Driving torque control method and system during downhill of electric vehicle and vehicle

Abstract

The invention discloses a driving torque control method and system during the downhill of an electric vehicle, a vehicle and a storage medium. The driving torque control method comprises the steps that S1, whether a torque control function is in an activated state during downhill is judged; s2, if so, information is acquired; s3, a first torque Trq1 is calculated; s4, when the whole vehicle is not in a sliding state or a braking state in the current calculation period and the first torque Trq1 is smaller than or equal to 0, the step S6 is executed, and otherwise, the step S5 is executed; s5, if the whole vehicle is in a sliding state or a braking state in the current calculation period and Trq1 is greater than or equal to Trq1thr, the step S7 is executed, and otherwise, the step S6 is is executed; s6, when the whole vehicle enters a sliding state or a braking state and the torque distribution function during downhill is in a Standby state, the method returns to S2 at the moment; s7, when the whole vehicle is not in the sliding or braking state, a second torque Trq2 is calculated; and s8, a third torque Trq3 is determined and the third torque Trq3 is sent to the torque execution system; and the method returns to S2. When the electric vehicle is in an acceleration or constant speed state and in a downhill state, the torque requirement of a driver can be met with less electric energy consumption.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle energy saving, and in particular relates to a driving torque control method, system, vehicle and storage medium of an electric vehicle when going downhill. Background technique [0002] The automobile industry is a key energy-saving field, and new energy vehicles are growing rapidly. At present, China is the country with the largest number of new energy vehicles in the world. How to make electric vehicles more energy-efficient is a key topic in the automotive field. At present, the most intuitive energy saving effect of electric vehicles is energy recovery or regenerative braking. [0003] For example, the patent document CN112848921A discloses a downhill method, device and vehicle for an electric vehicle. The present invention essentially proposes an energy recovery control method when the vehicle is in a downhill state, aiming to solve the problem when the electric vehicle is in a slid...

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Problems solved by technology

However, the above two methods are all discussing the energy recovery strategy when the vehicle is in a coasting or braking state, and do not involve how to maintain the vehicle in an acceleration or constant speed state with less power consumption, so as to make the energy-saving effect more effective. it is good

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