Hybrid vehicle
A hybrid vehicle and engine technology, applied to hybrid vehicles, motor vehicles, power plants, etc., can solve problems such as mechanical oil pump stop, and achieve the effect of suppressing traction shock
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Embodiment 1
[0071] figure 1 It is a schematic system diagram showing the drive system of the hybrid vehicle and its overall control system of the first embodiment. figure 1 The hybrid vehicle is equipped with an engine 1 and an electric motor 2 as power sources, and the engine 1 is started by a starter motor 3 . The engine 1 is drive-coupled to drive wheels 5 via a V-belt continuously variable transmission 4 so that they can be disconnected appropriately.
[0072] The speed change mechanism CVT of the continuously variable transmission 4 is a V-belt type consisting of a primary pulley 6, a secondary pulley 7, and a V-belt 8 (annular flexible member) wound between these two pulleys 6 and 7. Stepless speed change mechanism. In addition, the V-belt 8 adopts a structure in which a plurality of elements are restrained by an endless belt, but it may be a chain system or the like, and is not particularly limited. The primary pulley 6 is connected to the crankshaft of the engine 1 through a to...
Embodiment 2
[0208] Next, Example 2 will be described. Since the basic structure is the same as that of Embodiment 1, only the different points will be described. Figure 16 It is a flowchart showing the operation process of the electric oil pump in the second embodiment. In Embodiment 1, the actual hydraulic state in the hydraulic circuit is detected, and the operation start of the electric oil pump EO / P is judged. In contrast, Embodiment 2 is different in that when there is a transition request from the HEV mode to the EV mode, as shown in step S210, the operation of the electric oil pump EO / P is performed immediately, and thereafter, In step S22, the engine 1 is switched from on to off. In other words, the electric oil pump EO / P is operated before the engine 1 is stopped.
[0209] Figure 17 It is a time chart showing the operation processing of the electric oil pump in the second embodiment. In this way, since the electric oil pump EO / P is operated before the engine 1 is stopped, ...
Embodiment 3
[0214] Next, Example 3 will be described. Since the basic structure is the same as that of Embodiment 1, only the different points will be described. Figure 18 It is a flowchart showing the electric oil pump stop process of the third embodiment. In Embodiment 1, the actual hydraulic state in the hydraulic circuit is detected to determine the stop of the electric oil pump EO / P. In contrast, Embodiment 3 is different in that when there is a transition request from the EV mode to the HEV mode, as shown in step S310, a non-operation command of the electric oil pump EO / P is immediately issued, which Then, in step S32, the engine 1 is switched from off to on. In other words, the electric oil pump EO / P is stopped before the operation of the engine 1 .
[0215] Figure 19 It is a timing chart showing the electric oil pump stop processing of the third embodiment. In this way, because the operation of the electric oil pump EO / P is stopped before the engine 1 is started, although t...
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