To establish an accurate fuel consumption prediction model of heavy-duty diesel vehicles, this paper firstly used the dataset collected by heavy-duty diesel vehicles in real road driving, and Pearson correlation coefficient to calculate the correlation between different factors and fuel consumption, then selected 7 factors with strong correlation with fuel consumption, and used Back Propagation (BP) neural network and Long Short-Term Memory (LSTM) neural network to establish fuel consumption prediction models for heavy-duty diesel vehicles. The prediction results of different driving sections show that the prediction accuracy of BP neural network for fuel consumption values in different road sections differs sharply, and the generalization of the model is low, while the prediction of different road sections of the LSTM model is very accurate, and the model generalization is strong.

To realize the coordinated control of the flow pressure of the air subsystem for Proton Exchange Membrane Fuel Cell (PEMFC), this paper applied the fuzzy control principle and the Mamdani inference method to reason the control rules of fuzzy decoupling control, to design the fuzzy decoupling composite controller with MAP feedforward control. Finally, the comparison test with the fuzzy PID controller and the supplementary environment adaptation test were carried out. The results show that the fuzzy decoupling controller can achieve better control effect and has good environmental adaptability with flow control error less than ±3 g/s, and pressure control error less than ±10 kPa.

Current Time Of Flight (TOF) camera products have problems such as small viewing angle, and inability to consider all passengers in the front row. To address this issue, this article proposed a design method for TOF cameras, which solved the heat dissipation problem through thermal design simulation, and effectively expanded the camera’s Field Of View (FOV) through optical design and simulation of the TOF camera lens. At the same time, a complete design verification test was conducted to verify the performance of the TOF camera product. The results show that the system fully realizes the functions of the TOF camera, cover the passengers in the front row with a large FOV, and meets the performance requirements of the automotive grade.

This article analyzed the technical requirements of hydrogen sensors used in fuel cell vehicles, and studied the working principles, characteristics of various vehicular hydrogen sensors, compared the performance and parameters of mainstream hydrogen concentration sensors at present, summarized and analyzed the current development status of hydrogen concentration sensors. The technical development trend of hydrogen concentration sensors was predicted based on industry development needs.

In order to solve the problem that steering electric control system cannot be validated in road simulation test, this paper proposed a road simulation test bench test scheme of the steering system to verify the accuracy of the steering system based on the automobile road simulation durability test technology and the principle of automobile bus communication. Firstly, the control circuit of the steering system was built in the road simulation test bench; Then, the bus tool software was used to output the control signal of the steering system controller into the steering system according to time sequence; Finally, the effectiveness of the test scheme was verified by the strain of the steering system and the torque signal of the steering wheel. The result shows that the method enables to activate the EPS function in the traditional test rig.

The odor of four types of leather fabrics for vehicles was evaluated, and the odor substances were tested by Thermal Desorption Gas Chromatography Odor detector/Mass Spectrometry (TD-GC/OMS), and the sources of main odorants were further analyzed. The research shows that the odor substances of leather fabrics mainly come from the solvents, additives and related reaction products used in the processing, and part of them come from the volatilization of leather fabrics itself.

For the selection of vehicle trumpet based on vehicle test, there are problems of operation lag and affecting the progress of mass production of models. To address this issue, this paper proposed a trumpet near-field sound pressure simulation method based on Ray Tracing. Firstly, the hard wall panel data on the external surface of a vehicle was extracted, and Ray Tracing model solution model was established in VAOne, then the sound power of the trumpet was obtained by the inverse matrix module that was loaded into the Ray Tracing solution model to calculate the near-field sound pressure. The near-field sound pressure of trumpet simulation was compared with the test results, the result shows that the calculated near-field sound pressure value of trumpet is in good agreement with the experimental value, which can provide basis for vehicle trumpet selection in the early stage of model development.

To achieve the coupling analysis of the flow field, temperature field, and structural field of the intercooler, Computational Fluid Dynamics (CFD) and thermal strain test methods were used to conduct coupling analysis and experiments on the flow field, temperature field, and stress field of the intercooler using a fluid thermal structure coupling method. The flow field structure, temperature, and stress distribution of the intercooler were obtained. The analysis results show that this method can effectively predict the flow field and temperature field of the intercooler.

In order to ensure that the automotive generator can meet the power supply requirements under different operating conditions of the vehicle, the influence of the parameters of the automotive AC generator stator assembly on the rated power and output characteristics of the generator was analyzed and verified. The results show that, under the condition of stator core size specifications unchanged, the rated power can be increased without changing the slot filling rate and reducing the number of turns, but the output power can be reduced under low-speed conditions. Changing from star connection to triangle connection or adding a neutral point can increase the rated power without changing the low-speed output power. Changing the three-phase armature winding to six phases hardly affects the rated power and output characteristics, but can reduce the ripple peak value of the output current.

In response to the lack of research on the performance, standards, and testing methods of Intelligent Speed Assistance (ISA) system for motor vehicles in China at present, this paper introduced the working principle of ISA, studied the typical test scenarios specified in EU 2021/1958. On this basis, a motor vehicles’ ISA performance testing system and scenario were developed and a road test of a passenger car’s ISA performance was carried out according to the standard. The results indicate that the test vehicle’s ISA system complies with the requirements of EU 2021/1958 and the higher the vehicle speed, the later the ISA system will recognize the speed limit sign and when developing ISA systems attention should be paid to the sensitivity of the ISA system to recognize the speed limit sign when the speed is high.