62results about How to "Reduced torque output" patented technology

A method for controlling a hybrid electric vehicle powertrain having an engine, a multiple-ratio transmission, a first electric machine and a second electric machine. On a power-on transmission downshift, electric wheel torque is used to compensate for a slow response of an engine to a request for increased traction wheel torque.

The invention provides a centrifugal pump with an impeller rotation boosting structure, the centrifugal pump comprises a motor, a pump body, an impeller, and a front end cover and a rear end cover at the front and rear sides of the impeller, the impeller is provided with a rear seal ring, the rear end cover is provided with a seal baffle ring which extends toward the impeller and covers at the periphery of the rear seal ring, a seal cavity is formed between the seal baffle ring of the rear end cover and the rear seal ring of the impeller, and the rear seal ring is provided with a plurality of slip sheets capable of slipping into the seal cavity. Compared with the prior art, through adopting the improved design of the end cover and the impeller of the centrifugal pump and utilizing the improved structures (such as the seal cavity and the slip sheets) between the seal baffle ring and the rear seal ring, pressure difference between a high pressure area and a low pressure area at two ends of the seal cavity is converted into power for pushing the impeller to rotate during the rotation of the impeller, so that the torque output of the motor is reduced.

A method for a vehicle traveling on the road, comprising of receiving a fuel mixture, said mixture having at least some alcohol, separating said fuel mixture into at least a first and second mixture on board the vehicle, where said first mixture has a higher alcohol concentration than said second mixture, delivering a first amount of said first mixture and a second amount of said second mixture to the engine in different ratios as an operating condition varies, and adjusting an engine operating parameter in response to availability of said first mixture.

Provide is a vehicle behavior control system that can achieve a rear wheel steering control demonstrating a high rate of response at all times without requiring the actuator for the rear wheels to be steered to be unduly increased. A control unit (20) for controlling the rear wheel steering angle is configured to reduce the effective stiffness of the rear wheel suspension systems while increasing the effective stiffness of the front wheel suspension systems when an increase in the road contact load of one of the rear wheels is detected or estimated. Thereby, an actuator (8) for the rear wheel is enabled to steering the rear wheels without involving any undue time delay with a minimum power requirement.

The application discloses a rack end protection method of an electric power steering system. When a rack of a steering gear moves towards the end of the rack and enters a rack end protection area, an ECU (electronic control unit) of the electric power steering system takes a rotating angle of a steering wheel, the speed of the rotating angle and rotating torque as input to calculate a rack end protection gain value which serves as a multiplier during assisting torque calculation. The rack end protection gain value is the product of a basic gain coefficient, a rotating speed gain coefficient and a rotating torque gain coefficient. The basic gain coefficient decreases progressively as the absolute value of the rotating angle of the steering wheel increases. The rotating speed gain coefficient decreases progressively as the absolute value of the rotating angle of the steering wheel increases. The rotating torque gain coefficient increases progressively as the absolute value of the rotating angle of the steering wheel increases. According to the rack end protection method of the electric power steering system, during working conditions of rack ends, current output can be limited, temperature rise can be reduced and mechanical impact of the rack ends can be avoided.

A bottom hole assembly 10 for drilling a deviated borehole includes a positive displacement motor (PDM) 12 or a rotary steerable device (RSD) 110 having a substantially uniform diameter motor housing outer surface without stabilizers extending radially therefrom. In a PDM application, the motor housing 14 may have a fixed bend therein between an upper power section 16 and a lower bearing section 18. The long gauge bit 20 powered by the motor 10 may have a bit face 22 with cutters 28 thereon and a gauge section 24 having a uniform diameter cylindrical surface 26. The gauge section 24 preferably has an axial length at least 75% of the bit diameter. The axial spacing between the bit face and the bend of the motor housing preferably is less than twelve times the bit diameter. According to the method of the present invention, the bit may be rotated at a speed of less than 350 rpm by the PDM and / or rotation of the RSD from the surface.

An engine torque control system for balancing torque output across cylinders of an internal combustion engine includes a first module that determines a derivative term for each cylinder of the engine based on rotation of a crankshaft. A second module determines a torque correction for a first cylinder based on an average derivative term associated with the first cylinder. The second module adjusts a torque output of the first cylinder based on the torque correction and adjusts a torque output of a second cylinder based on the torque correction.

An engine starting apparatus is provided with: a target torque setting device for setting a sum of a cranking base torque for cranking an engine and a vibration controlling torque for suppressing vibration of a power transmission system due to resonance of a damper, as a target torque to be outputted by a motor in cranking the engine; and a motor controlling device for controlling the motor to output the set target torque. The target torque setting device has a base torque controlling device for setting the cranking base torque to a first torque value if the number of revolutions of the engine is less than or equal to predetermined number of revolutions of the engine and for controlling the cranking base torque.

A method is disclosed for controlling a hybrid electric vehicle powertrain having a multiple-ratio transmission. On a power-on transmission downshift, electric wheel torque is used to compensate for a slow response of an engine to a request for increased traction wheel torque.

A fluid flow torque generator unit is composed of an impeller assembly, a housing, and a supporting frame. The housing contains one half of the impeller assembly and is configured to divide the force of the oncoming fluid flow into three components which work together to increase the force on the front of the impellers and to create a suction effect on the back of the impellers increasing torque output. One unit powering an electric generator can produce sufficient electricity for residential or commercial use. One unit or multiple units working together can be incorporated into an assembly that includes a source of compressed air to provide an air flow when the wind subsides, insuring a continuous output of electricity. The basic unit operates equally well in response to underwater currents. The dimensions and number of units are determined by the fluid flow source and the desired output.

Various systems and methods are disclosed for carrying out combustion in a fuel-cut operation in some or all of the engine cylinders of a vehicle. Further, various subsystems are considered, such as fuel vapor purging, air-fuel ratio control, engine torque control, catalyst design, and exhaust system design.

The invention provides a hybrid electric vehicle engine torque control method and system and a vehicle. A torque-based engine fuel injection control obtains a driver required torque according to a driver required torque map based on an accelerator pedal opening degree and an engine rotating speed; a motor power assisting control obtains a motor assistance torque value according to a motor assistance torque map based on a battery SOC value and a motor rotating speed. Under the high-power required working conditions such as vehicle starting acceleration or high-speed uphill and rapid acceleration overtaking, the actual torque output of the engine is reduced through the increase of the motor assistance torque value, and finally the real driver required torque is obtained. The fuel injection quantity of an engine is obtained through a torque and fuel injection quantity map, and the torque output and fuel injection quantity of high-power required working conditions such as vehicle startingacceleration or high-speed uphill and rapid acceleration overtaking are reduced through the assistance of the motor; the method and system can achieve the fuel saving purpose, and ensure the stable operation of the vehicle.

A powertrain system is configured to transfer propulsion torque to a driveline of a vehicle. A method for controlling the powertrain system includes determining a magnitude of unintended vehicle motion based upon a difference between a change in actual vehicle acceleration and a change in an operator-intended vehicle acceleration. Propulsion torque to the driveline is limited when a fault associated with unintended vehicle motion is detected and the magnitude of unintended vehicle motion is less than a predetermined first threshold.

An Advanced Uniflow Rankine Engine (“AURE”) that is effective and thermodynamically efficient at higher speeds (e.g., 400-1800 rpm) and has low torque output. This allows the AURE to be compact of size without the need for a massive foundation found in prior art steam engines. The AURE includes an admission valve assembly, a cylinder head / valve gear assembly, a cylinder / piston assembly, a crank shaft assembly, an external sump, and an integral condenser. The admission valve assembly includes a counterbalancing poppet valve and valve stem that creates counterbalanced unsupported areas that allow the poppet valve to operate at higher speeds. The AURE can be fueled by raw, unprocessed fuel, including biomass, to generate efficient energy in a smaller overall package.

According to the present invention, torque controllability may be improved in a situation in which there is a gap between a required torque and a current torque based on a supercharge delay of a supercharger when calculation of a target throttle divergence using an air reverse model is applied to a supercharged internal combustion engine. Although the control unit of the present invention usually determines the required torque as a target torque, the control unit determines a value lower than the current torque when a reduction direction change occurs in the required torque while there is the gap between the required torque and the current torque. Desirably, the control unit determines a target torque reduction correspondingly to a decrease in the required torque, and determines a target torque reduction subtracted from the current torque as the target torque. The control unit calculates a target air volume from the determined target torque, and calculates the target throttle divergence by using the air reverse model and based on the target air volume.

Systems and methods for operating a hybrid vehicle driveline that includes an engine and a motor are presented. In one example, the systems and methods include one or more speed control modes where torque output of a motor is adjusted responsive to different control parameters in the different control modes.

The invention discloses a gas engine operation method under the low gas pressure condition. The method comprises following steps that an engine runs; according to the rotating speed of the engine, the maximum injection pulse width allowable under the current condition, driving torque needed by a driver, the maximum gas flow allowable under the current condition and the maximum air inlet amount A allowable under the current condition are calculated according to the rotating speed of the engine; according to the calculated driving torque needed by the driver, an air inlet amount B is obtained through calculation; the maximum air inlet amount A allowable under the current condition and the air inlet amount B are compared, and through the small value of the maximum air inlet amount A and the air inlet amount B, an air inlet amount C is obtained; and according to the air inlet amount C, a needed gas flow and a needed injection pulse width are calculated. When the current gas pressure is low, through the slow control over the air inlet amount, the torque output of the engine is slowly reduced; and through active adjusting, the air amount is reduced so as to reduce the torque output, the condition that the torque is suddenly reduced is prevented from appearing, vehicle flameout and shaking are avoided, and safe and stable driving is ensured.

A control apparatus includes a torque-boost control portion that boosts torque output from the engine, and corrects the operation amount of an adjustment mechanism that adjusts the amount of air taken into the engine to increase the amount of air during a torque phase when the automatic transmission upshifts; and an inertia-phase determination portion that determines whether an inertia phase has started. The torque-boost control portion includes a torque-boost end control portion that executes a torque-boost end control that gradually decreases a correction amount, by which the operation amount is corrected, to zero when the inertia-phase determination portion determines that the inertia phase has started.

The invention discloses a six-degree-of-freedom force feedback teleoperation master manipulator with gravity compensation. The six-degree-of-freedom force feedback teleoperation master manipulator comprises a fixed base and further comprises a waist joint mechanism, a shoulder joint mechanism, an elbow joint mechanism, a big arm mechanism, a small arm mechanism, a small arm rotary connecting mechanism and a wrist joint mechanism which are mounted on the fixed base, a big arm gravity compensation mechanism is arranged on the big arm mechanism, and a small arm gravity balance mechanism is arranged on the small arm rotary connecting mechanism. The joint mechanisms are provided with encoders and driving motors so as to achieve six-dimensional target pose information input and feedback force output in teleoperation information flow. The gravity interference of the teleoperation force feedback master manipulator in the movement process is counteracted in an elastic gravity compensation and gravity balance mode, the torque output and load of a joint motor are reduced, and transparency of force feedback can be achieved. The master manipulator has the advantages of being simple in structure, large in working space, high in system rigidity and capable of outputting large feedback force.

A control device for an electric vehicle where a threshold storing unit is provided which stores two large and small thresholds and (first threshold>second threshold), and a drive state switching unit is provided which reduces torque output of a drive motor, while allowing accessories to operate, when a remaining energy capacity SOC from a remaining energy capacity detecting unit fails below the first threshold, and stops power supply to the drive motor, while allowing the accessories to operate, when the remaining energy capacity SOC from a remaining energy capacity detecting unit falls below the second threshold.

The invention discloses an ice-making machine. The ice-making machine comprises a ice-making machine assembly which comprises a support and an ice cube tray installed rotatably on the support and an ice turning assembly which comprises a reduction casing, a worm, a turbine and a motor, wherein the worm and the turbine are arranged in the reduction casing and are engaged with each other; the turbine is connected to the ice cube tray to drive the ice cube tray to turn; and the motor is connected to the worm to drive the worm to turn. Based on the ice-making machine provided by the embodiment of the invention, through utilization of the characteristics of a high transmission ratio and a high load capacity between the worm and the turbine, low-rotate speed and high-torque output is realized in the case that energy remains the same. Therefore, the ice-making machine provided by the embodiment of the invention has a simple structure and a low cost. The invention also discloses a refrigerator with the ice-making machine.

Systems and methods for improving transmission shifting of a hybrid vehicle are presented. In one example, output torque of an electric machine is adjusted in response to a downshift of a fixed step ratio transmission during regenerative braking. The output torque of the electric machine may be adjusted in response to a phase of the transmission shift.

A watercraft and associated pedal drive system are provided. The pedal drive system allows for unassisted manual pedaling to provide thrust to the watercraft. The pedal drive system also provides on demand pedal assistance of varying levels via an assist drive train having an electric motor to supplement the manual pedal force input provided by a user at the pedals of pedal drive system.

A watercraft and associated pedal drive system are provided. The pedal drive system allows for unassisted manual pedaling to provide thrust to the watercraft. The pedal drive system also provides on demand pedal assistance of varying levels via an assist drive train having an electric motor to supplement the manual pedal force input provided by a user at the pedals of pedal drive system.

A torque request module is configured to, while a vehicle speed is greater than a predetermined speed, decrease a torque request in response to a first signal from a start / stop switch being in a first state continuously for greater than a first predetermined period and less than a second predetermined period. A control module is configured to, as the torque request decreases, decrease torque output of at least one of an engine and an electric motor. A light control module is configured to: selectively turn exterior hazard lights on and off in response to a second signal from a hazard light switch being in a first state; and selectively turn the exterior hazard lights on and off in response to the first signal from the start / stop switch being in the first state continuously for greater than the first predetermined period.

The current invention is a high speed, two-stroke engine that is counter flow, semi-uniflow, or uniflow and is comprised of at least one variable rotary valve mechanism.

An engine and a step up-down converter are controlled such that a counter-electromotive voltage of a first motor becomes higher than direct current-side voltages of a first inverter and a second inverter and thereby torque for forward travel is output from the first motor to a driving shaft through a planetary gear set, when an accelerator is on during specified travelling with gates of the first inverter and the second inverter being cut off and the engine being operated. The engine and the step up-down converter are controlled such that the rotational speed of the first motor becomes smaller and the voltage of the high voltage-side electric power line becomes lower when the accelerator is off than when the accelerator is on during the specified traveling.