Abstract: The dual function exhaust system attachment, which is preferably used with an all-terrain vehicle, includes a muffler, a silencing cap, and a sound-enhancing plug. In a quiet configuration, the silencing cap is mounted to conceal a primary outlet of the muffler. In a loud configuration, the sound-enhancing plug is mounted to conceal a secondary outlet of the muffler. A set of screw threads or sealing mechanism may be used to mount the silencing cap and the sound-enhancing plug. A primary perforated barrier, a solid barrier, at least one secondary perforated barrier, and a pipe section are positioned within a hollow structural body of the muffler to guide the exhaust gas flow from an inlet of the muffler to the primary outlet or the secondary outlet.

Abstract: A muffler valve device for a vehicle may include a chamber fixed at a surface of the wall, a guide rod provided in the chamber and attached at the surface of the wall, a fixing member attached at one end portion of the guide rod and fixing the chamber, a valve disposed slidably on the guide rod between the surface of the wall and the fixing member, and an elastic member located between the valve and the fixing member to provide an elastic force to the valve.

Abstract: The present invention relates to a vehicle control unit (20). The vehicle control unit (20) comprises an input (26) for detecting a start demand and a driving condition. The vehicle control module also comprises a control module (28) arranged to control an engine start attribute according to a first profile (34) and a second profile (36). The vehicle control module (20) also comprises a selection module (30) arranged to select between the first and second profiles (34, 36) based on detecting a predetermined driving condition, in response to detecting a start demand.

Abstract: An exhaust management system for use in a motor vehicle having a muffler and a combustion engine generating an exhaust also has a bypass channel configured to be mounted to bypass the muffler of the exhaust system. The system also has a valve controlling air flow through the bypass channel, and a controller operably coupled with the valve. The controller is configured to be switchable between at least two modes. The at least two modes include a provider dynamic mode configured to be modified by a provider only, and a user dynamic mode configured to be modified by a user. The user has no rights to modify the provider dynamic mode.

Abstract: The muffler for a motorized vehicle includes a housing with an inlet chamber and an outlet chamber, an exhaust inlet, and an exhaust outlet. The muffler includes a first channel with a first noise dampening amount that is within the housing interior, to fluidly connect the inlet chamber and the outlet chamber. The muffler includes second channel with a second noise dampening amount that is within the housing interior between the inlet chamber and the outlet chamber. The first noise dampening amount is greater than the second noise dampening amount. A valve selectively fluidly connects the inlet chamber and the outlet chamber thorough the second channel, and is configured to variably obstruct the flow of exhaust gas through the second channel. In various embodiments, the muffler has more than one inlet chamber and more than one exhaust outlet.

Abstract: A muffler unit configured to be attached to a vehicle includes a first exhaust pipe. The muffler unit includes a muffler and a second exhaust pipe. The muffler includes a first main body preferably having a tubular shape and including a first support with a first opening and a second support with a second opening, and a first lid. The first and second openings are oriented in a radial direction of the first main body. The second exhaust pipe includes a second main body, a second lid covering a right end of the second main body, and an exhaust inlet disposed in a left end of the second main body. The second exhaust pipe extends into the first and second openings and is supported by the first and second supports. The second main body includes a communication port in communication with an inner space of the first main body.

Abstract: An exhaust reversion prevention plate is installed within the exhaust pipe of an internal combustion engine in order to prevent a phenomenon known as reversion, which causes a reduction of power available to the engine. A curved plate is affixed within the exhaust pipe with a threaded stud welded to the plate. The curved plate has a wave shape resembling a sinusoidal wave with several peaks and valleys, which are angularly spaced equally around the central axis of the curved plate.

Abstract: A vehicle exhaust assembly for modifying a sound of the vehicle exhaust includes a housing that is operationally coupled to a vehicle exhaust pipe on a vehicle. The vehicle exhaust is directed into the housing. A baffle is coupled to the housing. A flow of the vehicle exhaust passes over the baffle. The baffle has a plurality of exhaust apertures extending therethrough. The flow of the vehicle exhaust passes through the plurality of exhaust apertures. The plurality of exhaust apertures alters a resonant frequency of the flow of the vehicle exhaust. An audible sound of the flow vehicle exhaust is modified. A knob is operationally coupled to the housing. The knob is operationally coupled to the baffle so the knob moves the baffle. A user selectively moves the knob so baffle is positioned at a selected angle with respect to the flow of the vehicle exhaust. The audible sound of the flow of the vehicle sound is adjusted between a minimum and a maximum resonant frequency.

Abstract: A variable valve for an exhaust pipe that includes a housing disposed within an exhaust line and a partition that is fixed within the housing and divides the inside of the housing into a first exhaust gas channel and a second exhaust gas channel. A gate is disposed within the housing to selectively open and close the second exhaust gas channel and a leaf spring connects the partition with the gate and opens and closes the gate using pressure of an exhaust gas.

Abstract: Snap action valve assemblies for use in conduits of automotive exhaust systems have their operation controlled by use of inertia damper elements coupled to an axle of a rotatable valve plate of the valve assembly.

Abstract: Snap action valve assemblies for use in conduits of automotive exhaust systems have their operation controlled by use of inertia damper elements coupled to an axle of a rotatable valve plate of the valve assembly.

Abstract: A rear muffler assembly for an internal combustion engine has a first and a second muffler through which exhaust gases flow and which are separated from one another. The first and second mufflers have in each case an exhaust gas delivery and discharge through an exhaust gas routing pipe issuing into an exhaust pipe which follows downstream and in which an exhaust gas shutoff flap which can be closed temporarily is disposed. The rear muffler assembly contains two exhaust gas routing pipes, the first exhaust gas routing pipe having within the rear muffler an issue orifice for exhaust gases positively emerging from the second exhaust gas routing pipe, with the exhaust gas shutoff flap closed, into which first exhaust gas routing pipe the exhaust gases from the internal combustion engine flow directly.

Abstract: To provide a motorcycle exhaust system, which is less susceptible to the elevated temperature of the exhaust gases and vibrations induced by the motorcycle combustion engine (E) and in which the sectional area of the exhaust passage can be properly adjusted independence on the operating condition of the motorcycle combustion engine (E), the motorcycle exhaust system includes a motorcycle combustion engine (E) mounted at a location generally intermediate between front and rear wheels (3 and 9), an exhaust passage fluidly connected at one end with an exhaust port of the motorcycle combustion engine (E), a silencer (17) fluidly connected with the opposite end of the exhaust passage and supported by the motorcycle frame structure (FR) at a location generally above the rear wheel (9); and an exhaust control valve (24) disposed in an inlet of the silencer (17) for variably adjusting the sectional area of the exhaust passage.

Abstract: This invention relates to a hermetic compressor used on a refrigerant cycle such as a refrigerator, and discloses a low noise compressor designed to attenuate a resonance sound in a compression chamber and intake pressure pulsing more operatively at a position adjacent to their sources, which intake pressure pulsing occurs at an intake valve port. In the compressor, a resonance space 38 is provided adjacent to the intake valve port 29 that is closer in distance to a noise source. As a result, noise can be reduced more operatively than muffling functions of an intake muffler 31 do. In addition, although acoustic characteristics of the intake muffler 31 amplify noises having specific frequencies, such noises can be attenuated before being amplified.

Abstract: A flapper finger valve assembly for use in an exhaust system. The flapper finger valve includes a tube having a plurality of orifices therethrough. The flapper finger valve assembly also includes a plurality of flapper finger valves generally having a C-shape wherein the flapper finger valves are arranged on an outside surface of the tube. The flapper finger valves are capable of radial movement with respect to the tube. A plurality of retainers generally having a C-shape are arranged around the flapper finger valve. These retainers will define a maximum radial movement for such flapper finger valves on the tube. The flapper finger valve assembly also includes a fastener which will secure the flapper finger valves between a tube and retainers in the flapper finger valve assembly.

Abstract: A flapper finger valve assembly for use in an exhaust system. The flapper finger valve includes a tube having a plurality of orifices therethrough. The flapper finger valve assembly also includes a plurality of flapper finger valves generally having a C-shape wherein the flapper finger valves are arranged on an outside surface of the tube. The flapper finger valves are capable of radial movement with respect to the tube. A plurality of retainers generally having a C-shape are arranged around the flapper finger valve. These retainers will define a maximum radial movement for such flapper finger valves on the tube. The flapper finger valve assembly also includes a fastener which will secure the flapper finger valves between a tube and retainers in the flapper finger valve assembly.

Abstract: This invention relates to an exhaust gas muffler assembly for internal combustion engines which is operable in both a muffled or unmuffled mode. In exterior appearance, the bypass muffler of this invention looks like a conventional muffler having a shell and end caps which enclose the interior components, an inlet for entry of the exhaust gas from the engine, and two outlets for exit of the exhaust gas to atmosphere. A first outlet is preferably positioned opposite to the exhaust gas inlet and connected directly to the inlet by means of a pipe. This pipe is not provided with silencing means. Within the interior of the muffler are silencing means employing a center pipe and an exhaust gas outlet pipe, each of which are provided with silencing means such as apertures in the walls of each pipe. Flow diverting means are removably placed within the first outlet.

Abstract: A suction noise muffler for a hermetic compressor which is capable of enabling a smooth flow of a refrigerant gas and reducing a suction noise by forming a predetermined shaped refrigerant gas flow guide path and a plurality of noise reducing sections, which includes an upper casing having a rectangular outer wall and a plurality of inner walls arranged within the outer wall, and a lower casing whereby the upper casing is inserted into the lower casing, for thus forming a refrigerant gas flowing path and a plurality of noise reducing sections thereby when assembling the upper casing and lower casing.

Abstract: A triad exhaust system comprising a diverter rotatably engaged with a muffler and an exhaust pipe. The diverter has a plurality of ports which are alignable with a muffler intake and an exhaust pipe intake. When the diverter is rotated to a "BOTH" position, diverter ports permit exhaust gasses to exit an exhaust manifold through both the muffler and the exhaust port. When the diverter is rotated to a "MUFFLER ONLY" position, a diverter port permits exhaust gasses to exit the exhaust manifold only through the muffler. When the diverter is rotated to an "EXHAUST PIPE ONLY" position, a diverter port permits exhaust gasses to exit the exhaust manifold only through the exhaust pipe. A quadrant bearing indicia is provided to permit an operator to ascertain the position of the diverter. A flexible cable may be attached to the diverter to permit operation of the triad exhaust system from a remote location such as from the motorcycle handlebars of a motor cycle.

Abstract: An improved exhaust cutout device is provided for an engine having a collector pipe from a header and an exhaust pipe to a muffler. The device consists of a mechanism for diverting exhaust gases. Elements are for fluidly coupling the diverting mechanism between the collector pipe and the exhaust pipe. A structure is for operating the diverting mechanism. In a first operable position, the exhaust gases can pass between the collector pipe and the exhaust pipe to pass through the muffler for a quiet exhaust for city and restricted areas. In a second operable position, the exhaust gases can exit directly into the atmosphere for open road, racing purposes and country driving when more speed, more power and gas economy is required.

Abstract: There is provided a method for controlling an exhaust system of a vehicle including a controller for controlling an open-close operation of an on-off valve which is provided at an intermediate portion of one of a pair of exhaust pipes arranged in parallel and communicating with an exhaust port of an engine depending upon running condition of the vehicle. The control method includes three control patterns different from each other, i.e., a first control pattern during an accelerated running condition of the vehicle, a second control pattern during a constant-speed running of the vehicle, and a third control pattern during a decelerated running condition of the vehicle.

Abstract: Disclosed is an engine-control apparatus in which an exhaust passageway of the engine is provided with plural sound deadening passages. A portion of the plural sound deadening passages is designed to be opened or closed by a shift valve on the basis of a predetermined switching characteristic, and the pressure of the exhaust gases is changed upon the switching of the shift valve. In order to prevent torque shock to the driven wheels which may occur attendant upon operation of the shift valve to open or close or in order to reduce probability that torque shock would occur, there is provided a torque regulating apparatus which permits an adjustment of torque generator by the engine, of a transmission efficiency of power to the driven wheel, or of a switching speed at which the shift valve is switched to open or close, or a change in the switching characteristic.

Abstract: An exhaust system for a V-type six-cylinder engine having first and second banks each having three engine cylinders. The exhaust system includes first and second exhaust systems which are respectively connected to the first and second banks to be supplied with exhaust gas from the engine cylinders. Each exhaust system includes an exhaust tube connecting a catalytic converter and a muffler. The exhaust tubes of the first and second exhaust systems are communicated at a predetermined position by a communicating pipe member. The predetermined position corresponds to location of antinodes of the resonance sound pressure modes in the respective first and second exhaust systems which modes are reverse in phase to each other, so that resonance frequencies in exhaust noise are cancelled thereby to effectively achieve exhaust noise reduction.

Abstract: The heater dump assembly comprises an inlet port; an exhaust port; and a bypass port disposed between the inlet port and the exhaust port. The bypass port may be selectively sealed with a closure assembly to route the exhaust gasses from the exhaust manifold to a muffler to reduce engine noise, or the closure assembly may be removed to allow exhaust gasses to bypass the muffler to reduce back pressure and improve engine performance. The closure assembly may be installed upon the bypass port and sealed thereon with less than one rotation of the handle. Alternately, the closure assembly may be removed from the bypass port with less than one reverse rotation of the handle.

Abstract: A gas silencing system for controlled sound attenuation of the exhaust gas in a motor vehicle comprises a sound attenuation muffler for exhaust gases. The system also includes means providing a bypass passage for gas to flow around at least part of the muffler. Bypass control valve is provided to allow selective regulation of the flow of exhaust through the muffler and the pass-pipe. The bypass control valve is responsive to a modulated pressure signal controlled by the driver of the vehicle. The invention also includes circuits for visually indicating the amount of bypass flow and the sound level of gas leaving the system.

Abstract: A muffler responsive to exhaust flow rate is provided for an internal combustion engine. The muffler includes a body having a variable restrictor located downstream from an inlet port and upstream from an outlet port of the muffler. The variable restrictor includes a valving element with an operative position which varies as a function of engine exhaust flow rate to occlude exhaust gas flow. The variable restrictor is formed with a solid wall disposed about the valving element to define a constricting annular passageway having a cross section that varies with distance from the inlet port and from the outlet port. The passageway cross section for some mufflers will increase in a direction proceeding from the inlet port toward the outlet port, and will decrease proceeding in that same direction in other mufflers, depending upon the type of internal combustion engine employed.

Abstract: In an automotive vehicle installed with a V-6 engine, engine revolution speed and engine load are detected and a selector valve provided in a silencer is normally closed but it is opened when the engine revolution speed exceeds a predetermined engine revolution speed value when the 3rd order component of exhaust sound coincides with a longitudinal resonance frequency within a vehicle cabin when the vehicle is at acceleration. The selector valve which is normally closed is opened when the engine revolution speed exceeds a second predetermined engine revolution speed value when the 1.5th order component of the exhaust sound coincides with the longitudinal resonance frequency.

Abstract: An exhaust silencer for a car includes a housing, a partitioning diaphragm plate, a conduction pipe for conducting therethrough an exhaust gas from the car engine, an exhaust pipe exhausting thereout the exhaust gas to the atmosphere, an exhaust conduit capable of exhausting therethrough the exhaust gas, a valve mounted in the conduit, and a controlling device responsive to the rpm of the car engine for enabling the valve to/not to block up the conduit so that the exhaust gas can be exhausted to the atmosphere in a quicker manner, if desired.

Abstract: A tail pipe structure of a control type muffler having a first outlet pipe and a second outlet pipe provided with a control valve inserted therein, wherein the first outlet pipe is in communication with the downstream side of the control valve of the second outlet pipe. The mechanism of the muffler is such that when the control valve is opened, the exhaust gases flow into the atmosphere from the first and second outlet pipes. Further, even when the control valve is closed, the exhaust gases in the first outlet pipe flow into the atmosphere therethrough while a part of the exhaust gases flow into the second outlet pipe from the first outlet pipe through the communication pipe and is then discharged into the atmosphere.

Abstract: The apparatus would include a body portion positionable intermediate the exhaust manifold and the muffler or the catalytic converters if the car is adapted with such, so that exhaust gases, under a first condition, can flow through the body portion and into the muffler prior to exiting to atmosphere, and under a second condition, via the removal of a plate member, a greater portion of the exhaust gases would be exhausted directly out to atmosphere bypassing the remainder of the exhaust system including the muffler and/or catalytic converter.