An engine system is disclosed that includes an engine, a compound boosting system, and a variable valve. The compound boosting system includes first and second boosters, and is configured and dimensioned to compress air flowing into the engine to increase power and performance The first booster includes a first compressor positioned in a flow path of incoming air, a turbine, and a shaft interconnecting the compressor and the turbine. The second booster is electric and includes a second compressor. The valve is configured, dimensioned, and positioned such that in the open positions, when the second booster is running, air can be recirculated from adjacent an outlet of the second compressor to the inlet of the second compressor to mitigate surge in the second booster.

A control device for an internal combustion engine includes a throttle valve opening degree detector, an air bypass valve controller, and a torque reduction controller. The throttle valve opening degree detector detects an opening degree of a throttle valve which is provided downstream with respect to a compressor of a supercharger. The air bypass valve controller opens an air bypass valve based on a reduction change in the opening degree of the detected throttle valve. The air bypass valve is configured to open and close a bypass path. The torque reduction controller controls the throttle valve to reduce the opening degree of the throttle valve while an automatic transmission connected to the internal combustion engine is in an acceleration shifting in order to execute a torque reduction control. The air bypass valve controller maintains the air bypass valve in a close state during the torque reduction control.

A supercharger structure for an all terrain vehicle or a utility vehicle includes an engine body and a supercharging device. The engine body includes a cylinder having an intake passage and an outtake passage. The supercharging device includes a supercharger, a throttle, an intake manifold, and at least one nozzle. The supercharger includes a chamber having an inlet coupled with the throttle and an outlet connected to the intake manifold. The intake manifold and the at least one nozzle intercommunicate with the intake passage. The at least one nozzle is connected to a fuel supply pipe of a vehicle. External air is drawn in by a guiding device in the chamber, flows through the throttle and the inlet into the chamber, and is pressurized. The pressurized air flows through the intake manifold to mix with fuel ejected by the at least one nozzle and then enters the cylinder.

A method of controlling fuel delivery to an engine includes providing a fluid atomizer, a mechanically driven air compressor, a start up air source, and an air valve coupled between the mechanically driven air compressor and the start up air source, charging the start up air source, delivering compressed air from the start up air source to the fluid atomizer, providing an initial air/fluid mixture with the fluid atomizer, and operating the air valve to direct compressed air from the mechanically driven air compressor to the fluid atomizer.

An engine system includes: an intake line through which fresh air flows; an exhaust line through which exhaust gas flows; an exhaust gas recirculation (EGR) system which recirculates some of exhaust gas to a combustion chamber; a turbocharger having: a turbine that rotates by the exhaust gas; and a compressor rotating by the rotation of the turbine; an intercooler disposed in the intake line at a rear end of the compressor; an intake bypass line penetrating the intercooler from the intake line, adjusting the amount of intake gas to be supplied into the combustion chamber, and merging into the intake line at a front end of the compressor; a recirculation valve disposed in the intake bypass line; and a controller controlling opening and closing of the recirculation valve so that some of the intake gas is supplied into the intake line through the intake bypass line.

Internal combustion engine with at least one turbocharger having a compressor, a bypass valve by means of which the compressor can be bypassed by at least a partial flow of a fuel mixture provided for the combustion, and a control or regulating unit connected to the bypass valve for regulating or controlling a degree of opening of the bypass valve, whereby the control or regulating unit is designed to open and/or at least partially keep open the bypass valve when starting the internal combustion engine.

A method of controlling fuel delivery to an engine includes providing a fluid atomizer, a mechanically driven air compressor, a start up air source, and an air valve coupled between the mechanically driven air compressor and the start up air source, charging the start up air source, delivering compressed air from the start up air source to the fluid atomizer, providing an initial air/fluid mixture with the fluid atomizer, and operating the air valve to direct compressed air from the mechanically driven air compressor to the fluid atomizer.

An engine system includes: an intake line through which fresh air flows; an exhaust line through which exhaust gas flows; an exhaust gas recirculation (EGR) system which recirculates some of exhaust gas to a combustion chamber; a turbocharger having: a turbine that rotates by the exhaust gas; and a compressor rotating by the rotation of the turbine; an intercooler disposed in the intake line at a rear end of the compressor; an intake bypass line penetrating the intercooler from the intake line, adjusting the amount of intake gas to be supplied into the combustion chamber, and merging into the intake line at a front end of the compressor; a recirculation valve disposed in the intake bypass line; and a controller controlling opening and closing of the recirculation valve so that some of the intake gas is supplied into the intake line through the intake bypass line.

An engine assembly is provided that includes an engine throttle and a supercharger placed in series with one another in air flow to the engine. The throttle and supercharger can be controlled so that throttling losses are selectively distributed across the throttle and/or the supercharger. Throttling losses placed across the supercharger can create torque that can be converted to stored energy.

An assembly (1), comprising: a first pipe (11), a second pipe (12), forming a bypass for a portion of the first pipe (11), comprising a compressor (15), a flap, in one of the second pipe (12) and said portion, movable between: a first position allowing the fluid to circulate predominantly in said portion, and a second position allowing the fluid to circulate predominantly in the second pipe (12), a maintaining member configured to bring or keep the flap (3) in the first position, the flap (3) going from the first to the second position when the pressure variation generated by the compressor (15) exceeds a predefined value,
the wall of the second pipe (12) and the flap (3) being configured to define a passage section, said section increasing as soon as possible when said flap (3) closes off said portion.