Abstract: A dual wall, air gap exhaust manifold with an integral inlet connecting flange defining an elongated, internal, air injection passageway enclosed by a configurated, convexly bulging cover plate welded over an elongated corner of the flange to form the elongated passageway, the configurated plate being welded over a series of short channels which extend between the elongated passageway and the manifold inlet openings. The elongated passageway has an air inlet connector.

Abstract: An apparatus for silencing and catalytic treatment of gases has an air-tight casing connected to an exhaust inlet pipe and to an exhaust outlet pipe, acoustic compartments, monolithic bodies, and a diffuser element. The diffuser element is connected to the inlet pipe, or further downstream within the casing. The diffuser element distributes the gases evenly across the inlet face of the monolithic bodies. The diffuser element is a guide baffle or plate and a juxtaposed stagnation baffle or plate, which causes both flow stagnation in front of the stagnation plate and the gases to flow radially within the diffuser element. The diffuser element has apertures which are pervaded by partial flows of the gas and are adapted to provide additional recovery in the gas flow passing through the diffuser element. The geometry defining the fluid flow field within the diffuser is designed to prevent flow separation from the contour walls of the diffuser.

Abstract: A method and apparatus is disclosed for securely attaching existing central aluminum or steel adaptors for air brake actuators to existing steel service brake housings, existing steel emergency brake housings, or both without major modification to either housing or the adaptor. An annular shoulder with an elongated annular flange above it is provided in the steel brake housing, and the aluminum adaptor is provided with a small outwardly extending annular lip. A flexible diaphragm is first placed directly on the shoulder of the steel brake housing. The aluminum or steel adaptor is then placed on top of the diaphragm such that the annular lip of the adaptor fits inside the annular flange of the housing. A slightly deformable annular steel piece is then placed around the aluminum adaptor so that it comes to rest against the annular lip while also touching the annular steel flange of the housing. One or more breaks may be provided in the annular steel piece to facilitate placing it over the aluminum adaptor.

Abstract: A pneumatic-controlled device for a vacuum brake booster having a hollow piston which retains a tubular shut-off member. The tubular shut-off member interacts with a stationary seat and a movable seat to define a chamber within the hollow piston when the movable seat is in an actuation position. An orifice formed in the tubular shut-off member places the chamber in communication with a passage defined between the stationary and movable seats to reduce hysteresis experienced by movement of the movable seat.

Abstract: In an exhaust expansion chamber or tuned pipe of a two-cycle engine in a watercraft, variable amounts of water are injected, thus cooling the temperature within the expansion chamber and matching the sonic wave speed with that of the correct rpm of the motor. Thus, by regulating the temperature of the exhaust gases in the tuned pipe with water, the efficiency of the two-cycle engine at varying revolutions per minute, is improved.

Abstract: An annular inward turned flange and a plurality of ribs are integrally molded on an inner peripheral surface of an cylindrical portion formed at an upper portion of a reservoir for a master cylinder. The ribs extend from a lower surface of the flange and are disposed in a distributed manner in a circumferential direction of the flange. An annular flat surface area is formed on an upper surface of the flange, and a tip end of a working oil filler is placed into close contact with the annular flat surface area. Thus, when a working oil is filled under pressure into the master cylinder and its output hydraulic pressure circuit through the reservoir by the working oil filler, the urging force from the working oil filler can be reliably supported, and the deformation of the reservoir by a filling pressure cannot be produced.

Abstract: A master cylinder comprising a body (4) pierced with a bore (5) closed on a first side by an end (6) and on a second side by a piston (7). The piston (7) slides in the bore (5) to delimit a pressure chamber (8). The pressure chamber (8) is connected by a pressure pipe (12) to at least one brake motor through an outlet (11) therein. The chamber (8) and the pressure pipe (12) together delimiting a working volume filled with a hydraulic fluid. The working volume is partially delimited by a leak-off device (19) which is responsive to an impact to selectively allow hydraulic fluid to leak off toward the outside of the working volume.

Abstract: An external slave cylinder particularly suited for use in a hydraulic clutch release system for a motor vehicle. The cylinder includes a cylindrical body defining a bore, a piston slidably mounted in the bore, a seal positioned between the piston and the bore, a pushrod engaging the rear end of the piston and extending out of the bore, and a preload spring. The spring comprises a conical coil spring positioned exteriorly of the bore, bearing at the reduced diameter rear end thereof against the rear end of the pushrod, and bearing at the large diameter front end thereof against the rear end of the body in surrounding relation to the pushrod. The seal has a cup-shaped configuration and fits over a nose portion provided on the front end of the piston. The seal includes a peripheral lip portion sealingly engaging the bore and a base portion closing the area within the peripheral lip portion and seated against the front end of the piston.

Abstract: In a method for checking the conversion capability of a catalytic converter, in particular a precatalytic converter associated with internal combustion engines of motor vehicles, the checking is undertaken through the use of a temperature measurement immediately downstream of the catalytic converter. Initially the temperature at the beginning and at the end of a predetermined idling phase is measured for a predetermined number of idling phases, following an overrun phase in predetermined operating states of a motor vehicle with an internal combustion engine. Then the difference of the temperature measurements for each idling phase is formed. The sum of all of the temperature differences and the sum of the duration of the idling phases are formed and subsequently a quotient of these results is formed. This quotient determines an average gradient.

Abstract: A one-way clutch mechanism suited to shorten its axial dimension and to prevent the production of a shock noise, in which a side clutch member (20 in FIG. 3) is interposed between a stator side member (18) disposed unitarily with a stator and a stationary-shaft side member (22) disposed unitarily with a stationary shaft, and in which the surfaces of the stator side member (18) and the side clutch member (20) confronting each other are respectively formed with oblique planes (18a, 20a), wherein only when the stator has received a turning force of specified direction from a fluid stream, the stator side member (18) and the side clutch member (20) are brought away from each other into the operational connection of the stator side member (18) and the stationary-shaft side member (22) by the cooperation of the oblique planes (18a, 20a).

Abstract: A pneumatic brake booster having a casing (10) with an axis of symmetry (X-X') divided in a leaktight fashion by a movable wall structure (12) into a front chamber (14) permanently connected to a source of low pressure, and a rear chamber (16). The rear chamber (16) is connected selectively to the front chamber (14) or a source of high pressure by a three-way valve means (36). The three-way valve means (36) is actuated by a control rod (30) capable of pressing, via a front face of a plunger (28), on a rear face of a push rod (56) secured to a reaction disc (58) when a plunger (28) slides in a bore (26) of the movable wall (12). The three-way valve (36) includes a valve element (36) located in a tubular rear part (22) of the movable wall (12) and interacts via of an annular front face (40) with a first annular valve seat (28a) formed on the plunger (28) and with a second annular valve seat (20a) formed on the movable wall (12).

Abstract: A catalytic converter monitor apparatus comprising: a first temperature sensor mounted in a vehicle exhaust system upstream of a catalytic converter catalyst; a second temperature sensor mounted in the vehicle exhaust system downstream of at least a portion of the catalytic converter catalyst; an exotherm monitor coupled to the first and second temperature sensors, providing an output signal indicative of a quantity of exothermic reaction taking place in the catalytic converter; a table generator coupled to the exotherm monitor, receiving the output signal from the exotherm monitor and generating a table of exotherm criteria responsive to the output signal; and an exotherm analyzer coupled to the exotherm monitor and the table generator, providing an output responsive to a comparison between a present value of the output signal and a corresponding criteria stored in the table.

Abstract: An exhaust gas-purifying system for an internal combustion engine includes an alternator driven by the engine. A regulator controls voltage generated by the alternator. An electrically-heated catalyzer is arranged in the exhaust system of the engine and connected to the alternator to be electrically heated by electric power generated by the alternator. An ECU controls the regulator to control the voltage generated by the alternator and supplied to the electrically-heated catalyzer, according to a degree of aging of the electrically-heated catalyzer.

Abstract: Apparatus for connecting tube banks in a shell and tube heat exchanger comprises a tube sheet co-extensive with the ends of a pair of adjoining tube banks into which tube sheet a plurality of aligned U-bends are fitted at their ends. The U-bends are positioned to connect each tube end in one bank with its mirror image tube end in the adjoining bank.

Abstract: A heat recuperative assembly includes a cross-flow ceramic core structure of stacked ribbed layers, the ribs forming channels for the passage of heat transfer fluids, the layers sealed by ceramic cement filled in the outermost channels of each layer. In addition, the ribs adjacent the outermost ribs are more closely spaced in order to provide greater contact area for sealing.

Abstract: A radiating device for a power amplifier etc. comprising a plurality of fin members fitted to an escutcheon body so as to project therefrom and openings formed on the escutcheon body at positions around the base portions of the fin members, respectively.

Abstract: A device for heating liquid for one or several washer systems.The present invention relates to a device for heating liquid for one or several washer systems, e.g. a wind screen washer system, a head lamp washer system, a rear screen washer system, etc, including a heat exchanger, preferably connected into a return pipe from the engine of a car to the cooling system of the engine.An object of the present invention is to accomplish a device for heating of washer liquid with high efficiency although a very simple design.

Abstract: A heat exchanger of the plate and fin type which due to the presence of interacting parts is inherently self fixturing in assembly, obviating a need for a holding fixture in assembly and preparatory to and during brazing. The heat exchanger features use of a plate element formed to restrict relative motion of underlying and overlying parts and universally usable in a heat exchanger core stacking process.

Abstract: A heat exchanger element has a metal tube with fins disposed radially and in rows, to increase the heat exchange surface. The improvement of the invention is that the fins are of elliptical cross section and are arranged in rows which are equally spaced, the major axes of the respective cross sections of the fins in a row being parallel, and being parallel to or at 90.degree. or at 45.degree. to the tube axis, each fin in a row being staggered with respect to the corresponding fins of the adjoining rows. For welding such fins to the tube, there is used a hollow electrode having its inner cavity of substantially cross-like shape and corresponding to the combined outline of two fins having the major axes of their cross section inclined at 90.degree..

Abstract: A heat exchanger having a number of heat exchange tubes and an improved tube support. The support comprises a plurality of strips which are identical and joined together so that the support engages each tube.