Daihatsu has managed to reduced the cost of its stop/start system by 70%. The new system is installed in the new Move (earlier post), called "eco IDLE", and its mass has been reduced as well from about 10kg to 4kg.
"In order to achieve the reduction in cost and mass, the number of parts had to be reduced. The old system, as used as in the Mira, consisted of a battery, starter, dedicated ECU (electronic control unit), hydraulic brake holding system, electric hydraulic pump for its CVT, electric double layer capacitor that prevents the instantaneous drop of voltage at start-up and so forth.
The new one, uses the same battery and starter, but Daihatsu eliminated the electric hydraulic pump, replaced the capacitor with a DC-DC converter integrated with the ECU, embedded the hydraulic brake holding system in the ABS (antilock brake system) in place of a dedicated solenoid valve.
"In order to achieve the reduction in cost and mass, the number of parts had to be reduced. The old system, as used as in the Mira, consisted of a battery, starter, dedicated ECU (electronic control unit), hydraulic brake holding system, electric hydraulic pump for its CVT, electric double layer capacitor that prevents the instantaneous drop of voltage at start-up and so forth.
The new one, uses the same battery and starter, but Daihatsu eliminated the electric hydraulic pump, replaced the capacitor with a DC-DC converter integrated with the ECU, embedded the hydraulic brake holding system in the ABS (antilock brake system) in place of a dedicated solenoid valve.