Calibration issue

http://news.yahoo.com/s/afp/20100204/ts_alt_afp/uscompanyautofordsafety

"We have received reports that some drivers have experienced a different brake feel when the hybrid's unique regenerative brakes switch to conventional hydraulic braking," Ford said.

"While the vehicles maintain full braking capability, customers may i initially perceive the condition as loss of brakes."

个人理解是regenerative braking 太aggressive (这是MPG能上去的一个重要原因）.

Prius 的brake问题可能稍微复杂点：他们的控制没有考虑到extreme 情况（bumpy， icy road)