49results about How to "Avoid setbacks" patented technology

The invention discloses a control method and a system of an automatic transmission of a van. The method comprises the steps of obtaining the current speed of the van; determining the required gear according to the speed and gear corresponding relation corresponding to different bearing capacities and the current speed of the van; and adjusting the gear to the current gear. The required gear is determined according to the speed and gear corresponding relation corresponding to the different bearing capacities and the current speed of the van, when the bearing capacities are changed, the applicable speed and gear corresponding relation is determined first, and then the current required gear is determined according to the applicable speed and gear corresponding relation and the current speed,so that the problem of the change of the gear application range because the load change to the van is difficult to satisfy by a transmission system is effectively solved, the appropriate gear can be selected by the control method so as to reduce oil consumption, and the service life of the transmission, a clutch and an engine are prolonged.

Embodiments of the present disclosure relate to a vehicle shifting method, apparatus, and vehicle. The gearshift method of the vehicle comprises the following steps: when the vehicle is in a running state, when a gearshift instruction is received, judging whether the current torque of the motor is greater than a preset torque; when the gearshift instruction is received, judging whether the currenttorque of the motor is greater than a preset torque; If the current torque of the motor is greater than a preset torque, controlling the motor to perform a torque reduction operation within a presettime period; A current gear of the vehicle is switched to a target gear according to the result information of a torque reduction operation performed by the motor within a preset time period. The technical solution provided by the embodiments of the present disclosure solves the problem that the prior art vehicles are prone to be frustrated during the shifting process.

A ratchet-type tensioner, comprising: a housing; a plunger supported by the housing for movement in opposite advancing and setback directions, the plunger having rack teeth provided thereon, and being arranged to advance with respect to the housing along the advancing direction for applying tension to a traveling transmission medium engaged with rotating members; and a ratchet mechanism capable of restricting the plunger from setting back due to a reaction force acting in a setback direction from the transmission medium; said ratchet mechanism comprising: a ratchet-receiving hole provided within the housing; a ratchet element slidable in the ratchet-receiving hole and movable in a sliding direction transverse to the advancing and setback directions; ratchet teeth on the ratchet element engageable with the rack teeth of the plunger; and a ratchet-biasing means for biasing the ratchet element in an engaging direction along the sliding direction so that the ratchet teeth engage with the rack teeth; said ratchet mechanism being capable of restricting the plunger from being set back by a reaction force acting in a setback direction from the transmission medium; said rack teeth having a concave-convex form and being composed of stop surfaces facing in the setback direction and sliding surfaces facing in the advance direction, said sliding surfaces being inclined relative to the sliding direction and facing in a disengaging direction opposite from the engaging direction; each of said sliding surfaces having an entry starting location which the ratchet teeth first engage when starting to enter the rack teeth, and an entry ending location where the engagement of the ratchet teeth with the rack teeth ends; each said sliding surface being a curved surface, all of said curved surface, between said entry starting location and said entry ending location of said sliding surface, bulging in the advancing direction of the plunger and in the disengaging direction of the ratchet element from an imaginary reference plane intersecting said entry starting location and said entry ending location of said sliding surface and perpendicular to another imaginary plane to which the advancing and setback direction of the plunger and the sliding direction of the ratchet element are parallel; and at least a part of said curve midway along said curve between the entry starting location and the entry ending location is convex.

A gait planning method for improving the walking stability of a six-legged robot. The method comprises: moving: lifting two non-adjacent legs, and initiating movement of the two legs along translation paths of the terminal ends of the legs, the translation paths being parallel to a line connecting a center of a body of the robot and a destination point, wherein during moving, there are always four legs contacting the ground and two non-adjacent legs being lifted, and joints of each leg are periodically rotated to corresponding predetermined angles, such that the terminal end of each leg is lifted up and lands on the translation path thereof; and turning: rotating a camera module of a head portion of the robot to a direction directly facing a target destination, and then performing the basic moving operation. By employing the method, the present invention prevents the robot from moving in a staggering, rigid or leaning manner, and enables a smooth and stable gait. In addition, upon rotating, only the head portion needs to be rotated rather than the body, thus enabling the robot to always move in a straight line facing forwards without twisting, and achieving fast change of the forward direction without moving the legs or fast movement toward a specified direction.

Embodiments of the present disclosure relate to a vehicle gear shifting method, device, and vehicle; wherein, the vehicle gear shifting method includes: when the vehicle is in a driving state, when a gear shift command is received, judging whether the current torque of the motor is greater than preset torque; if the current torque of the motor is greater than the preset torque, control the motor to perform a torque reduction operation within a preset duration; according to the result information of the motor performing a torque reduction operation within a preset duration, the The vehicle's current gear shifts to the target gear. The technical solution provided by the embodiments of the present disclosure solves the problem that the existing vehicle is prone to stuttering during gear shifting.

The invention discloses a drive control circuit, a drive control method, a circuit board and an air conditioner. The drive control circuit includes a switch assembly, a first inverter module and a switching transition assembly, and the three-phase winding is between a star connection state and a delta connection state. The inter-switching needs to switch the states of the first switch group and the second switch group respectively. By setting the switching transition component, the three-phase winding is provided with the second drive to keep the three-phase winding running before the switching of the first switch group and the second switch group. Voltage, so that after the first switch group and the second switch group are switched, the working state of the three-phase winding will not change, and the motor can still maintain stable operation to ensure smooth switching and avoid the three-phase winding being subjected to voltage shocks during switching. Frustration or braking to realize switching the connection state of the motor without stopping the machine.