| 摘要 |
PURPOSE: A negative pressure generator of a parallel hybrid electric car is provided to increase an energy efficiency by supplying a negative pressure by an intake when an engine operates and supplying by a vacuum pump when a motor operates. CONSTITUTION: A vacuum pump(15) generates a negative pressure. A pipe switch valve(20) supplies/intercepts a negative pressure generated by an intake manifold. A negative pressure generation switch(30) selectively operates the vacuum pump(15) and the pipe switch valve(20) to switch a negative pressure device. A vehicle controller(40) operates the vacuum pump(15) through the negative pressure generation switch(30). The vehicle controller(40) closes the pipe switch valve(20) so that the vacuum pump(15) provides a negative pressure to a pipe device(12). The vehicle controller(40) stops the vacuum pump(15) through the negative pressure generation switch(30). The vehicle controller(40) opens the pipe switch valve(20) to supply a negative pressure generated in an intake manifold of an engine(5) to the pipe device(12). |
