Estimation of the EES parameter value – a case study of the Toyota Yaris Hybrid
Abstract
Motor vehicles undergo plastic deformation as a result of colliding with each other or with another obstacle, which leads to a loss of the system's kinetic energy. The work of permanent deformation of a vehicle involved in a collision is equal to the loss of kinetic energy and is often represented as the value EES, i.e., Energy Equivalent Speed. This article describes three well-known and commonly used methods for estimating the value of deformation work: comparative, analytical, and graphical methods. The later section presents the calculation of the EES parameter using a comparative approach for a hybrid passenger vehicle struck by a motorcycle. Possible differences in estimating the value of the EES parameter have been indicated using this method for standard and hybrid vehicles.
Fields of Study & Subjects
Automotive and Human Injury Biomechanics
Transportation Safety and Impact Analysis
Mechanical Engineering and Vibrations Research
Publication details
- Journal / source
- Silniki Spalinowe/Combustion Engines
- Publisher
- Polish Scientific Society of Combustion Engines
- Volume
- 207
- Issue
- 4
- Pages
- 43-48
- Publication date
- 15 April 2026