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 (280Kb)
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| Ken-ichi Shimizu | |
| Head, Energy Eco-Use System Div., Dept. of Energy Engineering | |
| Mechanical Engineering Lab., AIST, MITI | |
| 1-2 Namiki, Tsukuba, Ibaraki 305-8564, Japan | |
| Tel: +81-298-61-7062 Fax: +81-298-61-7275 | |
| E-mail: shimiken@mel.go.jp |
9,471,000 Yen
(FY 1999; 2,950,000 Yen)
The energy spent by actual urban traffic is usually estimated by the simulation based on the result of mode economy test conducted under pre-determined special conditions. The test results have two drawbacks; one is resultant error caused by test methods, and the other is the gap between the test conditions and actual driving conditions.
Concerning test errors, following facts are clarified: Due to the light road load and heavy weight of EVs, inertia simulation error of chassis dynamometer affects the total accuracy of the scheduled-mode-driving test. And, newly developed hybrid electric vehicles require new test mode with braking conditions similar to actual driving conditions to simulate the regenerative braking effect in its intelligent braking system.
Concerning test conditions, it is clarified that the test procedure should be modified to estimate the influence of air conditioner on vehicle total economy. And we also clarified the effect of road gradient on energy economy of 3 type EVs, namely pure EV, parallel HEV and series HEV, by numerical simulation.
Electric Vehicle, Energy Economy, Hybrid Vehicle