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 Control system for hybrid vehicle

Details
Inventors: Wakashiro, Teruo; Matsubara, Atsushi; Kitajima, Shinichi; Nakaune, Kan; Kayano, Morio; Watanabe, Kazunori;
Assignee: Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Swann; J. J.
Assistant Examiner: Lum; L.
Attorney, Agent or Firm: Armstrong, Westerman & Hattori, LLP

In vehicle operation under cruise mode, the battery, which is in a low temperature state, is caused to rise in temperature at an early stage, and the assistance amount and the regeneration power generation amount by means of the motor are caused to increase. During vehicle operation in cruise mode, in the case in which one or the other of the battery temperature and the engine water temperature have failed to reach a predetermined temperature, the cruise power generation amount is raised to a predetermined level, and charging of the battery is continued until both the battery temperature and the engine water temperature have reached predetermined temperatures. When a determination has been made that there is no further room in the battery to accept further charge, power generation and assistance is conducted by the motor so as to cancel periodic fluctuations in the drive force of the engine, and vibration damping control is conducted for suppressing vibrations generated by the engine in accordance with the fluctuations in the drive force of the engine.

DETAILED DESCRIPTION The present invention was created in light of the above circumstances; it has as an object thereof to provide a hybrid vehicle control system which is capable, during vehicle operation in the cruise mode, of raising the temperature of a battery which is at a low temperature in a short period of time, and increasing the assistance amount and the regenerated power generation amount of the motor.
In order to attain the object of solving the problems described above, in a first aspect of the present invention, a hybrid vehicle control system which is provided with: an engine which outputs the propulsion force of the vehicle; a motor which assists the output of the engine in accordance with the operational state of the vehicle; and an electricity storage device, which stores generated energy, when the motor is employed as a generator by the output of the engine, and regenerated energy, which is produced by the regenerative state of the motor when the vehicle decelerates, comprising: an electricity storage device temperature detector (in the embodiment described hereinbelow, step S102 and step S107) for detecting the temperature of the electricity storage device; an engine water temperature detector (in the embodiment described hereinbelow, step S105) for detecting the engine water temperature which is related to the temperature of the engine; and a power generation increasing device (in the embodiment described hereinbelow, step S103 or step S106) for increasing the amount of generated energy when the motor is used as a generator during vehicle operation by the drive force of the engine, without the output assistance of the engine by the motor in accordance with the operational state of the vehicle, either in the case in which the electricity storage device temperature is detected at or below a predetermined electricity storage device temperature by the electricity storage device temperature detector, or in the case in which the engine water temperature is detected at or below a predetermined temperature by the engine water temperature, detector



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