Abstract: An internal combustion engine and method for operating the engine wherein a leaner than stoichiometric air/fuel ratio is maintained under all running conditions. The desired torque curve is obtained by increasing the amount of boost generated to the intake air charge without enrichening the air/fuel mixture. In addition, an anti-knocking system is incorporated that avoids knocking by retarding the spark advance and, at the same time, providing a leaning in the air/fuel mixture.

Abstract: A supercharging device for an internal combustion engine includes a runner for compressing air, a driven pulley for rotating the runner, and a drive pulley for rotating the driven pulley. The drive pulley has a fixed sheave and a movable sheave movable in an axial direction with respect to the fixed sheave. A belt is wound around the driven pulley and the drive pulley. A control device is for moving the movable sheave in an axial direction so that the movable sheave is moved away from the fixed sheave under a low load condition and that said movable sheave is moved towards the fixed sheave under a high load condition.

Abstract: An internal combustion engine with combined pressure charging has an exhaust turbocharger turbine arranged in an exhaust conduit of the internal combustion engine driving a compressor arranged in an intake conduit. A mechanically driven supercharger is arranged downstream of the compressor and is coupled continuously variably to the engine via a Fottinger speed transformer with variable-pitch guide vanes and variable speed slip. To bypass the mechanically driven supercharger, a bypass conduit is provided. A circulating-air slide is arranged in the bypass conduit for controlling the air quantity bypassing the mechanically driven supercharger. The degree of opening of the circulating-air slide and the slip of the Fottinger speed transformer are controlled as a function of operating parameters such that the charge-air pressure is adjusted to a predetermined set point value.

Abstract: A two-cycle internal combustion engine configuration and control strategy in which the unburned hydrocarbon emissions in the exhaust gas are measured by a sensor in the exhaust manifold. The information from the sensor is used to control the outflow of air from a blower mixed with the fuel to vary the total volume of fuel and air to thus reduce unburned hydrocarbons in the exhaust gas.

Abstract: A mechanical supercharger includes a housing, first, second and third shafts rotatably supported on the housing, respectively, a first timing gear disposed on the first shaft, a second timing gear disposed on the second shaft and engaged with the first shaft timing gear, a first rotor disposed on the first shaft, a second rotor disposed on the second shaft and engaged with the first rotor, a first pulley disposed on one end of the first shaft, an electromagnetic clutch interposed between the first shaft and the first pulley and being selectively intermittent a transmission of driving force between the first shaft and the first pulley, a reduction gear disposed on one end of the third shaft through an one-way clutch and engaged with the second timing gear, a second pulley disposed on the other end of the third shaft and a driving force transmission means for transmitting driving force of engine to the first and second pulleies so that the first and second pulleies are simultaneously rotated in the same directi

Abstract: An engine having a turbocharger is supercharged by an air compressor and decelerated by another air compressor. These two air compressors are connected with the crankshaft of the engine. The former air compressor possesses a capacity smaller than the latter. Clutches are provided between the air compressors and crankshaft. When the engine is operated at a low speed and the supercharging to the turbocharger is insufficient, the supercharging air compressor is activated whereas when the engine is operated at an intermediate or high speed an a large brake force is required, the brake air compressor is activated to ensure a safe deceleration of the vehicle.

Abstract: In a mechanical drive mechanism for a supercharger of an internal combusion engine, a rotor fastened to a rotor shaft is driven by the internal combustion engine's crankshaft, an electromagnetically activated separating clutch and a step-up gear. To create favorable structural dimensions of the supercharger drive mechanism in axial and radial extension and a favorable support for an input shaft of the step-up gear, the step-up gear is a planetary gear, with the input shaft supported in an axially projecting collar on the transmission case and the electromagnetically activated separating clutch located on the periphery of that collar. A clutch disk is to be located on one side of this bearing and a ring gear is to be located on the input shaft on the other side.

Abstract: A control system for an internal combustion engine having an air pump provided in an intake passage for supplying air into a cylinder of the engine. A continuously variable belt-drive automatic transmitting device is provided between a crankshaft of the engine and a drive shaft of the air pump. The transmitting device control unit is controlled by a control unit in accordance with operating conditions of the engine. A throttle valve is provided upstream of the air pump.

Abstract: In a mechanical driving mechanism of a supercharger (1) for an internal combustion engine, which, starting from the internal combustion engine, acts on a rotor shaft (12) of a rotor (14) located on a supercharger housing through a planetary gear assembly (3) that is geared up, a compact construction of the driving mechanism and a balancing out of vibration between a primary shaft (2) and the rotor shaft (12) can be achieved. For that purpose, a ring gear (6) is propelled by the primary shaft (2), while the rotor shaft (12) that receives a sun wheel (8) is accommodated in a hub part (15) of a pinion cage (16) of the planetary gear assembly (3).

Abstract: In a mechanically driven supercharger (1) whose rotor (6) is propelled by an internal combustion engine by way of a primary shaft (2), a planet gear (8) that is geared up and a rotor shaft (7), the working life of a support (11, 12) for the rotor shaft (7) is increased. For that purpose, the support floats with radial play (17) and axial play (19) in a fixed housing section (10) of the supercharger (1).

Abstract: An internal combustion engine with a supercharging system that includes both a turbocompressor and a positive displacement rotary compressor of the Wankel type wherein the rotary compressor provides compressed air to the engine at low operating speed and the turbocompressor provides sufficient compressed air at high operating speeds to drive the rotary compressor while providing sufficient air to power the engine.

Abstract: A fluid pump having a housing, a pair of rotors, a pair of rotor shafts for supporting the rotors in the housing, identical mating gears provided on the rotor shafts, and rotary drive for rotating the rotor shafts to rotate the rotors, and comprising a one-way clutch operatively connecting the rotary drive to the rotor shaft, a multiple-disc clutch operatively connecting the rotary drive to the other rotor shaft, and coils for generating a magnetic force by which the multiple-disc clutch is activated. When the multiple-disc clutch is not activated, rotation of the rotary drive is transmitted to the rotor shaft through the one-way clutch, and when the multiple-disc clutch is activated by the coils, rotation of the rotary drive is transmitted to the other rotory shaft through the multiple-disc clutch. By activating or inactivating of the multiple-disc clutch, it is possible to change the drive-driven relationship between the rotor shafts, so that a nonuniform wear of the mating gears is eliminated.

Abstract: A supercharging apparatus for an internal combustion engine wherein a supercharger is disposed in the intake passage of the engine. A stepwise variable transmission drives the supercharger. The transmission has a plurality of gear stages so that the rotational characteristics of supercharger can be changed. The stepwise variable transmission has a one-way clutch that interrupts the driving relation between a lower gear stage and the engine output shaft during shift-up operation. Therefore, rapid shift-up operation and shockless shift-down operation are obtained.

Abstract: A drive system especially for motor vehicles and the like, with a conventional internal combustion engine, having at least planetary gearing and a mechanism for the mechanical boosting of the engine, comprising a compressor with displacement effect, a forwardly disposed low pressure chamber and rearwardly disposed high pressure chamber, which are connected together by return-flow ducts and throttle valves. Power transmission, speed change and engine boosting are controlled in running operation by throttling the air flow, in which respect the compressor, driving by way of a system-specific distributor gear, transmits power back to the distributor gear as a reaction element and thus forcibly influences the drive torque or speed of rotation of the power take-off shaft, while on the other hand as a compressor it provides charging air, stationary low pressure in the intake-side of the low pressure chamber makes possible an autonomous cooling of the system.

Abstract: An internal combustion engine may be driven in the suction mode as well as the supercharging mode. Switchover from the suction to the supercharging mode takes place with the accelerator pedal in a switchover position, and switchback to the suction mode is effected in the return switching position of the accelerator pedal. The switchover and switchback positions are offset with respect to each other with the accelerator pedal in a central position between its initial position and its final position. The arrangement is such that the switchover position is reached at the end of the suction mode at fully open throttle flap (full power position). Upon switchover the throttling of the supercharging flow (throttling begin position) is increased as compared to the end of the suction mode. This throttling of the supercharging is diminished by further actuation of the accelerator pedal in the direction of the final position.

Abstract: A process for the load-dependent control of a hydraulic drive for a compressor arranged at an internal-combustion engine, the compressor being driven by a hydraulic motor that, in turn, is acted upon by pressure from a hydraulic pump, the internal-combustion engine itself driving the hydraulic pump. In order to ensure a relatively high compressor speed as early as during the idling operation of the internal-combustion engine, and have available an optimal torque for a positive load change, while keeping minimal the additional fuel consumption required for the hydraulic drive, during the idling operation of the internal-combustion engine, the hydraulic pump is adjusted into the full-delivery position and the hydraulic motor is adjusted into the minimum intake position.

Abstract: An internal combustion engine may be driven in the suction mode as well as the supercharging mode. Switchover from the suction to the supercharging mode takes place with the accelerator pedal in a switchover position, and switchback to the suction mode is effected in the return switching position of the accelerator pedal. The switchover and switchback positions are offset with respect to each other with the accelerator pedal in a central position between its initial position and its final position. The arrangement is such that the switchover position is reached at the end of the suction mode at fully open throttle flap (full power position). Upon switchover the throttling of the supercharging flow (throttling begin position) is increased as compared to the end of the suction mode. This throttling of the supercharging is diminshed by further actuation of the accelerator pedal in the direction of the final position.

Abstract: A "comprex" supercharger, which has a rotor formed along its whole periphery with a plurality of axial cells wherein air introduced into the cells for supply to an internal combustion engine is compressed by engine exhaust gas introduced into the cells, is controlled by a control system such that a drive means for the rotor is controlled by an electronic control unit in response to output from engine operating condition sensors to control the rotational speed of the rotor so as to achieve optimum supercharging pressure to operating conditions of the engine.

Abstract: Supercharger control apparatus for the internal combustion engine of a motor vehicle comprises a control device which has as input signals the demand signal for acceleration (such as a signal based on the amount of throttle valve opening) and an engine rotational speed signal. Based on predetermined ranges of demand signal for acceleration and engine rotational speed and on the input signals, the control device regulates, through an actuator and bypass valve or through an actuator and variable capacity compressor, the amount of supercharging. The supercharge control apparatus allows a non-supercharged state, a maximum supercharged state, or an intermediate supercharged state. In the intermediate supercharged state, the amount of supercharging is in incremental steps to prevent hunting.

Abstract: A supercharger includes a compressor system which is driven through an electro-magnetically actuated variable slipping wet clutch to supply boost to an engine in the form of compressed air according to load requirements. Apparatus and methods are disclosed for supplying boost to the engine by varying the drive torque via the clutch system to the compressor system.

Abstract: Each cylinder is surrounded by four annular channels. The first three annular channels are in communication with the interior volume of the cylinder through a plurality of spaced apart openings and with a transfer channel connecting the opposite ends of the interior volume of the cylinder. The fourth annular channel is in communication with the interior volume of the cylinder through a plurality of spaced apart openings and with the exhaust pipe. The transfer channel has its wall formed with a plurality of spaced apart apertures therethrough, these apertures being distributed lengthwise of the transfer channel, such that they put the transfer channel in communication with the intake pipe, the apertures being provided each with a one-way low-inertial inlet device for allowing a high rate air flow to be aspirated into the cylinder with substantially no flow back towards the intake pipe.