Patent ID: 8210145
Filing Date: 2012-07-03
Classification: F02N,H02J,H02P

Abstract:
1. An engine start device comprising: a generator connected to a driving system of an engine; a starter connected to the driving system of the engine; a battery charged by the generator; an electric double layer capacitor connected between the starter and the battery; a DC/DC converter including: a controller coupled to the DC/DC converter; and a current-detecting means coupled to the controller, the current-detecting means for detecting current through one of the battery and the electric double layer capacitor, wherein the controller determines an internal DC resistance of the one of the battery and the electric double layer capacitor using the detected current from the current-detecting means, and wherein the controller controls a charging of the electric double layer capacitor by the DC/DC converter using the determined internal DC resistance so that a combined voltage of the battery and the electric double layer capacitor remains constant.