HYBRID WORKING VEHICLE

• US 20090199553A1
• Filed: 01/30/2007
• Published: 08/13/2009
• Est. Priority Date: 08/02/2006
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Nishimura, Satoru, Hiraki, Hikosaburou
• Granted Patent: US 8,037,963 B2
• Time in Patent Office: Days
• US Class Current: 60/486
• CPC Class Codes: B60K 2001/003 with means for cooling the electrical propulsion units
• CPC Class Codes: B60K 6/20 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
• CPC Class Codes: E02F 9/0866 Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
• CPC Class Codes: E02F 9/2292 Systems with two or more pumps

Abstract

An engine room is divided into a left room and a right room by a cooling unit. An intake chamber is disposed at a left side and an engine and the like are disposed at a right side. A cooling heat sink is provided on a side of the intake chamber, and a storage and a controller for controlling hybrid electronic devices are formed in this order in a cooling heat sink. Further, a cooling pump for supplying cooling liquid to the cooling heat sink is provided in the intake chamber. A radiator for cooling the cooling liquid is provided in front of the cooling unit.

Claims

1. A hybrid working vehicle in which an engine is transversely disposed, comprising:

a power unit including the engine, a generator-motor and a main hydraulic pump, the generator-motor and the main hydraulic pump being disposed in the engine; and

a storage for storing electric power generated by the generator-motor provided on at least one of a side close to the engine of the power unit and a side close to the main hydraulic pump of the power unit,

wherein the power unit is provided between a partition for partitioning a front portion of the hybrid working vehicle and an engine room from each other and a wall of a counterweight facing to the engine room.

3. The hybrid working vehicle according to claim 1, further comprising:

an electronic unit in which the storage and a controller for controlling a motor drive of the hybrid working vehicle are integrated together, wherein

the electronic unit is provided in a lateral portion on at least one of the side close to the engine of the power unit and the side close to the main hydraulic pump of the power unit.

4. The hybrid working vehicle according to claim 3, wherein:

the electronic unit has a liquid-cooling structure in which cooling liquid cools the storage and the controller in this order.

5. The hybrid working vehicle according to claim 4, further comprising:

a cooling pump for supplying the cooling liquid to the electronic unit, wherein

the cooling liquid discharged from the cooling pump circulates in the cooling structure by passing through a cooling heat sink formed in the storage, passing through the controller, passing through a swing motor that swings an upper swing body relative to a lower traveling body, returning to a radiator, being cooled down by the radiator, and subsequently being sucked by the cooling pump.

6. The hybrid working vehicle according to claim 4, wherein:

a cooling pump for supplying the cooling liquid to the electronic unit is provided in an engine room.

7. The hybrid working vehicle according to claim 6, wherein:

the electronic unit or an assembly of the electronic unit and the cooling pump is supported by a buffering member.

8. The hybrid working vehicle according to claim 6, wherein:

the cooling liquid for cooling the electronic unit circulates through a radiator, and the radiator is provided on an upper stream side of a flow of cooling air relative to a cooling unit having a cooling device on a hydraulic line including the engine.

9. The hybrid working vehicle according to claim 8, wherein:

the radiator is provided between the electronic unit and the cooling unit.

10. The hybrid working vehicle according to claim 3, further comprising:

a radiator for cooling the electronic unit to form an electronic unit,

wherein the radiator and a cooling device such as an oil cooler on a hydraulic line are integrated together as a cooling unit.

11. The hybrid working vehicle according to claim 10, wherein:

the power unit, the electronic unit and the cooling unit are horizontally arranged in parallel.

12. The hybrid working vehicle according to claim 1, wherein:

an electronic unit is provided in a space surrounded by a main frame, a side frame, a middle frame, and a rear frame, which form an upper swing body frame.

14. The hybrid working vehicle according to claim 10, wherein:

a shroud and a wind tunnel are provided between the cooling unit and the engine in this order from an upper stream side of a cooling air, and a cooling fan is provided in the wind tunnel such that a part of the cooling fan is exposed at a side close to the engine.

2. (canceled)

13. A hybrid working vehicle comprising:

an engine provided to be orthogonal to a main frame along a front-rear direction of the vehicle;

a generator-motor and a main hydraulic pump provided in the engine;

a cooling unit having a cooling device on a hydraulic line including the engine;

a storage that stores electric power generated by the generator-motor;

a controller that controls a motor drive of the hybrid working vehicle;

a radiator that cools the storage and the controller; and

a cooling fan that generates cooling air to blow the cooling unit and the radiator,

wherein the storage and the controller, the radiator, the cooling unit, the cooling fan, the engine, the generator-motor, and the main hydraulic pump are arranged in this order from an upper stream side of the cooling air.