With all the focus on hybrids, electric cars and other alternative fuels, the one thing that's taken as a given is the death of petrol-fuelled engine, the common perception being that the Otto cycle has reached the zenith of its development and is due to be put on the shelf as part of history. But have we really wrung every last bit of efficiency possible out of the petrol-fueled piston engine?
Recently, a two-page press release caught my attention. It was a press release like any other, not so different from the multitudes that cross my desk each and every day.
"GM takes new combustion technology out of the lab and onto the road" is hardly a head-turning headline. But two paragraphs into the release were four words that awoke my inner pocket protector: Homogeneous Charge Compression Ignition.
I know, I know, your heart is doing little flutters too. But, before I lose you in a discussion of thermodynamics and intake charge distribution, let me state that GM's contention that this is the "most awaited advanced combustion technology of the past 30 years" may well be spot on.
It achieves that exalted status, says GM, by combining the fuel economy of a diesel engine with the superior emissions cleanliness and drivability of a petrol engine. Fuel economy is improved by as much as 15 per cent over conventional petrol engines, yet an HCCI engine requires very little exhaust treatment (ie, catalysts) and certainly none of the "chemical laboratory" after-treatment that diesels need for emissions requirements.
It does this by combining the basic principles of both diesel and gas engines. Essentially, the much-modified 2.2L Ecotec engine I tested in a Saturn Aura recently operates in traditional petrol and a new 'diesel-like' modes. In "SI" (spark ignition) mode, it's a regular Ecotec with spark plugs firing a direct-injected air-fuel mixture. The prototype's SI light is always on at idle and whenever the engine is under heavy load.
However, like a typical diesel engine, when the one-off Aura's "HCCI" light is on, the 2.2L needs no spark plugs. This offers all manner of advantages, says Vijay Ramappan, HCCI Calibration Engineer for GM. Because the fuel is igniting itself, the combustion inside the cylinder happens all at once. That might not sound like a big deal, but when you are initiating combustion using a spark plug, the farthest reaches of the combustion chamber have to wait for the explosion to propagate outward.
This delay, measured in milliseconds, is one of the reasons for the petrol engine's relative inefficiency compared with a diesel.
On the other hand, unlike a diesel (but as with a conventional petrol engine), even in HCCI mode, the Saturn's fuel and air are premixed. In a diesel engine, injecting the fuel directly into the cylinder serves the purpose of the spark plug - to cause the torque-producing explosion at exactly the opportune time.
While this helps with minimising the HCCI's emissions, without a spark plug or the diesel's injection of fuel to time the ignition precisely, getting the entire process to occur at the precise for optimum combustion becomes a far trickier process than in either gas or diesel engine.
Unlike a petrol engine, a diesel (and since they are so similar, an HCCI engine as well) needs heat - lots of it - to generate an explosion. A diesel engine uses an incredibly high compression ratio (often as high as 17:1, compared with a petrol-powered engine at 10:1) to get things inside the cylinder percolating. GM's HHCI engine has no such option, since such a high compression ratio would create detonation when operate in its normal spark ignition mode.
What to do? Well, according to Ramappan, the trick is to run a second camshaft that shuts the exhaust valve down early. Doing so traps a bunch of the exhaust gases in the cylinder. Trapping those incredibly hot exhaust gases sends the temperature inside the combustion chamber sky high, more than enough for the incoming fuel-air mixture to self-ignite and operate in HCCI's 'diesel-like' mode.
An HCCI-equipped engine offers a 10 to 15 per cent increase in fuel economy with very little change in driving abilities. At idle, it sounds completely normal because it operates exactly like the same spark plug-ignited four-banger that powers so many GM vehicles. Acceleration is similar and, above about 90kph, the sound is also identical as the engine is still operating in SI mode.
But when cruising at a steady speed below 90 clicks, the engine quickly flicks to its fuel-saving HCCI mode, with just a slight hint of the more robust engine noise that anyone who's ever drive a diesel-powered car is familiar with. However, since the vehicle is moving, it's barely noticeable.
Ramappan says that HCCI's entry into the marketplace is still some time away. Getting the right amount of exhaust gas in the cylinder while simultaneously injecting the precise amount of fuel is beyond the current onboard computers' abilities.
But know this; General Motors is a leader in this technology. The company seems once again committed to taking on imports head-on and getting to the forefront of automotive technological development.
motoring@thenational.ae
Company%20Profile
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Key findings
- Over a period of seven years, a team of scientists analysed dietary data from 50,000 North American adults.
- Eating one or two meals a day was associated with a relative decrease in BMI, compared with three meals. Snacks count as a meal. Likewise, participants who ate more than three meals a day experienced an increase in BMI: the more meals a day, the greater the increase.
- People who ate breakfast experienced a relative decrease in their BMI compared with “breakfast-skippers”.
- Those who turned the eating day on its head to make breakfast the biggest meal of the day, did even better.
- But scrapping dinner altogether gave the best results. The study found that the BMI of subjects who had a long overnight fast (of 18 hours or more) decreased when compared even with those who had a medium overnight fast, of between 12 and 17 hours.
Our family matters legal consultant
Name: Dr Hassan Mohsen Elhais
Position: legal consultant with Al Rowaad Advocates and Legal Consultants.
COMPANY%20PROFILE%20
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WHAT IS A BLACK HOLE?
1. Black holes are objects whose gravity is so strong not even light can escape their pull
2. They can be created when massive stars collapse under their own weight
3. Large black holes can also be formed when smaller ones collide and merge
4. The biggest black holes lurk at the centre of many galaxies, including our own
5. Astronomers believe that when the universe was very young, black holes affected how galaxies formed
The specs
AT4 Ultimate, as tested
Engine: 6.2-litre V8
Power: 420hp
Torque: 623Nm
Transmission: 10-speed automatic
Price: From Dh330,800 (Elevation: Dh236,400; AT4: Dh286,800; Denali: Dh345,800)
On sale: Now
The White Lotus: Season three
Creator: Mike White
Starring: Walton Goggins, Jason Isaacs, Natasha Rothwell
Rating: 4.5/5
Janet Yellen's Firsts
- In 2014, she became the first woman to lead the US Federal Reserve
- In 1999, she became the first female chair of the White House Council of Economic Advisers
Your Guide to the Home
- Level 1 has a valet service if you choose not to park in the basement level. This level houses all the kitchenware, including covetable brand French Bull, along with a wide array of outdoor furnishings, lamps and lighting solutions, textiles like curtains, towels, cushions and bedding, and plenty of other home accessories.
- Level 2 features curated inspiration zones and solutions for bedrooms, living rooms and dining spaces. This is also where you’d go to customise your sofas and beds, and pick and choose from more than a dozen mattress options.
- Level 3 features The Home’s “man cave” set-up and a display of industrial and rustic furnishings. This level also has a mother’s room, a play area for children with staff to watch over the kids, furniture for nurseries and children’s rooms, and the store’s design studio.
The%20specs%3A%202024%20Mercedes%20E200
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What can you do?
Document everything immediately; including dates, times, locations and witnesses
Seek professional advice from a legal expert
You can report an incident to HR or an immediate supervisor
You can use the Ministry of Human Resources and Emiratisation’s dedicated hotline
In criminal cases, you can contact the police for additional support
Company profile
Date started: December 24, 2018
Founders: Omer Gurel, chief executive and co-founder and Edebali Sener, co-founder and chief technology officer
Based: Dubai Media City
Number of employees: 42 (34 in Dubai and a tech team of eight in Ankara, Turkey)
Sector: ConsumerTech and FinTech
Cashflow: Almost $1 million a year
Funding: Series A funding of $2.5m with Series B plans for May 2020
Our legal consultant
Name: Hassan Mohsen Elhais
Position: legal consultant with Al Rowaad Advocates and Legal Consultants
Real estate tokenisation project
Dubai launched the pilot phase of its real estate tokenisation project last month.
The initiative focuses on converting real estate assets into digital tokens recorded on blockchain technology and helps in streamlining the process of buying, selling and investing, the Dubai Land Department said.
Dubai’s real estate tokenisation market is projected to reach Dh60 billion ($16.33 billion) by 2033, representing 7 per cent of the emirate’s total property transactions, according to the DLD.
Suggested picnic spots
Abu Dhabi
Umm Al Emarat Park
Yas Gateway Park
Delma Park
Al Bateen beach
Saadiyaat beach
The Corniche
Zayed Sports City
Dubai
Kite Beach
Zabeel Park
Al Nahda Pond Park
Mushrif Park
Safa Park
Al Mamzar Beach Park
Al Qudrah Lakes
At a glance
Global events: Much of the UK’s economic woes were blamed on “increased global uncertainty”, which can be interpreted as the economic impact of the Ukraine war and the uncertainty over Donald Trump’s tariffs.
Growth forecasts: Cut for 2025 from 2 per cent to 1 per cent. The OBR watchdog also estimated inflation will average 3.2 per cent this year
Welfare: Universal credit health element cut by 50 per cent and frozen for new claimants, building on cuts to the disability and incapacity bill set out earlier this month
Spending cuts: Overall day-to day-spending across government cut by £6.1bn in 2029-30
Tax evasion: Steps to crack down on tax evasion to raise “£6.5bn per year” for the public purse
Defence: New high-tech weaponry, upgrading HM Naval Base in Portsmouth
Housing: Housebuilding to reach its highest in 40 years, with planning reforms helping generate an extra £3.4bn for public finances
Election pledges on migration
CDU: "Now is the time to control the German borders and enforce strict border rejections"
SPD: "Border closures and blanket rejections at internal borders contradict the spirit of a common area of freedom"
THE SPECS
Engine: 1.5-litre, four-cylinder turbo
Transmission: seven-speed dual clutch automatic
Power: 169bhp
Torque: 250Nm
Price: Dh54,500
On sale: now
Specs
Engine: Dual-motor all-wheel-drive electric
Range: Up to 610km
Power: 905hp
Torque: 985Nm
Price: From Dh439,000
Available: Now
'Worse than a prison sentence'
Marie Byrne, a counsellor who volunteers at the UAE government's mental health crisis helpline, said the ordeal the crew had been through would take time to overcome.
“It was worse than a prison sentence, where at least someone can deal with a set amount of time incarcerated," she said.
“They were living in perpetual mystery as to how their futures would pan out, and what that would be.
“Because of coronavirus, the world is very different now to the one they left, that will also have an impact.
“It will not fully register until they are on dry land. Some have not seen their young children grow up while others will have to rebuild relationships.
“It will be a challenge mentally, and to find other work to support their families as they have been out of circulation for so long. Hopefully they will get the care they need when they get home.”
In numbers: PKK’s money network in Europe
Germany: PKK collectors typically bring in $18 million in cash a year – amount has trebled since 2010
Revolutionary tax: Investigators say about $2 million a year raised from ‘tax collection’ around Marseille
Extortion: Gunman convicted in 2023 of demanding $10,000 from Kurdish businessman in Stockholm
Drug trade: PKK income claimed by Turkish anti-drugs force in 2024 to be as high as $500 million a year
Denmark: PKK one of two terrorist groups along with Iranian separatists ASMLA to raise “two-digit million amounts”
Contributions: Hundreds of euros expected from typical Kurdish families and thousands from business owners
TV channel: Kurdish Roj TV accounts frozen and went bankrupt after Denmark fined it more than $1 million over PKK links in 2013
NO OTHER LAND
Director: Basel Adra, Yuval Abraham, Rachel Szor, Hamdan Ballal
Stars: Basel Adra, Yuval Abraham
Rating: 3.5/5
How green is the expo nursery?
Some 400,000 shrubs and 13,000 trees in the on-site nursery
An additional 450,000 shrubs and 4,000 trees to be delivered in the months leading up to the expo
Ghaf, date palm, acacia arabica, acacia tortilis, vitex or sage, techoma and the salvadora are just some heat tolerant native plants in the nursery
Approximately 340 species of shrubs and trees selected for diverse landscape
The nursery team works exclusively with organic fertilisers and pesticides
All shrubs and trees supplied by Dubai Municipality
Most sourced from farms, nurseries across the country
Plants and trees are re-potted when they arrive at nursery to give them room to grow
Some mature trees are in open areas or planted within the expo site
Green waste is recycled as compost
Treated sewage effluent supplied by Dubai Municipality is used to meet the majority of the nursery’s irrigation needs
Construction workforce peaked at 40,000 workers
About 65,000 people have signed up to volunteer
Main themes of expo is ‘Connecting Minds, Creating the Future’ and three subthemes of opportunity, mobility and sustainability.
Expo 2020 Dubai to open in October 2020 and run for six months
Essentials
The flights
Emirates, Etihad and Malaysia Airlines all fly direct from the UAE to Kuala Lumpur and on to Penang from about Dh2,300 return, including taxes.
Where to stay
In Kuala Lumpur, Element is a recently opened, futuristic hotel high up in a Norman Foster-designed skyscraper. Rooms cost from Dh400 per night, including taxes. Hotel Stripes, also in KL, is a great value design hotel, with an infinity rooftop pool. Rooms cost from Dh310, including taxes.
In Penang, Ren i Tang is a boutique b&b in what was once an ancient Chinese Medicine Hall in the centre of Little India. Rooms cost from Dh220, including taxes.
23 Love Lane in Penang is a luxury boutique heritage hotel in a converted mansion, with private tropical gardens. Rooms cost from Dh400, including taxes.
In Langkawi, Temple Tree is a unique architectural villa hotel consisting of antique houses from all across Malaysia. Rooms cost from Dh350, including taxes.
Company%C2%A0profile
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Mercer, the investment consulting arm of US services company Marsh & McLennan, expects its wealth division to at least double its assets under management (AUM) in the Middle East as wealth in the region continues to grow despite economic headwinds, a company official said.
Mercer Wealth, which globally has $160 billion in AUM, plans to boost its AUM in the region to $2-$3bn in the next 2-3 years from the present $1bn, said Yasir AbuShaban, a Dubai-based principal with Mercer Wealth.
“Within the next two to three years, we are looking at reaching $2 to $3 billion as a conservative estimate and we do see an opportunity to do so,” said Mr AbuShaban.
Mercer does not directly make investments, but allocates clients’ money they have discretion to, to professional asset managers. They also provide advice to clients.
“We have buying power. We can negotiate on their (client’s) behalf with asset managers to provide them lower fees than they otherwise would have to get on their own,” he added.
Mercer Wealth’s clients include sovereign wealth funds, family offices, and insurance companies among others.
From its office in Dubai, Mercer also looks after Africa, India and Turkey, where they also see opportunity for growth.
Wealth creation in Middle East and Africa (MEA) grew 8.5 per cent to $8.1 trillion last year from $7.5tn in 2015, higher than last year’s global average of 6 per cent and the second-highest growth in a region after Asia-Pacific which grew 9.9 per cent, according to consultancy Boston Consulting Group (BCG). In the region, where wealth grew just 1.9 per cent in 2015 compared with 2014, a pickup in oil prices has helped in wealth generation.
BCG is forecasting MEA wealth will rise to $12tn by 2021, growing at an annual average of 8 per cent.
Drivers of wealth generation in the region will be split evenly between new wealth creation and growth of performance of existing assets, according to BCG.
Another general trend in the region is clients’ looking for a comprehensive approach to investing, according to Mr AbuShaban.
“Institutional investors or some of the families are seeing a slowdown in the available capital they have to invest and in that sense they are looking at optimizing the way they manage their portfolios and making sure they are not investing haphazardly and different parts of their investment are working together,” said Mr AbuShaban.
Some clients also have a higher appetite for risk, given the low interest-rate environment that does not provide enough yield for some institutional investors. These clients are keen to invest in illiquid assets, such as private equity and infrastructure.
“What we have seen is a desire for higher returns in what has been a low-return environment specifically in various fixed income or bonds,” he said.
“In this environment, we have seen a de facto increase in the risk that clients are taking in things like illiquid investments, private equity investments, infrastructure and private debt, those kind of investments were higher illiquidity results in incrementally higher returns.”
The Abu Dhabi Investment Authority, one of the largest sovereign wealth funds, said in its 2016 report that has gradually increased its exposure in direct private equity and private credit transactions, mainly in Asian markets and especially in China and India. The authority’s private equity department focused on structured equities owing to “their defensive characteristics.”
Formula Middle East Calendar (Formula Regional and Formula 4)
Round 1: January 17-19, Yas Marina Circuit – Abu Dhabi
Round 2: January 22-23, Yas Marina Circuit – Abu Dhabi
Round 3: February 7-9, Dubai Autodrome – Dubai
Round 4: February 14-16, Yas Marina Circuit – Abu Dhabi
Round 5: February 25-27, Jeddah Corniche Circuit – Saudi Arabia
Women%E2%80%99s%20T20%20World%20Cup%20Qualifier
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