| 主权项 |
1. A product comprising:
an engine breathing system valve (10) located in a passage (28, 32, 34, 40, 42, 43, 45, 55, 57) of an engine breathing system (12) to regulate fluid-flow in the passage (28, 32, 34, 40, 42, 43, 45, 55, 57), the engine breathing system valve (10) comprising: a valve body (60) having a port (66) and having a seating surface (68) lying along a cone outer surface (CS) of an imaginary cone (C), the imaginary cone (C) having a cone center axis (CA) which is at an acute angle (0) with respect to a center axis (CP) of the port (66) so that, in cross-section, an upper portion (78) of the seating surface (68) is at a different angle with respect to the port center axis (CP) than a lower portion (80) of the seating surface (68); a stem (62) rotatably carried by the valve body (60) at a location away from the seating surface (68), the stem (62) having an axis of rotation (R1) being radially offset from the port center axis (CP); a valve member (64) connected to the stem (62) to rotate about the stem (62), wherein the valve member (64) comprises a second seating surface (106), and wherein the valve member (64) is a single continuous component, the valve member (64) having a valve member plane (M) defined parallel to a valve face (94) of the valve member (64) and being, when in a closed position, axially offset from the axis of rotation (R1); wherein the valve member (64) has a boss (98) extending away from a valve rear face (96), the boss (98) defining a passage (100) therein for receiving the stem (62), and a retaining pin (102) is inserted into the boss (98) and into the stem (62) to connect the stem (62) to the valve member (64); and wherein a clearance (104) is defined between an outer surface (82) of the stem (62) and an inner surface of the passage (100), the clearance (104) accommodating relative thermal expansion and contraction between the stem (62) and the boss (98). |
