Hybrid construction machine having auxiliary battery and control apparatus thereof

• US 7,279,801 B2
• Filed: 07/19/2004
• Issued: 10/09/2007
• Est. Priority Date: 06/25/1999
• Status: Expired due to Fees

• Current Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Original Assignee: Kobelco Construction Machinery Company Limited (Kobe Steel Limited)
• Inventors: Kagoshima, Masayuki
• Primary Examiner(s): Ponomarenko; Nicholas
• Application Number:
  US10/893,262
• Publication Number:
  US 20050001606A1
• Time in Patent Office: 1,177 Days
• Field of Search: 290/4.R, 290/4.C, 290/7, 290/40.A, 290/40.B, 290/40.C, 18/652, 18/654, 183/12
• US Class Current: 290/40.00C
• CPC Class Codes: B60K 25/00 Auxiliary drives B60K16/00 takes precedence; arrangements of tyre-inflating pumps mounted on vehicles B60C23/10; driving tyre-inflating pumps B60C; driving engine auxiliaries F02B
• CPC Class Codes: B60K 6/46 Series type
• CPC Class Codes: B60K 6/54 Transmission for changing ratio
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 50/62 charged by low-power generators primarily intended to support the batteries, e.g. range extenders
• CPC Class Codes: B60L 58/14 Preventing excessive discharging
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2710/086 Power
• CPC Class Codes: B60W 50/085 Changing the parameters of the control units, e.g. changing limit values, working points by control input
• CPC Class Codes: B60Y 2200/41 Construction vehicles, e.g. graders, excavators
• CPC Class Codes: E02F 9/207 : of the type electric propulsion units, e.g. electric motors or generators
• CPC Class Codes: E02F 9/2075 : of the hybrid type for vehicles in general B60W20/00
• CPC Class Codes: E02F 9/2091 : Control of energy storage means for electrical energy, e.g. battery or capacitors energy recovery arrangements in hydraulic or pneumatic drives E02F9/2217
• CPC Class Codes: F15B 11/17 : using two or more pumps
• CPC Class Codes: F15B 15/18 : Combined units comprising both motor and pump
• CPC Class Codes: F15B 21/08 : Servomotor systems incorporating electrically operated control means F15B21/02, F15B21/065 take precedence
• CPC Class Codes: F15B 21/087 : Control strategy, e.g. with block diagram
• CPC Class Codes: F15B 2211/20515 : Electric motor
• CPC Class Codes: F15B 2211/20576 : with multiple pumps
• CPC Class Codes: F15B 2211/27 : Directional control by means of the pressure source
• CPC Class Codes: F15B 2211/275 : Control of the prime mover, e.g. hydraulic control
• CPC Class Codes: F15B 2211/6651 : Control of the prime mover, e.g. control of the output torque or rotational speed
• CPC Class Codes: F15B 2211/78 : Control of multiple output members
• CPC Class Codes: F15B 7/005 : With rotary or crank input
• CPC Class Codes: F15B 7/006 : Rotary pump input
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility

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 driven by an engine (10), power of an auxiliary battery (42) and power of a main battery (12) charged with power of the power generator (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 power 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 emergency such that the electric motors (6, 7, 13, 15, 23, 25) can not be driven by means of the normal power.

Claims

1. A control apparatus of a hybrid construction machine for executing works by charging a main battery with power of a power generator to be driven by an engine and driving electric motors by means of power discharged from at least the main battery, comprising:

a generator output control body for varying power output from the power generator in accordance with content of work performed by the hybrid construction machine.

2. The control apparatus of a hybrid construction machine according to claim 1, further comprising:

a manipulating lever to be manipulated by an operator; and

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

3. The control apparatus of a hybrid construction machine according to claim 1, further comprising:

a work mode switch with which the content of work can be selected by an operator; and

a switch detection body for detecting the content of the work selected with the work mode switch and outputting the content of the work to the generator output control body.

7. The control apparatus of a hybrid construction machine according to claim 1, wherein the hybrid construction machine is a hybrid excavator.

4. A control apparatus of a hybrid construction machine for executing work by charging a main battery with power of a power generator to be driven by an engine and driving electric motors by means of power of at least one of the power generator and the main battery, comprising:

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

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

a manipulating lever to be manipulated by an operator;

and

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

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

a work mode switch with which the content of work can be selected by an operator, and

a switch detection body for detecting the content of the work selected with the work mode switch and outputting the content of the work to the work speed regulation body.

8. The control apparatus of a hybrid construction machine according to 4, wherein the construction machine is a hybrid excavator.