Federal Motor Vehicle Safety Standards; Hydraulic and Electric Brake Systems; Passenger Car Brake Systems

요약

This document responds to two petitions for reconsideration of amendments we made in September 1997 to Federal Motor Vehicle Safety Standards Nos. 105 and 135 specifying requirements for brake systems on electric vehicles (EV). In response to the petition by Hydro-Quebec of Canada, we are allowing the use, under certain conditions, of a regenerative braking system (RBS) for EV testing in accordance with S7.7 of Standard No. 135. This action is taken to facilitate new technology in the braking system of an EV. We are not amending Standard Nos. 105 and 135 in response to the petition for reconsideration by Toyota Motor Sales USA Inc. Amending the Standards as requested by Toyota may degrade the safety of EVs by reducing the stringency of the thermal tests.