US 12,247,532 B2
Valve device
Shogo Tateishi, Kariya (JP); Yuichiro Moritani, Kariya (JP); and Hideki Hayashi, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Aug. 2, 2022, as Appl. No. 17/879,206.
Claims priority of application No. 2021-128440 (JP), filed on Aug. 4, 2021.
Prior Publication US 2023/0043144 A1, Feb. 9, 2023
Int. Cl. F02M 26/54 (2016.01); F02M 26/26 (2016.01); F02M 26/70 (2016.01); F02M 26/72 (2016.01); F16K 31/524 (2006.01); F16K 31/53 (2006.01)
CPC F02M 26/54 (2016.02) [F02M 26/26 (2016.02); F02M 26/70 (2016.02); F02M 26/72 (2016.02); F16K 31/52441 (2013.01); F16K 31/535 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A valve device that increases or decreases a flow rate of EGR gas, the valve device comprising:
a housing that includes
a first upstream passage into which the EGR gas cooled by an EGR cooler flows,
a second upstream passage into which the EGR gas that bypasses the EGR cooler flows,
a junction connected to each of a gas-flow downstream of the first upstream passage and a gas-flow downstream of the second upstream passage, and
a downstream passage connected to the first upstream passage and the second upstream passage via the junction;
a bypass valve body that is provided in the second upstream passage and opens and closes the second upstream passage;
an EGR valve body that is provided in the downstream passage and rotates around an EGR valve axis to open and close the downstream passage;
a motor that rotationally drives the EGR valve body; and
an interlocking portion that interlocks the bypass valve body with a rotational operation of the EGR valve body, wherein
the motor and the bypass valve body are disposed opposite to each other with the junction between the motor and the bypass valve body,
wherein
the bypass valve body rotates around a bypass valve axis to open and close the second upstream passage,
the interlocking portion includes a cam that rotates with the EGR valve body and has a cam track, and a driven rotating portion that rotates with the bypass valve body and has a cam follower,
the driven rotating portion rotates in an interlocking manner with a rotational operation of the cam while causing the cam follower to follow the cam track,
the cam is fixed to an EGR valve shaft to integrally rotate with the EGR valve body around the EGR valve axis, and
the cam includes a cam through-hole.