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US 2022/0065147 A1Published application
Exhaust Gas Processing Device
AssigneeMarelli Corporation
InventorsDaisuke Sugaya, Shunichi Mitsuishi, Takaharu Yamamoto, Satoru Yokoshima, Tooru Hisanaga, Daisuke Shimamura
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Abstract
In an exhaust gas processing device, an air-fuel ratio sensor is provided such that a measuring portion is located in a region surrounded by a downstream-side end surface of a TWC, an upstream-side end surface of a GPF, and an inner wall surface of a case against which the exhaust gas G that has passed through the TWC flows, that is the region a region on the GPF side of the center of the TWC.
Claims17
-20. (canceled)
An exhaust gas processing device comprising:
- a first catalyst carrier configured to clean exhaust gas flowing along a first direction;
- a second catalyst carrier configured to clean the exhaust gas that has passed through the first catalyst carrier, the exhaust gas flowing along a second direction intersecting with the first direction;
- a case configured to accommodate the first catalyst carrier and the second catalyst carrier;
- a sensor having a measuring portion for measuring the exhaust gas, the sensor being configured to determine the exhaust gas that has passed through the first catalyst carrier;
- an outer circumference flow path provided between an outer circumferential surface of the first catalyst carrier and an inner circumferential surface of the case, the outer circumference flow path surrounding an outer circumference of the first catalyst carrier;
- and
- a diverting portion formed by the case protruded inwardly, the diverting portion being configured to divert the exhaust gas that has passed through the first catalyst carrier so as to guide the exhaust gas towards each of the second catalyst carrier and the outer circumference flow path, wherein
- the measuring portion of the sensor is arranged in a region surrounded by a downstream-side end surface of the first catalyst carrier, an upstream-side end surface of the second catalyst carrier, and an inner wall surface of the case, the inner wall surface being configured to receive the exhaust gas that has passed through the first catalyst carrier, the region being on the second catalyst carrier side of a center of the first catalyst carrier,
- the measuring portion is arranged in a region in which the exhaust gas flows from the diverting portion towards the second catalyst carrier, and
- an angle formed by a top part of the diverting portion is from 70° to 120°.
7 more elements
Dependencies are inferred from the claim text.