Engine Device
AssigneeYanmar Power Technology Co., Ltd.
InventorMasataka Uchibori
Life of this patent
Estimating the term…
Abstract
An engine device 1 includes: an exhaust manifold 4 disposed on one of left and right sides of a cylinder head 2, and an intake manifold 3 disposed on the other of the left and right sides of the cylinder head 2; and a turbocharger 30 that uses fluid energy of an exhaust gas discharged from the exhaust manifold 4, to compress fresh air to be flowed into the intake manifold 3. The turbocharger 30 is constituted by a two-stage turbocharger including a high-pressure turbocharger 51 coupled to the exhaust manifold 4 and a low-pressure turbocharger 52 coupled to the high-pressure turbocharger 51. The high-pressure turbocharger 51 is disposed on one of left and right lateral sides of the exhaust manifold 4, while the low-pressure turbocharger 52 is disposed above the exhaust manifold 4.
Claims7
1-6. (canceled)
7:
- An engine device comprising:
- an exhaust manifold;
- an intake manifold arranged in a cylinder head;
- and
- a turbocharger for compressing fresh air to be introduced into the intake manifold by fluid energy of exhaust gas discharged from the exhaust manifold,
- wherein the turbocharger comprises a two-stage turbocharger including a high-pressure turbocharger provided on the exhaust side of the cylinder head and a low-pressure turbocharger communicating with the high-pressure turbocharger, the high-pressure turbocharger includes a high-pressure compressor and the low-pressure turbocharger includes a low-pressure compressor, and a fresh air outlet of the low-pressure compressor of the low-pressure turbocharger and a fresh air inlet of the high-pressure compressor of the high-pressure turbocharger open in the same direction and communicate with each other through a fresh air relay pipe.
8:
- The engine device according to claim 7, wherein the low-pressure compressor has a fresh air inlet that opens laterally with respect to the low-pressure compressor, and the fresh air outlet that opens laterally with respect to the low-pressure compressor after being protruded away from the low-pressure compressor.
9:
- The engine device according to claim 7, wherein the fresh air relay pipe is U-shaped.
10:
- The engine device according to claim 7, wherein the high-pressure turbocharger further including a high-pressure turbine is disposed laterally from the exhaust manifold, and the low-pressure turbocharger is disposed above the exhaust manifold, and the low-pressure compressor is disposed above the high-pressure turbine of the high-pressure turbocharger.
11:
- The engine device according to claim 10,
- wherein the low-pressure turbocharger further includes a low-pressure turbine, the high-pressure turbine has an exhaust inlet opening toward the exhaust manifold and an exhaust outlet opening toward the low-pressure turbine, and
- the low-pressure turbine opens with an exhaust inlet facing downward, and
- wherein the exhaust outlet of the high-pressure turbine and the exhaust inlet of the low-pressure turbine communicate with each other via an exhaust relay pipe.
12:
- The engine device according to claim 11, wherein the exhaust relay pipe is L-shaped.