Encased engine generator

• US 4,622,923 A
• Filed: 02/25/1985
• Issued: 11/18/1986
• Est. Priority Date: 07/31/1984
• Status: Expired due to Fees

• Current Assignee: Yanmar Diesel Engine Co., Ltd. (Yanmar Holdings Co., Ltd.)
• Original Assignee: Yanmar Diesel Engine Co., Ltd. (Yanmar Holdings Co., Ltd.)
• Inventors: Yoshii, Masami, Nishimura, Akira, Yasui, Shigeharu
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Application Number:
  US06/705,293
• Time in Patent Office: 631 Days
• Field of Search: 123/2, 123/195 C, 123/198 E, 123/41.65, 290/1 B, 290/1 R, 181/212, 181/283, 220/85 S, 220/85 VS, 220/85 VR
• US Class Current: 123/2
• CPC Class Codes: F02B 1/04 with fuel-air mixture admission into cylinder
• CPC Class Codes: F02B 2063/046 Handles adapted therefor, e.g. handles or grips for movable units
• CPC Class Codes: F02B 2275/22 Side valves
• CPC Class Codes: F02B 63/04 for electric generators
• CPC Class Codes: F02B 63/048 Portable engine-generator combinations
• CPC Class Codes: F02B 75/16 Engines characterised by number of cylinders, e.g. single-cylinder engines F02B75/26 takes precedence
• CPC Class Codes: F02B 77/13 Acoustic insulation
• CPC Class Codes: F02D 29/06 peculiar to engines driving electric generators

Abstract

This invention relates to an encased engine generator having an air-cooled engine and a generator housed in a case approximately structured in a rectangular parallelepiped, wherein a fuel tank is provided along the upper surface of the case, an engine having a cooling fan at its side is disposed within the case beneath said fuel tank, a generator interlocked with said engine is disposed at the downstream side of the cooling air from said cooling fan, a silencer is disposed between said fuel tank and generator so that its outer circumference may be cooled by part of said cooling air, and operating parts such as engine operation knob necessary for operation and maintenance are provided on the wall of the case which encloses the remaining cooling air.

Claims

1. An encased engine generator having an air-cooled engine and a generator housed in a case approximately structured in a rectangular parallelepiped having a front and a rear, wherein a fuel tank is provided along the upper surface of the case, an engine having a cooling fan at its side is disposed within the case beneath said fuel tank, a generator interlocked with said engine is disposed at the downstream side of the cooling air from said cooling fan, a silencer is disposed in a rearward space between said fuel tank and generator so that its outer circumference may be cooled by part of said cooling air, and operating parts such as engine operation knob necessary for operation and maintenance are provided on the front face wall of the case which encloses the remaining cooling air while cooling and exhaust discharge occurs from the rear, away from the operator.

2. An encased engine generator having an air-cooled engine, generator and auxiliary units housed in a case approximately structured in a rectangular parallelepiped, wherein an air-cooled engine is disposed in the middle of the case, a generator and silencer are placed side by side, a cooling fan is disposed at one side of the engine, an air cleaner is disposed in the space at the low temperature side partitioned by the partitioning member provided on the outer circumference of the fan cover to cover the cooling fan, and the air intake hole of said air cleaner is opened toward the inside of the case.

3. An encased engine generator as set forth in claim 2, wherein the cover of said air cleaner is detachably fitted to the front side of the case.

4. An encased engine generator having an air-cooled engine and a generator housing in a case approximately structured in a rectangular parallelepiped, the case having at least one side plate provided with a louver, comprising a generator disposed at one side of the engine, a tubular cover to cover the outside of the generator, a cooling fan for drawing air in through the louver in the side plate of the case for cooling the generator, the fan being disposed in the tubular cover, a silencer within the case above the generator, a silencer cover disposed around the silencer and cooperating with the tubular cover to direct air around the silencer, the silencer cover further comprising a top element having an opening therein, the top element located below the fuel tank and separated from the fuel tank by a clearance which allows air passing out of the opening to enter the clearance and means for passing at least a portion of the air discharged from the cooling fan through the opening and into the clearance.

5. An encased engine generator as set forth in claim 4, wherein electrical parts of the generator are provided in the free space formed by the case side plate and the tubular cover inside which covers the outside of the generator.

6. An encased engine generator having an air-cooled engine with a cooling fan and a generator housed in a case approximately structured in a rectangular parallelepiped, wherein a fuel tank is provided along the upper surface of the case, an air-cooled engine is disposed in the case beneath said fuel tank, a generator is disposed at one side of the engine, a silencer is disposed between said generator and fuel tank, and an upper cover of the silencer is provided between the silencer and fuel tank at a clearance against the fuel tank, so that the cooling air from said cooling fan may be passed into the clearance between the upper cover and fuel tank.

7. An encased engine generator as set forth in claim 6, wherein said upper cover covers the cylinder head of the engine, and an opening is formed in the upper cover at the part to cover the cylinder head.

8. A fuel tank air bleeding device of an encased engine generator having an engine and a generator housed in a case approximately structured in a rectangular parallelepiped, wherein a fuel tank is provided along the upper surface of the case, a handle is provided above the fuel tank, large-diameter mouth rings project from the upper surface of the fuel tank and have an opening at the upper end, small-diameter connection pipes pass through openings of the mouth rings so that their lower ends may project into openings, a free space located between the bottom of the connection pipes and forming a fuel baffle in the mouth rings at said connection part.

9. A fuel tank air bleeding device of an encased engine generator as set forth in claim 8, wherein the upper end side passages of connection pipes are formed by flexible tubes extended in the handle.

10. In an encased air cooled engine generator having a case and a fuel tank, the improvement comprising a cooling duct within the case, the cooling duct having a tubular portion and a manifold, the tubular portion extending between the engine and a side panel and having disposed therein a generator and a generator cooling fan, the manifold adapted to receive air from the tubular portion and located above the generator and below the fuel tank, the manifold having an opening and having disposed therein a silencer for the engine, the manifold having a substantially parallel relationship with the fuel tank and separated from it by a clearance, wherein cooling air from the duct enters the clearance through the opening.

11. In an encased air cooled engine-generator having a case, a fuel tank, front, rear and side case panels, a top, a bottom and a handle, the improvement comprising, a cooling duct comprising a tubular portion and a manifold, the tubular portion extending from the engine to a side panel and having therein a cooling fan and a generator;

the manifold extending from the tubular portion and having an opening, the manifold having located therewithin a silencer, whereby air from the tubular portion flows over the generator and part of the air flow is diverted to the manifold where the air passes over the silencer and exhausts through a vent, the silencer exhausting through the rear panel, the manifold located above the center of the tubular portion and rearwardly, and below the fuel tank;

a narrow clearance separating the manifold from the fuel tank, whereby air from the manifold may enter the clearance through the opening, and the tubular portion affixed to the side panel snugly.

12. In an encased engine-generator having a case, a fuel tank and a hollow handle, the improvement comprising at least one spill proof vent comprising a cylindrical mouth ring upstanding on the top of the fuel tank, a smaller diameter connection pipe extending from the top of the mouth ring, a circumferential lip extending from the connection pipe downwardly into the mouth ring, a baffle space outlined by the space in the mouth ring external to the lip and between the lowermost extremity of the lip and the highest internal point in the mouth ring, whereby the lip and baffle space provide an impediment to the flow of fuel from the tank into the connection pipe, and a small diameter tube attached to the connection pipe and leading into the handle and extending substantially the length of the handle.

13. The improvement of claim 12, wherein two spill proof vents are provided, the small diameter tubes of each extending into different ends of the hollow handle.

14. In an encased air cooled engine-generator having a handle, the improvement comprising, an internal ducted generator, a silencer having a cooling manifold, the silencer exhausting to the rear of the engine generator, operator controls located on the front of the engine generator, and two spill proof vents each having an internal baffle and a drain tube, the drain tube extending within the handle, and the drain tubes being approximately the length of the handle.