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JB/T 11988-2014
JB
MECHANICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 53.060
J 83
Record No.. 45833-2014
Internal combustion counterbalanced forklift trucks
- Energy efficiency test methods
ISSUED ON. MAY 6, 2014
IMPLEMENTED ON. OCTOBER 1, 2014
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Test conditions ... 5
4.1 Test load ... 5
4.2 Requirements for test forklift ... 5
4.3 Accuracy of measurement items and related instruments ... 6
4.4 General requirements ... 6
5 Fuel consumption test ... 7
5.1 Test methods ... 7
5.2 Travel-path of forklift ... 7
5.3 Cycle travelling order ... 8
6 Calculation of unit cycle fuel consumption ... 9
7 Calculation of effective work ... 9
8 Calculation of energy efficiency value ... 10
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard was proposed by China Machinery Industry Federation.
This Standard shall be under the jurisdiction of National Technical Committee
of Auto Standardization (SAC/TC332).
Main drafting organizations of this Standard. Beijing Design Institute of Hoisting
and Conveying Machinery, AND China Hoisting & Conveying Equipment
Quality Supervision and Inspection Center.
Participating drafting organizations of this Standard. Anhui Heli Co., Ltd,
Hangzhou Forklift Group Co., Ltd., Guangxi Liugong Machinery Co., Ltd., Linde
(China) Forklift Truck Co., Ltd., Beijing Hyundai Construction Machinery Co.,
Ltd., Lonking (Shanghai) Forklift Co., Ltd., Dalian Forklift Co., Ltd, Toyota
Industry (Kunshan) Co., Ltd., Shandong Shantui Machinery Co., Ltd. AND
Xiamen XGMA Machinery Co., Ltd.
Main drafters of this Standard. Lu Jianhu, Wang Moyang, Zhao Chunhui, Tao
Jiahong, Li Minghui, Shao Yidong, Xu Chao, Pang Ruifeng, Ao Zhijun, Wang
Shude, Lu Shiming, Zhou Qunli and Zhao Qing.
This Standard is issued for the first time.
Internal combustion counterbalanced forklift trucks
- Energy efficiency test methods
1 Scope
This Standard specifies the energy efficiency test methods of internal
combustion counterbalanced forklift.
This Standard is applicable to diesel-powered and gasoline-powered internal
combustion counterbalanced forklifts. Other types of internal combustion
counterbalanced forklifts (hereinafter referred to as "forklift") can refer to this
Standard.
2 Normative references
The following referenced documents are indispensable for the application of
this Standard. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including all
amendments) applies.
GB/T 6104 Powered industrial trucks - Terminology
3 Terms and definitions
Terms and definitions as described in GB/T 6104 AND the following ones are
applicable to this Standard.
3.1 Unit cycle fuel consumption
Fuel consumption of forklift when it completes a work cycle under specified test
conditions.
3.2 Effective work
The work of forklift when it completes a work cycle on test load under specified
test conditions.
3.3 Energy efficiency value
Effective work done by per unit of fuel consumption of forklift under specified
test conditions.
3.4 Standard laden condition
Forklift is loaded with test load, mast is vertical, the upper surface of fork arm’s
horizontal section is 300 mm from the ground (when rated lifting weight
Q≤10000 kg) or 500 mm (when rated lifting weight Q> l0000 kg).
3.5 Traveling condition with standard laden
Under standard laden condition, mast travels under the maximum backward-tilt
conditions.
4 Test conditions
4.1 Test load
Test load shall comply with the following provisions.
a) Test load is a homogeneous cube of which its mass is 0.7 times of forklift
rated lifting weight Q, its error is ±1%, and side length is twice as long as
the load center distance.
b) In order to ensure that the side length of test load is twice as long as the
load center distance, it shall be allowed to make the test load a cube of
which the surrounding is homogeneous and the middle is hollow.
4.2 Requirements for test forklift
4.2.1 The test forklift shall comply with standard provisions of related products.
4.2.2 Before energy efficiency test starts, the forklift shall be refuelled with fuel,
lubricating oil, hydraulic oil, coolant, etc. required by the test.
4.2.3 Fuel type of test forklift in energy efficiency test shall comply with
requirements of forklift’s instructions for use.
4.2.4 When carrying out energy efficiency test, air conditioner, lighting and other
auxiliary devices which have nothing to do with forklift operation shall be turned
off.
4.2.5 Forklift tire shall comply with the following provisions.
a) Under unladen conditions, pneumatic tire pressure shall be consistent with
specified value; pneumatic pressure error shall be less than ±10% of the
4.4.3 When carrying out energy efficiency test, forklift driver's weight shall be
80 kg. If it is less than 80 kg, weight shall be added to meet the requirements.
5 Fuel consumption test
5.1 Test methods
Fuel consumption shall be measured in fuel weighing method or flow meter
method. When a dispute occurs, it shall adopt fuel weighing method as an
arbitration method.
5.1.1 Fuel weighing method
Disconnect the power supply system of forklift. Connect test vessel in front of
oil feed pump. Weigh fuel mass change in the test vessel before and after the
test. Fuel mass consumption divided by fuel density equals to fuel consumption
of test forklift.
5.1.2 Flow meter method
Disconnect the power supply system of forklift. Concatenate flow meter
between fuel tank and fuel supply system of internal combustion engine. After
the following operation cycle is completed, read the value of flow meter, that is
the fuel consumption of test forklift.
5.2 Travel-path of forklift
In the test, the travel-path of forklift is shown in Figure 1. Forklift's turning radius
R=r+L1, where r is the design value of the minimum turning radius of test forklift;
the lifting height of forklift at A and at B is h=2000 mm, AND the number of
cycles n, travelling distance L0 and L1 are shown in Table 1.
......
(Above excerpt was released on 2015-12-13, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/JBT11988-2014