting fuel into the air passage before the engine is started. Movement of the choke lever to an engaged position simultaneously opens the throttle valve, restricts air flow into the air passage and activates the fuel injection device to inject a predetermined volume of fuel into the air passage. The air-flow restriction and the predetermined volume of fuel are adjusted to compensate for changes in ambient temperature.

Abstract: A control mechanism for a carburetor having a throttle valve and a choke valve each having at least a cold-starting position and a full-speed position. The throttle valve is spring biased toward its third, low idle position, and the choke valve is spring biased toward its full-speed open position. When the choke valve is moved from its open position toward its cold start closed position a fast idle lever associated with the choke valve engages, via releasable latch parts, another lever associated with the throttle valve. The interengaging latch parts of these levers hold both valves in their respective cold-starting positions in opposition to the biasing springs. These latch levers can be released by operator actuation of the throttle valve control, thereby causing the choke valve to be automatically returned to its open position by its biasing spring, or, alternatively, the choke valve can be moved independently to its full-speed position.

Abstract: A carburetor control for a carburetor of an internal combustion engine is provided, in particular for a motor saw, in which the carburetor has a gas throttle (16) and a starting means (25) such as a choke valve. A gas control (11) is connected to the gas throttle, and a start control (20) is connected to the starting means and adjustable between a starting position and an operating position. The gas control (11) has a first stop (26) adapted to engage a corresponding stop (27) on the start control (20) in order to positively adjust the starting means (25) to the operating position, when the gas throttle (16) is opened.

Abstract: A fuel delivery system for an internal combustion engine. The fuel delivery system includes a carburetor housing having an air passage with a throttle valve disposed therein. The air passage has an inlet and an outlet. The outlet is in communication with the engine. Means are provided for simultaneously opening the throttle valve, restricting air flow into the air passage and injecting a predetermined volume of fuel into the air passage before the engine is started. Other means are provided for automatically adjusting the restriction of air flow and the predetermined volume of fuel to compensate for changes in ambient temperature.

Abstract: A small engine carburetor with manually controlled choke and throttle valves and associated idle ports and main metering nozzle supplied with fuel from a common metering chamber. The A/F is automatically adjusted by a solenoid operated poppet valve and/or gear driven needle valve and cooperative electronic control circuitry and system components built-in to the carburetor. A combined accelerator pump and idle circuit shut-off mechanism is also built-in and mechanically operated by the throttle shaft so that only the main nozzle supplies fuel when the engine is running above fast idle. A mechanical choke/throttle interlock mechanism also prevents partial choking when the engine is running above fast idle, and throttle operation above fast idle when choking.

Abstract: A gas actuator assembly for supplying a compressed gas to a container, the assembly includes a self contained supply of compressed gas, preferably in the form of a cartridge of compressed gas which is transmitted through a tube to below the level of a liquid contained in a vessel such as a wine bottle or into a resealable container such as that for the storage of food, an evacuation tube that is provided to remove air from the vessel and an activating device for simultaneously activating the flow of compressed gas and the evacuation of air.

Abstract: An engine control mechanism cooperates with both a manual choke operator and a manual throttle operator. The manual throttle operator actuates a throttle control mechanism and a timing advance mechanism. A lost motion connection interconnects the manual throttle operator and the throttle control mechanism. The manual choke operator actuates a choke control mechanism to close the choke valves associated with the engine charge formers. The manual choke also operates the timing advance mechanism and the throttle control mechanism to advance the spark timing and to slightly open the throttle valves beyond an idle position when the choke valves are closed. Operation of the throttle control mechanism via the manual choke operator, however, does not affect the manual throttle operator due to the lost motion connection between the throttle operator and the throttle control mechanism.

Abstract: A device for controlling a carburetor of an internal combustion engine comprises a throttle control for controlling a throttle (12), and a choke control for controlling a choke valve (14). The throttle control comprises a latch means (15) which in the open position of the throttle prevents closing of the choke valve, and the choke valve comprises a corresponding latch means (16) which in the closed position of the choke valve limits the extent of opening of the throttle.

Abstract: A gas actuator assembly for supplying a compressed gas to a container, the assembly includes a self contained supply of compressed gas, preferably in the form of a cartridge of compressed gas which is transmitted through a tube to below the level of a liquid contained in a vessel such as a wine bottle or into a resealable container such as that for the storage of food, an evacuation tube that is provided to remove air from the vessel and an activating device for simultaneously activating the flow of compressed gas and the evacuation of air.

Abstract: An air freshening device employing a forced air means to diffuse air freshening material housed in the device throughout an enclosed area thereby allowing continuous freshening of the air in said enclosed area. The device is adapted to cover a heating or air conditioning vent, and may comprise either a box-like housing with adjustable front openings (FIG. 1), or a cylindrical housing (FIGS. 2 or 3) having a rotatable container therein holding an air freshening material, with cooperating adjustable slots.

Abstract: An air treatment system has a removable and replaceable cartridge, the cartridge having a cylindrical plastic canister, and having a liquid-permeable vaporizing element disposed in the canister. The canister is located on one side in a cradle inside a housing where air flow is controlled between inlet and outlet ports by a pivoting frame member. A slider is moved up and down outside the housing to simultaneously move a pair of arms inside the housing into closed, partially open or fully open positions relative to the inlet and outlet ports. The canister has ports of special configuration and a baffle is placed in the canister to assist radial air flow and assure that air flows over the coiled air vaporizing element.

Abstract: The invention relates to a work apparatus such as a motor-driven chain saw having an internal combustion engine equipped with an electrical ignition system. Combustion air is supplied via an intake channel and fuel is supplied via a carburetor. The intake channel is provided with a throttle flap and the carburetor with a choke flap. The choke flap is displaceable into a start position by means of an actuating element and a start linkage. In this position, the throttle flap is latched in a pregiven open position. The actuating member for the choke flap is mounted in the forward end portion of a handle attached to the housing and extending in the longitudinal direction thereof. In addition, an operator-actuated lever is configured so as to project outwardly beyond the housing of the handle. Because of this arrangement, the latching between the throttle flap and the choke flap is obtained in a simple manner by latching of the throttle lever journalled in the handle with a switching shaft.

Abstract: A mechanism for idling position adjustment of a diaphragm carburetor will be described. The carburetor includes an idling nozzle which receives a fuel/air emulsion from an emulsifying chamber under idling conditions. The emulsifying chamber receives fuel from a fuel chamber and air from an acceleration port opening into the mixing passage. Furthermore, the emulsifying chamber communicates via a flow control valve to a venting port opening into the mixing passage. The flow control valve is coupled to the shaft of the throttle valve via mechanical connection means so that the idle position of the throttle valve is varied in accordance with manual adjustments of the flow control valve. This allows to adjust the fuel/air ratios under idling conditions by means of a single adjustment member.

Abstract: The invention is directed to a membrane carburetor having an intake channel and a choke flap and throttle flap movably mounted in this channel one behind the other when viewed in the direction of flow through the channel. The choke flap is arranged in the intake channel for enriching the mixture for a cold start. The choke flap is pivoted into an out-of-service position so that the choke flap is fully opened after start and after the engine is running and has warmed. The membrane carburetor is as a rule tuned for the idle condition and for the full-load condition. However, relatively lean mixtures can form in the part-load region which can lead to a non-quiet running of the engine and possibly to engine damage. According to the invention, the throttle flap is coupled to the choke flap via a four-rod linkage for achieving a mixture enrichment in the part-load region of the engine. The choke flap is pivotable independently of the choke flap position predetermined by the linkage for the start position.

Abstract: An improved control apparatus includes an auto-choke for an engine provided by interlocking a choke lever and a throttle lever of a carburetor by way of a temperature-sensitive interlocking rod. The choke lever of the carburetor is provided with a spring for resiliently biasing the choke valve toward its open position. The interlocking rod is made of high molecular material such as high molecular urethane elastomer or the like and has a buckling threshold which varies in dependence upon the temperature. Upon fully opening the throttle valve when the engine is cold, the interlocking rod acts so as to close the choke. Whereas, when the throttle valve is opened when the engine is hot the interlocking rod acts to open the choke under the biasing force of the spring. A speed regulating device is connected to the throttle lever.

Abstract: A carburetor including a throttle valve for regulating the flow of air through the body of the carburetor and to an engine, with fuel being introduced into the air flow for intermixture therewith, and with the device including an air actuated element which is preferably located downstream of the throttle valve and is adapted to be displaced automatically by the air to different positions varying in correspondence with the rate of air flow through the device, and which forms a restriction varying in size with the rate of air flow and acting to enhance dispersal of the fuel within the air and assure intimate intermixture of the air and fuel for optimum functioning of the engine. The fuel may be premixed with a secondary flow of air before delivery of the fuel and secondary air as a combined stream into the primary flow of air, and the combined stream may be drawn by vacuum into the primary flow of air at the location of the restriction formed by the flow actuated member.

Abstract: A system for automatically filling a bubbler, or other vapor delivery system from a reservoir, is disclosed in which the conduit system is purged and pressurized with inert gas, using a unique refill reservoir, level sensing and valving system.

Abstract: The invention is directed to an arrangement for generating a gas mixture. The arrangement includes a vaporizer which is switched into a vaporizer line which starts at a supply line and opens into a user line with the vaporizer line being bridged by a bypass line. The influence of material parameters associated with the metering of the vaporized gas quantity is reduced. For this purpose, the vaporizer line is alternately interrupted at the input and the output of the vaporizer and, when interrupted at the output side, the user line is interrupted by means of a switching element arranged therein.

Abstract: An automatic starting arrangement for a hand-started internal combustion engine is disclosed. Internal combustion engines of this type have a choke flap and a throttle flap positioned one behind the other in the air-intake channel. In order to ensure a reliable starting of the engine independently of manual positioning activities, the invention provides that in the starting operation, the choke flap initially moves independently of the throttle flap. The throttle flap is held in a half-throttle position between the full-throttle position and the idle position. Before the choke flap is brought into its at-rest no-choke position, a movable holding mechanism is actuated and the throttle flap is released.

Abstract: An automatic starting arrangement for a hand-started internal combustion engine is disclosed. Internal combustion engines of this type have a choke flap and a throttle flap positioned one behind the other in the air-intake channel. In order to ensure a reliable starting of the engine independently of manual positioning activities, the invention provides that in the start position the choke flap is coupled with the throttle flap in a position-dependent manner and the choke flap holds the throttle flap in a position between the full-throttle position and the idle position. The choke flap is brought into an at-rest position via an actuating device which is actuable in dependence upon the operating condition of the engine. The choke flap is decoupled from the throttle flap in the at-rest position.

Abstract: A carburetor including a fuel inlet and first air inlet delivering fuel and air to a location at which they are intermixed, and from which they flow toward an outlet of the device, with additional air being introduced into the stream through a second air inlet at a location downstream of the fuel inlet and the first air inlet. A fuel metering valve may deliver fuel to the fuel inlet in precisely measured fashion, with the fuel being supplied to the metering valve by a pressure regulator. The second air inlet may include an air valve assembly having sleeves with apertured side walls which are relatively rotatable to vary the rate of delivery of air through that valve assembly. Full vaporization of the fuel may be enhanced by introduction of air into the stream or streams of intermixed fuel and air at other locations along a circuitous path or paths followed by the fuel air mixture.

Abstract: A throttle control device for the general purpose engine having a throttle lever for moving a throttle valve of the carburetor and a choke lever for moving a choke valve of the carburetor. The choke lever and the throttle lever are moved together with each other in a predetermined timing. A control panel pivotally supporting the throttle lever and the choke lever is swingable in a predetermined angle range.

Abstract: A plurality of interconnected linkages are shown with a resilient clip-like member operatively connected to a first of the linkages and resiliently engaging another of the linkages so as to cause an abutment carried by the first linkage to be held in contact with the other linkage and thereby eliminate rattling noises as would otherwise occur between the first and the other linkage.

Abstract: A variable venturi type carburetor comprising a carburetor body provided with a suction passage therein, a slide valve supported by the body for movement across the suction passage to function as a variable venturi and a butterfly throttle valve pivotably supported by the carburetor body downstream of the slide valve. An interlocking mechanism connects the slide valve and the butterfly throttle valve for operation in correspondence with one another and the interlocking mechanism is arranged in a housing chamber formed in a side portion of the carburetor body. The interlocking mechanism includes a regulator member which is accessible from outside the housing chamber.

Abstract: A variable venturi type carburetor comprising a carburetor body provided with a suction passage for flow of air therethrough, a slide valve supported by the body for slidable movement across the suction passage to serve as a variable venturi and a butterfly throttle valve pivotably supported by the carburetor body downstream of the slide valve. An interlocking mechanism connects the slide valve and butterfly throttle valve together for operating in correspondence with one another and one of the valves is operated by application of an external force thereto. A low-speed fuel nozzle opens into the suction passage in the vicinity of the butterfly throttle valve, an intermediate- and high-speed main fuel nozzle opens into the suction passage opposite the slide valve, and a low- and intermediate-speed primary fuel nozzle opens into the suction passage between the slide valve and the butterfly throttle valve.

Abstract: A variable venturi type carburetor comprising a carburetor body having an intake passage in which is disposed a slide valve slidably supported for travel across the intake passage to function as a variable venturi. A butterfly throttle valve is pivotably supported by the body in the intake passage downstream of the slide valve. A low-speed fuel passageway and a main fuel passageway open into the intake passage proximate the butterfly throttle valve and directly below the slide valve respectively. The slide valve and butterfly throttle valve are interconnected by a linkage for interlocked operation over a range from their fully closed positions to their fully opened positions with the degree of opening of the slide valve being greater than that of the butterfly valve by a predetermined magnitude at least for low opening degrees thereof. An external force is applied to one of the valves to operate that valve and the other of the valves conjointly therewith.

Abstract: In a drink dispenser for dispensing carbonated drinks which includes a source of carbon dioxide at high pressure and a source of carbon dioxide at a lower pressure, the lower pressure being a pressure utilized for dispensing carbonated water, water within a carbonator tank is quickly carbonated by admitting carbon dioxide to the carbonator at the higher pressure until a pressure intermediate the higher and lower pressure is reached, venting the head space of the carbonator to the lower pressure, and, preferably, of repeating these steps a plurality of times.

Abstract: A carburetor is provided which includes a sensor mounted in the engine head for monitoring cooling water temperature, and sensors for monitoring engine RPM and intake manifold absolute pressure. A first positioning unit positions the throttle valve, prior to depression of the accelerator, in a plurality of angular positions as a function of the cooling water temperature. A second positioning unit positions the choke valve as a function of the cooling water temperature to limit the amount of opening of the choke valve caused by air sucked into the carburetor by the engine. The second positioning unit has a spring for biasing the choke valve to close the choke valve to prevent swinging of the choke valve when the engine is turned off. A central processing unit receives signals from the first, second and third sensors to control the first and second positioning units to position the throttle valve and the choke valve respectively.

Abstract: A carburetor includes a choke valve and a throttle valve, a controlling prime mover and a driving shaft rotated by the prime mover. First and second cam plates are provided for controlling the opening of the choke valve. A third cam plate is provided for controlling the opening of the throttle valve. Each cam plate is supported on the driving shaft. A displacement detection plate is also mounted on the driving shaft for detecting rotational displacement of the cam plates. A phase shift preventing arrangement locks together the cam plates for the choke valve, the cam plate for the throttle valve and the displacement detection plate to avoid relative phase shift between the same.

Abstract: An integrated fuel control system for a gasoline engine including a linkage composed of a plurality of pivotable members which enables an operator to effect control of the choking condition of the gasoline engine and the magnitude of its power satisfactorily through a single operating element.

Abstract: In an engine air induction passage, a throttle controls air flow and an air valve is biased to a position which is a measure of the air flow. Linkage between the throttle and the air valve opens the air valve as the throttle is opened and closes the air valve as the throttle is closed; the linkage contains a dashpot which allows the air valve to move gradually from the position to which it is urged by the throttle to its air flow measuring position.

Abstract: A control device comprising a push rod and a wax valve actuating the push rod in response to the temperature of the cooling water of an engine. The push rod is connected to the throttle valve of the carburetor so that the degree of opening of the throttle valve becomes smaller as the temperature of the cooling water of the engine is increased. The amount of air fed into the fuel passage from the air bleed passage is controlled by the push rod so that the amount of the air is increased as the temperature of the cooling water of the engine is increased. A vacuum-operated, time-delay valve is connected between the air-bleed passage and the atmosphere and increases the amount of air fed into the fuel passage from the air-bleed passage following a brief time delay period after the engine starts.

Abstract: A variable venturi-type carburetor comprising a suction piston, a fuel passage, and a needle fixed onto the suction piston and extending through the fuel passage. An air bleed passage is connected to the fuel passage. During engine starting, before the engine begins to rotate by its own power, the vacuum chamber of the suction piston is open to the atmosphere and the air bleed passage is shut off. When the engine begins to rotate by its own power, the vacuum chamber of the suction piston is closed from the atmosphere. After this, the air bleed passage is gradually opened. Such control of the closing of the vacuum chamber and the opening of the air bleed passage prevents engine stall by preventing the fuel mixture from becoming excessively lean when the engine first begins to rotate on its own power and then prevents engine misfires by subsequently reducing the air-fuel ratio to a lean mixture.

Abstract: The carburetor comprises a body provided with a fuel nozzle device, a choke valve and a butterfly rotatably mounted in the body respectively above and below the nozzle system. A spring pulls the choke valve into its fully closed position. A diaphragm sensitive to low pressure prevailing in the intake manifold of the engine is connected to a linkage forming a connection between the choke valve and the diaphragm. A manually operated cam includes a stop which is movable between an active position and a retracted position where it allows, during cold operation, the diaphragm and the linkage to pivot the choke valve between its minimum and maximum opening positions, according to the load on the engine.

Abstract: In order to produce a transition mixture enrichment during acceleration of an internal combustion engine, a carburettor or other mixture generator 1 of the engine with a mixing chamber 2, a main throttle 4 and a choke valve 5, has the choke valve 5 operated by a quick-acting electric drive 6, for example a two-coil rotary setter, which is controlled by a microprocessor 8. The microprocessor is fed with signals which sense the opening of the main throttle 4 and preferably also other engine operating parameters such as temperature and speed. When the main throttle 4 is opened to accelerate the engine, the microprocessor 8 causes the electric drive 6 to close the choke valve 5 abruptly and temporarily. The extent of closure of the choke valve 5 is dependent upon the extent of the throttle opening and on the other operating parameters to give the required mixture enrichment. This arrangement avoids the necessity to provide an accelerator pump.

Abstract: Disclosed herein is an air freshening device comprising an upright housing including, adjacent the bottom thereof, an air inlet and, adjacent the top thereof, an air discharge, a fan in said housing intermediate the air inlet and the air discharge means for causing air flow through the housing, a filter, structure for removably supporting the filter in the housing intermediate the air inlet and the fan in the path of the totality of the air flow through the housing, a sleeve assembly within the housing for introducing into the air flow downstream of the filter a substance to be dispensed, which sleeve assembly is operable to releasably support the filter and includes relatively rotatable inner and outer sleeves, one of the sleeves defining an interior chamber, openings in the sleeves for affording valved access to the interior chamber in response to relative rotation between the sleeves, a coupling for releasably connecting the sleeve assembly and the housing, and a package of the substance to be dispensed lo

Abstract: A carburetor for internal combustion engines comprises, inter alia, a body tube into which the main feed circuit and the idling and progression feed circuit open.During cold-engine starting and operation, the richness and flow rate of the mixture delivered by the carburetor has to be increased. For this purpose, choke valves disposed in the carburetor body tube upstream of the main feed circuit have been used for some time, these when closed enabling the fuel to flow from this latter feed circuit even for low air throughputs through the tube. The carburetor throttle valve is also disposed in a "fast idle" position in order to increase the mixture flow rate.The invention generally relates to a device which controls the positions of the choke valve and throttle valve by taking account of the engine temperature, and more particularly which makes said positions entirely automatic, independently of correct use by the driver.

Abstract: In a carburetor system having an electrically-heated choke system including a first heat generating member which is heated by the power supplied from a battery and a first thermo-sensitive member which is deformed by the heating operation of the first heat generating member and adapted for controlling an opening and closing operation of a choke valve by the deformation of the first thermo-sensitive member, and a fast idle system adapted for controlling an opening and closing operation of a throttle valve, the inventive carburetor controlling system comprises a second heat generating member which is heated by the power supplied from the battery, a second thermo-sensitive member which is deformed by the heating operation of the second heat generating member and controls an opening and closing operation of the throttle valve, a control circuit connected between the battery and the first and second heat generating members, a thermosensor for detecting an atmospheric temperature.

Abstract: During operation of an internal combustion engine at low temperatures, the carburetor choke is closed to the extent necessary to provide the fuel which will maintain the mean effective pressure of combustion equal to the mean effective pressure occurring during operation at normal temperatures. The torque produced during low temperature engine operation is thus maintained equal to the torque produced during operation at normal temperatures.