Parallel hybrid vehicle descending safety auxiliary control test stand and test method thereof

Abstract

Based on a parallel hybrid vehicle descending safety auxiliary control idea, the invention provides a parallel hybrid vehicle descending safety auxiliary control test stand and a test method thereof. The test stand comprises a driver control unit, an execution unit, a sensing unit, a resistance simulation unit and a simulation control unit. A dynamometer, a torque meter, a flywheel, a brake disc,a gear case, a speed changer, a motor of a simulation engine form a rotation axis through a junction box. The simulation control unit is internally provided with a gradient data, vehicle drive and brake control module and a descending auxiliary motor, engine, hydraulic composite brake control module, and is connected with a computer and a driving filter circuit to control a test instruction. The invention relates to real-time change of motor brake, engine brake, hydraulic brake and simulation gradient resistance, dynamic characteristics of a motor, an engine, hydraulic composite brake of a hybrid vehicle are comprehensively reflected, and a reliable test platform is provided for exploitation and verification of a hybrid vehicle descending safety auxiliary control method.

Description

technical field [0001] The invention belongs to the field of brake control of hybrid electric vehicles, and in particular relates to a dynamic test bench and a test method for downhill safety auxiliary control of parallel hybrid electric vehicles. Background technique [0002] As a new type of vehicle developed under the increasing environmental and energy pressure, hybrid electric vehicle has become one of the research focuses in the automotive industry. The energy feedback characteristic of the motor braking of the hybrid electric vehicle improves the energy utilization rate of the hybrid electric vehicle and improves the economy; and the precise adjustability of the braking torque of the motor improves the control accuracy of the braking torque of the hybrid electric vehicle. At the same time, due to the above characteristics of the motor brake, the downhill safety auxiliary control of the hybrid electric vehicle (when sliding downhill, the vehicle is controlled by the EC...

AI Technical Summary

Problems solved by technology

However, the above-mentioned test methods have the following shortcomings: 1. The mathematical model cannot reflect the dynamic characteristics of the executive components such as the motor and the hydraulic mechanism, nor can it reflect the dynamic characteristics of the sensing components such as the brake, pressure sensor, and speed sensor; The static test platform only reflects the response characteristics of the hydraulic adjustment mechanism, and the other components of the test platform are static, without considering the dynamic characteristics of brakes, wheels, etc.; 3. The dynamic test platform with hydraulic system and motor system can be mixed Complicated dynamic braking tests such as the ABS of power vehicles, but neither the participation of the engine in the braking process nor the complete vehicle power transmission system (excluding the transmission) cannot be simulated. Real engine anti-drag braking, And there is no accelerator pedal signal during the braking process, so it is impossible to judge the driver's driving intention during the downhill process

Images