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Operating method for a hybrid vehicle
| Details |
Inventors: Yoshida, Masato;
Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Hurley; Kevin
Assistant Examiner: Yu; Min
Attorney, Agent or Firm:
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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DETAILED DESCRIPTION An object of the present invention is to provide an operating method for a hybrid vehicle provided with an electric motor used to drive the vehicle and an internal combustion engine for power generation, which method permits improvement of the cruising range and power performances of the vehicle, without abandoning an advantage of an electric vehicle having an excellent exhaust gas characteristics.
Another object of the present invention is to provide an operating method for a hybrid car, which can ensure the exhaust gas purifying effect of an exhaust gas purifier mounted on the vehicle, increase the cruising range, and improve the power performances of the vehicle.
A still another object of the present invention is to provide an operating method for a hybrid vehicle, which is capable of reliably maintaining the storage amount of a battery necessary to start vehicle running, and permitting the vehicle to have an increased cruising range and improved power performances.
According to one aspect of the present invention, there is provided an operating method for a hybrid car which has an electric motor for driving the vehicle, a battery for supplying electric power to the electric motor, a generator for charging the battery, an internal combustion engine operatively isolated from the electric motor and used to drive the generator, a starter for starting the internal combustion engine, and an exhaust gas purifier.
This method comprises the steps of: determining by a controller whether drive of the internal combustion engine is requested; detecting the temperature of an exhaust purifying catalyst of the exhaust gas purifier by means of a catalyst temperature sensor; and determining whether the detected temperature of the catalyst is lower than a predetermined value.
When it is determined that the drive of the engine is requested and that the temperature of the catalyst is lower than the predetermined value, a series of steps is executed under the control of the controller
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