37results about How to "Promote lightweight development" patented technology

The invention discloses a chassis of a full-aluminum carriage. The chassis of the full-aluminum carriage comprises a bottom edge frame, sub longitudinal beams and transverse beams, wherein the bottom edge frame comprises four edge frame beams which are connected with each other to form a rectangle, wherein the two parallel edge frame beams are transverse edge frame beams; and the other two edge frame beams are longitudinal edge frame beams; at least one the sub longitudinal beam is arranged in the bottom edge frame; the two ends of the sub longitudinal beam are connected with a transverse edge frame beam in an inserted way; at least one transverse beam is arranged in the bottom edge frame; the two ends of the transverse beam are connected with a longitudinal edge frame beam in an inserted way; each transverse beam is connected with each sub longitudinal beam in an inserted way at the crossed part; and the edge frame beams, the sub longitudinal beams and the transverse beams are all made of aluminum alloys. According to the invention, as the beams are connected with each other in an inserted way, the carriage framework forms an integrated structure so that the carriage obtains enough rigidity and strength to satisfy loading requirements. According to the invention, as the sub longitudinal beams are connected with the transverse beams in an inserted way, the end parts of the sub longitudinal beams are inserted in the transverse edge frame beams and the end parts of the transverse beams are inserted in the longitudinal edge frame beams, the chassis forms an integrated structure so that the chassis obtains enough rigidity and strength to satisfy loading requirements of the carriage.

The invention discloses automobile beam steel with 960 MPa yield strength and a production method thereof. The automobile beam steel comprises the following chemical components in percent by weight: 0.12-0.14 percent of C, 0.15-0.35 percent of Si, 1.2-1.5 percent of Mn, 0.02-0.04 percent of Nb, 0.3-0.5 percent of Mo, 0.08-0.15 percent of V, 0.01-0.04 percent of Ti, 0.01-0.06 percent of Al, 0.4-0.6 percent of Cr, 0.0015-0.0025 percent of B, less than or equal to 0.02 percent of P, less than or equal to 0.01 percent of S, less than or equal to 0.008 percent of N, and the balance of Fe and inevitable impurities. C and Mn with low content are adopted, the separation strengthening effects of V, Nb and Ti are sufficiently utilized, and besides, a certain amount of Mo, a certain amount of Cr and a certain amount of B are added to control the heat treatment structure state, so that a fine and uniform tempering structure is obtained, the steel has high toughness, high welding performance and high low-temperature impact toughness, the safety performance of a vehicle is improved, the light-weight development of the vehicle is facilitated, and the technical problems that in the prior art, since the low-temperature impact toughness of steel is low, the potential safety hazards of a vehicle are caused, and the lightweight development of the vehicle is limited since the strength of the steel is low.

The invention discloses a polypropylene composite material automobile water tank cross beam and a preparation method thereof, and belongs to the field of composite materials. The water tank cross beam includes the following components by the mass percentage: 40%-80% of polypropylene, 0%-30% of a toughening agent, 5%-60% of a fiber reinforcement body, 0.3%-0.5% of an antioxidant, 0%-1% of a color master batch and 0.5%-3% of a compatibilizer. The preparation method of the water tank cross beam comprises the steps: extruding the above components by a double-screw extruder, granulating, and then carrying out injection molding through an injection molding process to obtain the polypropylene composite material automobile water tank cross beam. The prepared water tank cross beam is smaller in density, better in rigidity and better in impact performance, the weight of the water tank cross beam is significantly reduced, weight reduction of an automobile body is facilitated, and the technical indexes of the water tank cross beam are met. With adopting of the polypropylene material, the cost is lower, the processing technology is simple, molding is easy, and the production economy and efficiency of the water tank cross beam are improved.

The invention discloses a control method for an air conditioning system of an electric automobile. The air conditioning system comprises a compressor, a heater and a draught fan. The air conditioning system has a standby state and a working state. In the working state, the air conditioning system has a refrigerating mode, a heating mode and a natural air mode. In the refrigerating mode, the compressor runs, and the heater is stopped. In the heating mode, the compressor is stopped, and the heater runs. The draught fan runs in both the refrigerating mode and the heating mode to blow the refrigerated air or heated air into a cab of the electric automobile. In the natural air mode, the compressor and the heater are both stopped, and the draught fan runs to blow air. By the adoption of the control method of the embodiment, the energy consumption and the system running cost of the electric automobile are reduced, the weight of a storage battery can be reduced, and the miniaturization and lightweight development of the electric automobile is facilitated as well.

The invention discloses a design method of a pressure pulsation attenuator integrated in a constant pressure variable pump, the steps are as follows: Step 1: determine the design target. Determine the working condition characteristics of the design object in the hydraulic system; Step 2: Match the pressure pulsation attenuator with the constant pressure variable pump, including flow matching, pulsation amplitude matching and pulsation frequency matching; Step 3: Determine the volume of the pressure pulsation attenuator cavity ; Step 4: Determine the geometric shape of the pulsation attenuator cavity; Step 5: Optimize the volume for matching working conditions; Step 6: Strength check and experimental verification. The method of the invention can directly attenuate the pulsation at the pulsation source without affecting other pipeline systems, has better attenuation effect, compact structure, and can reduce the volume of the entire hydraulic system. In the whole design process of the pressure pulsation attenuator, the present invention comprehensively uses theoretical calculation, one-dimensional and three-dimensional simulation and experimental verification methods to verify each other, which can improve the design quality and accuracy, and make the designed pressure pulsation attenuator model more feasible .

The invention discloses a design and calculation method for the wall thickness of a steel valve body of an industrial valve, which belongs to the field of industrial valve design. The present invention overcomes the deficiencies in the prior art, and provides a new design and calculation method to calculate the wall thickness of the valve body, which includes the following steps: first calculate the wall thickness of the base valve body and the branch roads outside the bifurcation area, and then calculate the The wall thickness of the fork area; according to the shape characteristics and forming methods of the basic valve body and branch, different calculation methods are used to obtain the initial wall thickness; the wall thickness of the bifurcation area is calculated and checked by force balance, based on The pressure load area and the compensated effective metal cross-sectional area size determine the wall thickness in the bifurcation region. The invention comprehensively considers the shape and forming method of the valve body, thereby making the design of the valve more reasonable, reducing the wall thickness of the valve body, reducing the weight of the valve body, improving the existing design method of the valve body, and promoting the lightweight development of the valve , which has scientific guiding significance for guiding valve design calculations.

The present invention proposes a charging control method and system for an electric vehicle, and the electric vehicle. The method includes the following steps: detecting the voltage of the storage battery; judging whether the voltage of the storage battery is lower than the first preset voltage; if so, sending the battery low voltage to the user terminal Voltage reminder information and automatic charging request; after receiving the automatic charging instruction fed back by the user terminal, control the charging device to charge the battery. The present invention can send a reminder message and a charging request to the user when the voltage of the vehicle battery is too low, thereby facilitating timely replenishment of battery power, avoiding power loss caused by long-term parking of the vehicle, greatly facilitating the user, and requiring low cost and improving user experience.