Operating method for a hybrid vehicle

Motor vehicles – Power – Electric

Patent

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180309, 60300, B60K 1304

Patent

active

055667740

ABSTRACT:
An operating method for a hybrid vehicle which has an electric motor for driving the vehicle and an internal combustion engine for power generation. Upon completion of the activation of a catalyst, the engine is operated in warm-up mode with a small throttle valve opening, and when the output of a water temperature gauge thereafter reaches a predetermined value and the warm-up operation has completed, the engine is operated with a large throttle valve opening for the power generation. Thus, the hybrid vehicle can enjoy improved exhaust gas characteristics and increased cruising range and power performances. If it is determined that the storage amount of a battery is smaller than a predetermined storage amount when a starter key is so operated as to stop the vehicle, an alarm lamp is lighted, thus informing the driver of engine operation, and the engine operation is continued until the predetermined battery storage amount is reached or a predetermine time elapses from the start of the engine operation, whereby the battery is reliably charged. Accordingly, the battery can be reliably charged with power necessary to start the vehicle, and the cruising range and power performances of the vehicle are improved.

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Lawrence et al., "Microprocessor Control of a Hybrid Energy System", Proceedings of the 24th Intersociety Energy Conversion Engineering Conference, vol. 2, Aug. 1989, pp. 737-741.

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