US 11,655,782 B2
Valve device
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. 17/879,177.
Claims priority of application No. JP2021-128439 (JP), filed on Aug. 4, 2021.
Prior Publication US 2023/0041903 A1, Feb. 9, 2023
Int. Cl. F02M 26/52 (2016.01); F02M 26/22 (2016.01); F02M 26/70 (2016.01)
CPC F02M 26/52 (2016.02) [F02M 26/22 (2016.02); F02M 26/70 (2016.02)] 11 Claims
OG exemplary drawing
 
1. A valve device configured to increase or decrease 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, and a downstream passage connected downstream with respect to the first upstream passage and the second upstream passage;
a bypass valve body that 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; and
an interlocking portion that interlocks the bypass valve body with a rotational operation of the EGR valve body, wherein
a first case is defined as the EGR valve body rotating around the EGR valve axis from a reference rotational position, which is predetermined, to one side,
a second case is defined as the EGR valve body rotating around the EGR valve axis from the reference rotational position to an other side,
the EGR valve body is configured such that a relationship between a rotation amount from a reference rotational position, which is predetermined, and an opening degree of the downstream passage is same in a first case where the EGR valve body rotates around the EGR valve axis from the reference rotational position to one side and a second case where the EGR valve body rotates around the EGR valve axis from the reference rotational position to an other side, and
the interlocking portion has a structure configured to interlock an opening degree of the second upstream passage with the opening degree of the downstream passage in a non-linear relationship when the second upstream passage and the downstream passage are open.