EVAPORATED FUEL PURGE DEVICE

• US 20130008413A1
• Filed: 06/26/2012
• Published: 01/10/2013
• Est. Priority Date: 07/05/2011
• Status: Active Grant

• Current Assignee: DENSO Corporation, Hamanako Denso Company Limited (DENSO Corporation)
• Original Assignee: DENSO Corporation, Hamanako Denso Company Limited (DENSO Corporation)
• Inventors: Sugihara, Shinji, INOGUCHI, Tetsunori
• Granted Patent: US 9,086,036 B2
• Time in Patent Office: Days
• US Class Current: 123/518
• CPC Class Codes: F02B 29/0406 Layout of the intake air cooling or coolant circuit
• CPC Class Codes: F02B 37/00 Engines characterised by provision of pumps driven at least for part of the time by exhaust
• CPC Class Codes: F02M 25/0836 Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold

Abstract

An evaporated fuel purge device integrally includes a main passage, a fuel inlet passage, a fuel outlet passage, an ejector, an air inlet passage, and an air outlet passage. Evaporated fuel flows into the main passage through the fuel inlet passage, and flow out of the main passage through the fuel outlet passage. Intake air flows into the ejector from a downstream of a turbocharger through the air inlet passage, and flows out of the ejector to an upstream of the turbocharger through the air outlet passage. At least three of the fuel inlet passage, the fuel outlet passage, the air inlet passage, and the air outlet passage are arranged to extend parallel with each other.

Claims

1. An evaporated fuel purge device that purges fuel evaporated from a fuel tank to an engine having a turbocharger, the device comprising:

a main passage through which the evaporated fuel passes;

a fuel inlet passage through which the evaporated fuel flows into the main passage;

a fuel outlet passage through which the evaporated fuel flows out of the main passage;

a valve disposed in the main passage to open or close the main passage;

a branch passage branched from the main passage at a position downstream of the valve in a flowing direction of the evaporated fuel;

an ejector having a drawing portion that is connected with the branch passage;

an air inlet passage through which intake air flows into the ejector from a downstream of the turbocharger in a flowing direction of the intake air; and

an air outlet passage through which the intake air flows out of the ejector to an upstream of the turbocharger in the flowing direction of the intake air, wherein

the ejector is arranged between the air inlet passage and the air outlet passage in the flowing direction of the intake air, the intake air passing through the drawing portion, the drawing portion drawing the evaporated fuel from the branch passage using the intake air passing through the drawing portion,

the fuel inlet passage, the fuel outlet passage, the main passage, the valve, the branch passage, the air inlet passage, the air outlet passage, and the ejector are integrated with each other, and

at least three of the fuel inlet passage, the fuel outlet passage, the air inlet passage, and the air outlet passage are arranged to extend parallel with each other in an extending direction.

2. The evaporated fuel purge device according to claim 1, wherein

all of the fuel inlet passage, the fuel outlet passage, the air inlet passage, and the air outlet passage are arranged to extend parallel with each other in the extending direction.

3. The evaporated fuel purge device according to claim 1, further comprising:

a first check valve disposed in the main passage at a position between the fuel outlet passage and a branch point from which the branch passage is branched from the main passage, wherein

the first check valve restricts the evaporated fuel from flowing the fuel outlet passage to the fuel inlet passage.

4. The evaporated fuel purge device according to claim 1, further comprising:

a second check valve disposed in the branch passage, wherein

the second check valve restricts the evaporated fuel from flowing from the air inlet passage to the fuel inlet passage.

5. The evaporated fuel purge device according to claim 1, wherein

an overall dimension of the air inlet passage, the air outlet passage, and the ejector in the extending direction is set smaller than an overall dimension of the fuel inlet passage, the fuel outlet passage, and the main passage in the extending direction.