Variable valve gear
A transmission device and valve technology, which is applied in the direction of valve devices, engine components, machines/engines, etc., can solve problems such as complicated device configuration, and achieve the effect of avoiding interference
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Embodiment approach 1
[0062] [Configuration of the variable valve train]
[0063] Below, refer to Figure 1 to Figure 3 The basic configuration of the variable valve train 10 according to Embodiment 1 of the present invention will be described.
[0064] figure 1 It is a perspective view showing the configuration of the variable valve train 10 according to Embodiment 1 of the present invention. figure 1 The illustrated variable valve train 10 is a device for driving valves of an internal combustion engine. Here, the internal combustion engine is configured as an inline four-cylinder engine. exist figure 1 Among them, #1 to #4 represent the first cylinder to the fourth cylinder of the internal combustion engine, respectively. The explosion sequence of this internal combustion engine is the same as that of a general internal combustion engine, and is #1→#3→#4→#2. In the present embodiment, the variable valve train 10 functions as a device that drives the intake valves of the cylinders. figure 1...
Embodiment approach 2
[0102] Next, refer to Figure 8 Embodiment 2 of the present invention will be described.
[0103] The system of this embodiment can use Figure 1 to Figure 3 and Figure 5 Shown hardware configuration and makes ECU40 execute the following Figure 8 The degrees shown are achieved.
[0104] [Characteristics of Embodiment 2]
[0105] In the case where the abnormal state generated by the variable valve actuator 10 is a state in which the power supply to the motor is completely cut off, by adopting the above-mentioned Figure 5 In the configuration shown, the cam 18 and the like are rotated by the reaction force of the valve spring, thereby reliably avoiding interference between the valve 12 and the piston. However, depending on the abnormal state, instead of the state where the power supply is completely off, the state where the force of the motor-driven cam 18 remains may be used. In this state, the cam 18 pushes the valve 12, the driving torque of the motor to the camshaft...
Embodiment approach 3
[0113] Next, refer to Figure 9 to Figure 11 Embodiment 3 of the present invention will be described.
[0114] Figure 9 It is a diagram for explaining the configuration of the torque reduction mechanism 52 included in the variable valve train 50 according to Embodiment 3 of the present invention. More specifically, Figure 9 (A) is a view showing the variable valve train 50 viewed from the axial direction of the camshaft 22, Figure 9 (B) means from Figure 9 (A) is a view of the variable valve train 50 viewed from the direction of the arrow A. exist Figure 9 , against the above figure 1 The same reference numerals are assigned to the same elements as the shown constituent elements, and descriptions thereof are omitted or simplified.
[0115] The variable valve gear 50 of the present embodiment has, in addition to Figure 9 Except for the torque reduction mechanism 52 shown, it has the same configuration as the variable valve train 10 of the first embodiment describe...
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