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Demonstrate knowledge of the operation and testing of vehicle diesel
emission controls
Level
3
Credits
4
Purpose
This theory-based unit standard is for people in the vehicle repair industry.
People credited with this unit standard are able to demonstrate knowledge of:
diesel emissions; diesel emission standards and testing requirements; and
diesel engine emission control system technology.
Subfield
Motor Industry
Domain
Automotive Fuel Systems and Exhaust
Status
Registered
Status date
25 January 2008
Date version published
25 January 2008
Planned review date
31 December 2012
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
NZ Motor Industry Training Organisation (Incorporated)
Accreditation and Moderation Action Plan (AMAP) reference
0014
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
Legislation and publications relevant to this unit standard include but are not limited
to – Environment Act 1986; Ozone Layer Protection Act 1996; Resource
Management Act 1991; Petroleum Products Specifications Regulations 2002; Land
Transport Rule: Vehicle Exhaust Emissions 2007, Rule 33001/2; New Zealand
Standard NZS 7500:2005 Automotive biodiesel – Specification for manufacture and
blending; Land Transport New Zealand Infosheet 2.08, Vehicle Exhaust Emissions
Rule requirements.
2
Land Transport Rules are produced for the Minister of Transport by Land Transport
New Zealand. These rules are available online at
http://www.landtransport.govt.nz/rules/.
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New Zealand Standards are available from Standards New Zealand, Private Bag
2439, Wellington; phone 04 498 5990; or website http://www.standards.co.nz.
Land Transport New Zealand Infosheets are available online at
http://www.landtransport.govt.nz/publications/infosheets/.
3
Definitions
International emission standards are those standards adopted by various standard
setting bodies or countries which may be referred to in legislation. Application and
approval of emission standards are stated in the Land Transport Rule: Vehicle
Exhaust Emissions 2007, Rule 33001/2.
Service information may include but is not limited to – technical information of a
vehicle, machine, or product detailing operation; installation and servicing
procedures; manufacturer instructions and specifications; technical terms and
descriptions; and detailed illustrations. This can be accessed in hard copy or
electronic format and is normally sourced from the manufacturer.
Elements and performance criteria
Element 1
Demonstrate knowledge of diesel emissions.
Performance criteria
1.1
Risks posed by diesel fuel emissions are identified in terms of their impact on
health and the environment.
Range
1.2
Impact of environmental regulations on vehicles is explained in accordance with
legislative requirements.
Range
1.3
international emission standards affecting vehicle specifications,
diesel fuel specifications, environmental legislation, Land
Transport Rules, engine and fuel system technology
improvements, use of biodiesel and alternative fuels, urban
design.
The variation of diesel exhaust composition from a vehicle is described in
accordance with various factors.
Range
1.4
climate change and global warming, ozone depletion, plant and
animal life, personal health risks.
various factors include – engine technology, vehicle operating
conditions, fuel specifications, lubricating oil, emission control
system present.
Gases and by-products of combustion emitted by diesel engined vehicles are
identified.
Range
carbon dioxide (CO²), carbon monoxide (CO), hydrocarbon (HC),
nitrogen oxides (NOx), diesel particulate matter (PM).
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Element 2
Demonstrate knowledge of diesel emission standards and testing requirements.
Performance criteria
2.1
Objective of the Land Transport Rule: Vehicle Exhaust Emissions is described
in accordance with legislative requirements.
2.2
Approved vehicle international emission standards relating to diesel engines are
described in accordance with legislative requirements.
Range
2.3
The timetable to implement exhaust emissions requirements for diesel fuelled
vehicles is explained in accordance with legislative requirements.
Range
2.4
includes but is not limited to – Australian Design Rules (ADRs),
UN/ECE (euro) regulations, EEC (euro) regulations, Federal (US)
regulations, California code of regulations, Japan safety
regulations.
date of manufacture, new models, existing models.
New Zealand testing requirements for vehicle diesel exhaust emissions are
described in accordance with service information and legislative requirements.
Range
visible smoke check, emission standards test cycles (CO, HC,
NOx, PM).
Element 3
Demonstrate knowledge of diesel engine emission control system technology.
Performance criteria
3.1
Diesel emission control systems and their components are identified in
accordance with service information.
Range
3.2
includes but is not limited to – diesel particulate filter, diesel
oxidation catalyst, NOx reduction control (NOx adsorber, selective
catalytic reduction [SCR], exhaust gas recirculation [EGR]).
The principles and operation of diesel emission control devices are explained in
accordance with service information.
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3.3
Engine and fuel technology used by manufacturers to meet diesel emission
standards are identified in accordance with service information and legislative
requirements.
Range
3.4
includes but is not limited to – air and turbocharger management
systems, in-cylinder and exhaust post injection, common rail fuel
injection, unit injectors, ultra-high fuel injection pressure, multiple
fuel injections, increased peak cylinder pressures, exhaust system
design;
low sulphur fuel, biodiesel, alternative fuels, urea.
The importance of regular maintenance to maintain or restore emission levels
specified by the vehicle or engine manufacturer is explained in terms of
reducing pollutants into the environment and tangible benefits to vehicle
owners.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the NZ Motor Industry Training Organisation (Incorporated)
info@mito.org.nz if you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016