Construction machinery

• US 20030132729A1
• Filed: 11/22/2002
• Published: 07/17/2003
• Est. Priority Date: 05/23/2000
• Status: Active Grant

• Current Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Original Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Inventors: Yoshimatsu, Hideaki
• Granted Patent: US 6,851,207 B2
• Time in Patent Office: Days
• US Class Current: 320/104
• CPC Class Codes: E02F 9/2012 Setting the functions of the control levers, e.g. changing assigned functions among operations levers, setting functions dependent on the operator or seat orientation
• CPC Class Codes: E02F 9/2075 of the hybrid type for vehicles in general B60W20/00
• CPC Class Codes: E02F 9/2095 Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans control of hydraulic driven equipment E02F9/22
• CPC Class Codes: E02F 9/2228 including an electronic controller
• CPC Class Codes: E02F 9/2292 Systems with two or more pumps
• CPC Class Codes: F15B 11/165 for adjusting the pump output or bypass in response to demand
• CPC Class Codes: F15B 11/167 using pilot pressure to sense the demand
• CPC Class Codes: F15B 21/087 Control strategy, e.g. with block diagram
• CPC Class Codes: F15B 2211/205 Systems with pumps
• CPC Class Codes: F15B 2211/20515 Electric motor
• CPC Class Codes: F15B 2211/20523 Internal combustion engine
• CPC Class Codes: F15B 2211/20561 reversible
• CPC Class Codes: F15B 2211/20584 Combinations of pumps with high and low capacity
• CPC Class Codes: F15B 2211/212 the pressure sources being accumulators
• CPC Class Codes: F15B 2211/30505 Non-return valves, i.e. check valves
• CPC Class Codes: F15B 2211/3051 Cross-check valves
• CPC Class Codes: F15B 2211/30525 Directional control valves, e.g. 4/3-directional control valve
• CPC Class Codes: F15B 2211/3056 Assemblies of multiple valves
• CPC Class Codes: F15B 2211/3111 the pump port being closed in the centre position, e.g. so-called closed centre
• CPC Class Codes: F15B 2211/3127 Floating position connecting the working ports and the return line
• CPC Class Codes: F15B 2211/3133 : Regenerative position connecting the working ports or connecting the working ports to the pump, e.g. for high-speed approach stroke
• CPC Class Codes: F15B 2211/31576 : having a single pressure source and a single output member
• CPC Class Codes: F15B 2211/327 : electrically or electronically
• CPC Class Codes: F15B 2211/329 : actuated by fluid pressure
• CPC Class Codes: F15B 2211/355 : Pilot pressure control
• CPC Class Codes: F15B 2211/45 : Control of bleed-off flow, e.g. control of bypass flow to the return line
• CPC Class Codes: F15B 2211/455 : Control of flow in the feed line, i.e. meter-in control
• CPC Class Codes: F15B 2211/46 : Control of flow in the return line, i.e. meter-out control
• CPC Class Codes: F15B 2211/50518 : using pressure relief valves
• CPC Class Codes: F15B 2211/5151 : being connected to a pressure source and a directional control valve
• CPC Class Codes: F15B 2211/63 : Electronic controllers
• CPC Class Codes: F15B 2211/6316 : the pressure being a pilot pressure
• CPC Class Codes: F15B 2211/6355 : having valve means
• CPC Class Codes: F15B 2211/6658 : Control using different modes, e.g. four-quadrant-operation, working mode and transportation mode
• CPC Class Codes: F15B 2211/67 : Methods for controlling pilot pressure
• CPC Class Codes: F15B 2211/7135 : Combinations of output members of different types, e.g. single-acting cylinders with rotary motors

Abstract

A hybrid construction machine according to the present invention is constructed to drive electric motors (6, 7, 13, 15, 23, 25) by means of power of a power generator (11) to be given by an engine (10), power of an auxiliary battery (42) and power of a main battery (12) charged with power of the power generation (11). The hybrid construction machine has a switch (43) for switching to drive the electric motors (6, 7, 13, 15, 23, 25) by means of power of at least one of the generator (11) and the main battery (12) when operating normally and to drive the electric motors (6, 7, 13, 15, 23, 25) by means of power of the auxiliary battery (42) when operating emergently such that the electric motors (6, 7, 13, 15, 23, 25) can not be driven by means of the normal power.

Claims

1. A hybrid construction machine constructed to drive electric motors (6, 7, 13, 15, 23, 25) by means of power of a power generator (11) to be driven by an engine (10), power of an auxiliary battery (42) and power of a main battery (12) to be charged with the power of the power generator (11), comprising:

a switch (43) for switching to drive the electric motors (6, 7, 13, 15, 23, 25) by means of normal power of at least one of the power generator (11) and the main battery (12) in a normal operation state and to drive the electric motors (6, 7, 13, 15, 23, 25) by means of auxiliary power of the auxiliary battery (42) in an emergent operation state that the electric motors (6, 7, 13, 15, 23, 25) can not be driven by means of the normal power

2. The hybrid construction machine according to claim 1, further comprising an actuator-selecting switch (54) for selecting at least one of the electric motors (6, 7, 13, 15, 23, 25) to be driven by means of the auxiliary power in the emergent operation state.

3. The hybrid construction machine according to claim 1 or 2, wherein the hybrid construction machine is a hybrid excavator.

4. A control apparatus of a hybrid construction machine for executing works by charging a main battery (12) with power of a power generator (11) to be driven by an engine (10) and driving electric motors (6, 7, 13, 15, 23, 25) by means of power discharged from at least the main battery (12), comprising:

a generator output control body (51) for varying power output from the power generator (11) in accordance with content of work.

5. The control apparatus of a hybrid construction machine according to claim 4, further comprising;

a manipulating lever (45) to be manipulated by an operator; and

a work determination body (46) for determining the content of work on the basis of manipulating signal from the manipulating lever (45) and outputting the content of work to the generator output control body (51).

6. The control apparatus of a hybrid construction machine according to claim 4, further comprising:

a work mode switch (49) with which the content of work can be appointed by an operator; and

a switch detection body (50) for detecting the content of work appointed with the work mode switch (49) and outputting the content of work to the generator output control body (51).

10. The control apparatus of a hybrid construction machine according to any of claims 4 to 9, wherein the hybrid construction machine is a hybrid excavator.

7. A control apparatus of a hybrid construction machine for executing works by charging a main battery (12) with power of a power generator (11) to be driven by an engine (10) and driving electric motors (6, 7, 13, 15, 23, 25) by means of power of at least one of the power generator (11) and the main battery (12), comprising;

a work speed regulation body (47) for regulating work speed in accordance with content of work when power of the power generator (11) is a predetermined value or less.

8. The control apparatus of a hybrid construction machine according to claim 7, further comprising:

a manipulating lever (45) to be manipulated by an operator; and

a work determination body (46) for determining the content of work on the basis of manipulating signal from the manipulating lever (45) and outputting the content of work to the work speed regulation body (47).

9. The control apparatus of a hybrid construction machine according to claim 7 further comprising:

a work mode switch (49) with which the content of work can be appointed by an operator; and

a switch detection body (50) for detecting the content of work appointed with the work mode switch (49) and outputting the content of work to the work speed regulation body (47).