345 results about "Cruise speed" patented technology

This is an improvement of the 1968 Trailing Rotor V/STOL aircraft (Ref. 1). Rotors are mounted on wing-tip pods which can be tilted from the vertical to the horizontal aft position. Rotors are then stopped in the axial-flow condition and indexed to an azimuth position, aft of the wing trailing-edge. Rotor blades are then folded forward (blade-tips upstream of rotor-hubs) and locked into grooves in the tip-pods.

The main improvements over Ref. 1 are: a smaller shift of center-of-gravity during transition to cruise mode, and an easier task of locking blades into the tip-pods.

The main feature of the autorotative aft rotor tilt is that a soft-inplane rotor can be used, which reduces rotor weight. The blade-folding axis is also the blade-flapping axis.

The autorotative mode is used frequently by helicopters during descent. It has been found to be a good, stable mode with rpm-stability. During aft tilt on the UFR, the rotors provide pitching stability to the airframe. During stopping of the rotor, the stability of the autorotating rotor eases the task of passing thru rotor resonance.

Also, the wing can be swept back, which is desirable for 400 kt. cruise speeds and can be used for external stores such as fuel and weapons.

A hybrid fixed wing aircraft converts into a roadworthy vehicle in a matter of seconds therefore operating efficiently in both air and ground transportation systems. The single piece wing is mounted on a skewed pivot that is on the lower portion of the fuselage and is operated by a pushbutton operating system. The aircraft includes telescopic twin boom tail design that when extended allows good pitch stability and damping. The aircraft's wing area may be increased with additional telescopic wing tip segments. This allows an increase in aspect ratio, hence improving efficiency at high loads. This feature will also creates a reduction in induced drag at cruise speed by simply retracting the tips in flight. The vehicle has a unique synchronized control system that switches from flight to ground mode without input from the operator, thereby providing a natural interface for the operator.

A dual, coaxial rotor helicopter is provided that is relatively easy to fly. Thrust is provided by two ducted fans that are mounted at the rear of the aircraft and spaced apart laterally. Differential thrust generated by the fans provides yaw control for the aircraft, and forward thrust is provided by the fans working in combination. The coaxial rotors are preferably utilized primarily for lift, and not for forward thrust, which simplifies the control requirements. The coaxial rotor with ducted fan configuration also results in lower vibratory loads being imposed on the helicopter, thereby increasing its speed capability. The fan ducts serve to protect the fans, augment the fan thrust at low airspeeds, increase the efficiency of the fans at cruise speeds, and provide horizontal and vertical stabilizing surfaces to ensure aircraft flight stability.

The present invention is an electric vehicle power system that uses multiple permanent magnet motor/generators connected in series or parallel and multiple battery step switching. Motor, torque and speed are controlled by steps in series connection and then in parallel connection. Smooth acceleration, regeneration and current control are provided by delaying stepping from one battery step to the next until the next step is fully engaged. Transients are limited to the effect of one battery step by using rectifier shunt switching. Multiple motors provide acceleration torque at low speed in series connections and at cruising speeds in parallel connection. Regenerative deceleration is provided in the opposite manner. Battery depletion is averaged by flipping ends of a battery bank. Controls are provided with normal foot controls and a speed setter. A separate deceleration pedal or lever may be used.

A cruise control system for a motor vehicle includes a sensor for monitoring a target vehicle moving in front of the equipped vehicle, a sensor for monitoring the speed of the equipped vehicle and a sensor for monitoring steering manoeuvres of the equipped vehicle, the cruise control system controlling the throttle and brake systems of the vehicle to control the speed of the vehicle. The cruise control system is switchable between a cruise mode in which it will maintain a set cruising speed when the path in front of the vehicle is clear and a follow mode in which it will maintain a preset headway with a target vehicle in front of the equipped vehicle. The system is switched from the cruise mode to the follow mode when a target vehicle moves inside the preset headway, the system switching from the follow mode to the cruise mode when the target vehicle is lost or moves outside a preset headway. When switching from the follow mode to the cruise mode, the cruise control system applies a resume acceleration to accelerate the equipped vehicle back to the set cruising speed, the resume acceleration rate being adjusted as a function of steering manoeuvres carried out by the equipped vehicle.

A Vertical Take-off and Landing (VTOL) aerial vehicle (1, 46), e.g. a rotorcraft with long range and high cruising speed capability. The aerial vehicle (1, 46) has a torus-type fuselage (2) with radial inside a duct (5) and at least one main rotor (13, 26). A pair of lateral wings (40) are attached opposed to each other outside the fuselage (2) and at least one engine (18) drives said at least one main rotor (13, 26) and at least two propulsion means (24) fitted to each of said wings (40). The invention relates as well to a method of operating such a VTOL aerial vehicle (1, 46).

The invention discloses a cruise stage fuel consumption prediction method for aircraft mass change. The method comprises the following steps: step 1, considering the influence of mass change and crosswind, and constructing a cruise stage fuel consumption model; step 2, aiming at the model constructed in the step 1, establishing an objective function and constraint conditions; and step 3, solving the optimal solution of the objective function to obtain the optimal fuel mileage under each mass and the corresponding optimal cruise height and maximum cruise Mach number. According to the prediction method, a cruise fuel consumption prediction model based on aircraft mass change can be established, and the optimal cruise height and the optimal cruise speed corresponding to the maximum fuel mileage of different aircraft masses are determined through optimization calculation by the model.

The invention discloses a method and device for controlling vehicle cruise, and belongs to the technical field of vehicle electronic control. The method comprises the following steps of when a vehicleis detected to achieve a preset cruise condition, according to the cruise speed of the vehicle, determining the opening degree of a virtual accelerator pedal corresponding to the cruise speed; according to the opening degree of the virtual accelerator pedal and the current speed of the vehicle, determining a target wheel end torque of the vehicle; according to the target wheel end torque and a speed ratio signal of the vehicle, determining the engine torque of an engine and the motor torque of a motor in the vehicle; and adjusting the current torque of the engine to be the engine torque, andadjusting the current torque of the motor to be the motor torque, so that the purpose that the current speed of the hybrid vehicle is controlled to achieve the cruise speed, is realized.

A fuel-efficient automotive vehicle is provided having a power train including a primary internal combustion engine, an auxiliary engine, and a coupling system which selectively transfers power from the auxiliary engine to the primary engine when the speed of operation of the auxiliary engine equals the speed of the primary engine. The speeds of both engines are controlled by separate gas pedals conventionally located within the vehicle. The primary engine is of smaller power and better fuel efficiency than an engine which would generally be required by the vehicle. Although the primary engine can maintain the vehicle at a cruising speed, it relies upon the added power of the auxiliary engine for acceleration and hill-climbing.

A ship hull structure includes a main hull and a movable rearbody having an engine and a propeller. The movable rearbody is located at a lower side of a stern of the main hull, connected with an aft of the main hull to form an integral unit by a hinge linking device allowing the rearbody to pivot up and down. By a block, a crane or a winch and through a chain or a hanging wire, a pivoting angle of the movable rearbody with respect to the main hull can be adjusted and controlled. A bottom of the hull can be provided with at least one, usually plural, air cushion recess, which is filled with pressurized air to reduce a viscous force between a bottom of the ship and water. When a ship of this kind of structure is sailing, the rearbody can be lifted up by the block or the winch, allowing part of the propeller to be separated from a water surface to reduce resistance in the water that the engine can achieve a required rotational speed (RPM) in a short time. Next, the rearbody is laid down slowly, allowing the propeller to be put into the water, thereby increasing propulsion and quickly achieving a cruising speed. When the ship is sailing and encounters with wind wave, the stern will ascend by longitudinal pitching; at this time, the rearbody can descend by its own weight, with a hinge axis as a center, preventing the propeller to leave the water surface to rotate idly. On the other hand, when a bow ascends (that is, the stern descends), the rearbody will maintain a normal draught height by buoyancy of the water and the force between the water and running propeller Therefore, for the entire ship, a wetted surface area of the propeller can be adjusted automatically to keep at a best sailing condition, which can further save fuel consumption significantly. In another embodiment that the bottom of the ship is formed with the air cushion recesses, a friction force of the water can be reduced to increase a ship speed by the air cushion effect formed at the bottom of the ship.

The invention discloses an inclined fixed wing unmanned plane. The inclined fixed wing unmanned plane comprises a plane body and a wing inclined mechanism which can incline the wings, wherein the two sides of the plane body are provided with at least one pair of wings, and the tail of the plane body is also provided with a tail wing; and each wing is fixedly provided with a power device, each power device is connected with a screw propeller, the wings and the power devices are fixedly arranged together and can simultaneously move, and the rotation surfaces of the screw propellers are perpendicular to the horizontal planes of the wings all the time. The inclined fixed wing unmanned plane adopting the technical scheme can vertically take off and land and can realize high the cruising speed and power utilization efficiency and reasonable structure of a fixed wing plane; as the preferred technical scheme, the wings are both provided with subsidiary wings which are controlled by the wing inclined mechanism, and the power devices are all fixedly arranged on the middle parts of the wings; and the wings have enough rigidity and intensity, the wings are prevented from deforming because the power devices are fixedly arranged, and the localization of the wings is exact in revolution and fixation.

The invention discloses a vehicle cruise control method based on monocular vision and a system for realizing thereof. The methods comprises the following steps: a camera is fixedly arranged near a rearview mirror in front of a driver; a monocular image is obtained from the camera; segmentation and automobile detection is carried out for the image; if no car is in the front, a cruise speed is kept or restored and treatment of current frame image data is finished; if a car is detected in the front, distance and speed of the car are calculated; if the distance of the front car is less than the safe distance, appropriate braking is carried out through an automobile braking control system; or the treatment of the current frame image data is finished to switch to the treatment of next frame image data. The method is realized by a system which consists of the camera, an embedded calculation module, a displayer and a loudspeaker. The vehicle cruise control method has the advantages of high security, small calculation complexity, low requirement for hardware configuration, easy butch production and low cost.

A vehicle cruise control system is provided that comprises a vehicle speed detecting section, a cruise control section, and a cruising speed setting section. The vehicle speed detecting section is configured and arranged to detect a speed of a host vehicle. The cruise control section is configured to execute a first prescribed cruise control such that the host vehicle travels in a constant-speed state at a cruising speed setting when the host vehicle is traveling in a first prescribed speed region. The cruising speed setting section is configured to set the cruising speed setting when the host vehicle is traveling in a vehicle speed region other than the first prescribed speed region.

The invention provides a constant speed cruise control method and system. The constant speed cruise control method includes the steps that corrected output shaft rotating speed is determined according to the value of slope where a vehicle is located; if the current output shaft rotating speed is higher than or equal to the corrected output shaft rotating speed, the vehicle is in a pre-gear-shifting state; in the pre-gear-shifting state, if the target cruise speed, the current cruise speed, the speed state and the vehicle state meet preset conditions, the gear shifting operation is carried out according to the corrected output shaft rotating speed; in the pre-gear-shifting state, if the target cruise speed, the current cruise speed, the speed state and the vehicle state do not meet preset conditions, the gear shifting operation is canceled. The constant speed cruise control method and system can improve comfort of the vehicle during driving on a ramp in a constant speed cruise state.

The invention discloses a vertical take-off and landing aerocar and belongs to the field of aerocars. The aerocar is composed of a sports car type aerocar body (1), a lifting force generator (3) performing the vertical take-off and landing function, a front duck wing (6), a pair of three-level telescopic wings (5), a running tail wing (8) used for ground running, a gas compressor (12) of a gas source system, folding wing tails (23) and (24) used in flying in air, a suspension system (4) with three conversion modes, a tail plate (42) capable of being collected in an aerocar body, a flow guide plate (18) used for reducing resistance, a propelling fan (7) used for cruising and a whole aerocar parachute bin cover (13) used for improving safety. A power system of a car is adopted for pneumatic lifting force conversion to achieve vertical take-off and landing and aerial wing spreading, the requirements for the comfortableness and convenience of cars and the cruising speed and efficiency of flying are met, and especially, the aerocar can vertically take off and land in narrow urban areas.

The invention discloses a control method and device for a whole vehicle controller cruise system of an electric automobile, and the method comprises the following steps: reading cruise switching signals of the electric automobile, and judging whether the electric automobile enters into a cruise control mode by using an analog-to-digital conversion module of a microcontroller; reading messages regarding the whole vehicle dynamic information, and connecting a communication module of the microcontroller, subjected to level switch, with a communication interface of the whole vehicle controller to determine a cruise control method; connecting a cruise speed adjusting button with an universal input/output interface of the microcontroller by a filter circuit, and determining a cruise speed set value; connecting brake pedal signals with the analog-to-digital conversion module by a sampling circuit, and determining the brake information of a driver; and connecting accelerator pedal signals with the analog-to-digital conversion module by a sampling circuit, determining the accelerator pedal opening, and setting the cruise speed according to a control policy. By using the control method and device of the whole vehicle controller cruise system of the electric vehicle, the cruise system controlling can be run stably and efficiently, thus providing a hardware platform controlled by the cruise system for the whole vehicle controller, and compensating performance lack of the whole vehicle controller in the field of the cruise system controlling.

Provided are alternative hybrid transmission systems for marine, or two wheeled land vehicles, as well as propulsion systems and vehicles comprising such transmission systems, to improve various propulsion systems using a combination of at least two power sources with the option for simultaneous or alternating power input from two or more power sources, while providing desired characteristics or components. Such characteristics or components can include, but are not limited to: power, torque, acceleration, cruising speed or power, fuel efficiency, battery charging, endurance, power sizing, weight, capacity, efficiency, speed, mechanically and/or electrically added system requirements, design, fuel selection, functional design, structural design, lift to drag ratio, weight, and/or other desired characteristic or component.