Development of “idling stop system” for small-size motorcycles

An advanced system aimed to reduce fuel consumption and exhaust emissions by means of an automatic engine stop, while the vehicle is stopped due to a traffic signal, traffic jam, etc.

Crea Scoopy-i
Ever since its inception, Honda has been conscious of environmental protection, as evidenced by the challenges for application of 4-stroke engines in Honda products. Shifting to 4-stroke engines for all Honda motorcycles, including scooters, to reduce fuel consumption while assuring clean exhaust gases, Honda introduced the new-generation 4-stroke scooter in 1999. While maintaining fundamental performance, this scooter became the benchmark in terms of environmental protection by reducing CO and HC emissions approximately 50% below the 1998 Domestic Exhaust Emission Regulations. Also fuel consumption was decreased by approximately 30% from the previous models. All this was achieved by applying the latest 4-stroke engine technologies. Additionally, the newly developed “idling stop system” was employed to minimize idling, further decreasing fuel consumption, exhaust emissions, vibration, and noise. When compared to models without the “idling stop system”, fuel economy improved by 5.1%. In 2001, the “Crea Scoopy-i” was introduced as the first 50cc scooter equipped with a water-cooled 4-stroke engine, which is lightweight and has an outer-rotor-type ACG starter. Coupled with the use of the “idling stop system”, the fuel economy improved by 5.5%* while reducing CO2 emissions by 5.2%, CO by 8%, and HC by 2% without an additional emission control system.

*Tested using domestic exhaust emission measurement mode (city-driving) designated by Ministry of Transport
 “Crea Scoopy-i” equipped with “idling stop system”

Smart Dio Deluxe
 “Smart Dio Deluxe” equipped with “idling stop system”


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