The analysis of a possibility of construction of a START–STOP system based on an elastic type mechanical starter-accumulator

Jan Dzida,Jakub Dzida

doi:10.19206/ce-117172

Abstract

The paper presents research results of a combustion engine ignition start-up process for a city car with the use of a conventional electric starter-motor and with the use of rubber elastic components. The objective of the research work was to compare the ignition dynamics of both concepts and determine the necessary parameters for the rubber elastic components. The results of the performed research contain the course of torque; the energy and power needed for the ignition are shown on the diagrams. A comparison of these two systems shows that the use of the system with the elastic components having reasonable weight is sufficient enough for a reliable ignition and its mechanical parameters are similar to or even better than the electric starter-motor ignition. Positive results became the basis for the initiation of design works on a concept of a new mechanical START-STOP- system. The preliminary assumption as well as the concept of an integrated mechanical device that combines both the engine starter and the energy accumulator have been presented. The last paragraph describes possible advantages of the new START-STOP system, among which the most important are high energy and cost efficiency as well as its simplicity.

Highlights

The START-STOP systems serve the purpose of an automatic combustion engine shut-off during each vehicle stop if a predetermined time limit is exhausted and its restart when the driver intends to continue driving
The START-STOP systems, in hybrid drivetrain systems are classified as micro-hybrids due to a relatively low power output of the auxiliary power source
The co-author of the paper, for many years has been promoting the idea of a use of mechanical accumulators in hybrid vehicle systems

Summary

Introduction

The START-STOP systems serve the purpose of an automatic combustion engine shut-off during each vehicle stop if a predetermined time limit is exhausted and its restart when the driver intends to continue driving. The cited publications point to the necessity of repeated analysis of the feasibility of such type of accumulators in vehicles In spite of their disadvantages such as low mass density of energy storage, difficulties in control of the torque value in the loading and unloading stages and the presence of high peak values of the elastic tension, it is worth pointing to the important and forgotten advantages. Są dwa rodzaje takich akumulatorów: kinetyczne (inercyjne), które magazynują energię mechaniczną w postaci energii kinetycznej wirującego bezwładnika oraz typu sprężystego, które magazynują energię w postaci potencjalnej przez odkształcenie sprężystych elementów roboczych. Przy poszukiwaniu możliwości zastosowania mechanicznych akumulatorów energii typu sprężystego w hybrydowych układach napędowych szczególną uwagę zwraca problem rozruchu silnika. Że uzyskanie tych informacji z badań doświadczalnych pozwoli z dużą pewnością ocenić możliwość zbudowania mechanicznego systemu STOP–START, którego podstawowym zespołem będzie zintegrowany mechaniczny rozrusznik–akumulator

Badania doświadczalne

Final remarks

Findings

Uwagi końcowe