| 摘要 |
<P>PROBLEM TO BE SOLVED: To continuously suppress catalyst degradation in catalyst degradation suppressing control, even though the number of revolutions of an internal combustion engine is forcibly reduced. <P>SOLUTION: When a fuel cut condition is met and catalyst degradation suppressing control is requested in a power output device (YES at S150), a second upper limit quantity of air is computed; if the absolute value of a torque command Tm1* for a motor MG1 exceeds the absolute value of a threshold value Tref, and the number Ne of engine revolutions is being reduced (YES at both S190 and S192). The second upper limit quantity of air is larger than a first upper limit quantity of air obtained by adding a predetermined amount of padding to a target intake air quantity for autonomous operation at the engine revolutions Ne of this time. Then, a control signal is transmitted to an engine ECU so that explosive combustion is executed within the range that the actual intake air quantity does not exceed the second upper limit quantity of air (S196). Thus, when the engine revolutions Ne is forcibly reduced by the motor MG1, the possibility is increased that explosive combustion is continuously executed. As a result, a catalyst constituting a purifying device is hardly degraded. <P>COPYRIGHT: (C)2007,JPO&INPIT |
