Help us out: Engine Designer Demo - Scenarios

Now, for a contrast, the early game scenario.

Scenario description:
1946. Things just get sorted out after the war. You are a tractor manufacturer, but you want to expand into automotive world. You have designed the wooden chassis already, you have also designed the card-board based body and wooden leaf suspension. Now, only the engine is needed. Remember. It has to be cheap. Oh, and don't worry about the fact that your cars will make other cars seem great. Just do this.

Technical limitations:
950-1050 cc engine capacity
Must run on Regular leaded fuel
40s tech only
Anything other is allowed, but it the cost restriction is very strict, so it's unlikely that you'll be able to put titanium conrods, for example.

Technical specifications:
Total cost in 1945 "type region here" factory lower than z (45%)
Economy better than y (30%)
MTTF higher than z (20%)
Power higher than p (5%) (oh, and p is a small value)

Not sure exactly how specific we can go, but I really wanted a Trans AM 2.5 style scenario.

Scenario
It's 1970 and a racing organization is planning on starting it's 2.5 challenge next year, you have been contracted by an American auto company to build a racing engine to compete against foreign cars. The company has already given you the template for their engine, it's up to you to bring it to life.

Technical Limitations
3.501-3.581 bore
3.625in stroke
2287cc-2393cc (If the bore and stroke is too specific)
Aluminum block
Cast Iron crankshaft
Cast Iron head
Must be carbureted
4 speed transmission


Technical specifications:
1. Power more than x (55%)
2. Weight lower than y (20%)
3. Responsiveness more than z (20%)
4. MTTF higher than q (5%)

Scenario description:
2004. Company you are working in as the engine engineer, is on the verge of bancrupcy. They need to make a car which will be financial success. They have decided to build a successor to their compact hatch. And here comes the problem. It has to be both sporty and economical. Both cheap and responsive. Both reliable and furious. It's YOUR job to make an engine that fits all of these requirements. Prove that it is possible.

Technical limitations:
1600 cc max engine capacity
RON 95 or lower
Anything other is restricted my cost restriction
Also, your company has more advanced fuel systems than others (manufacture year of the fuel system is 2007)

Technical specifications:
Total cost in 2005 "type region here" factory lower than x (20%)
Economy better than y (20%)
MTTF higher than z (20%)
Power higher than p (20%)
Responsiveness higher than q (20%)


One specification too much Kubby, please edit. I suggest you take out the emissions spec. /Killrob
Oh. So specification limit was the hard limit... /Kubby

Scenario description:
1998. Your company wants to build a sports sedan. However, some guys from financial department decided that you have to use the bottom end from the more popular model. And they don't care about the fact that cast recipropating parts aren't really suitable for high-reved engine. "Make it low-reved then, you dump clod!"

Technical limitations:
You already have the bottom end designed. You can change nothing in it. (1.9 lt, cast recipropating parts, cast iron block)
91 RON or lower
No direct injection (while it was possible, your company doesn't use it)

Technical specifications:
Total cost in 1995 "type region here" factory lower than x (40%)
MTTF higher than y (25%)
Power higher than z (35%)

Scenario description:
The year is 19xx. To further help expand your company world wide, you need to develop a new entry-level engine type. It will be used on all regions/markets, so it needs to be able to run on bad quality fuel . The engine will be used for the next 5 years as an starter-engine for all the various models weighting below 1500kg. Keeping costs low is important to maximize profit. Finally it needs to maintain decent reliability and economy.

Technical limitations:
- Naturally aspirated
- Engine capacity 1200-1800cc
- Standard intake
- Catalytic converter


Technical specifications:
- Fuel Octane lower than A (25%)
- Loudness lower than B (10%)
- Economy lower than C (20%)
- Cost lower than D (25%)
- MTTF higher than E (20%)

Scenario description:
The year is 1962, you are a small sports car company that need a new engine for its new sport car. The new engine will have to be based on a production engine from a large company so you can't change much on the bottom end, the same company wants to use the engine in it's next sports sedan so costs will have to be kept in check.

Technical limitations:
Naturally aspirated,
Bore 81mm-82.6mm, Stroke 72.8mm,
Fuel injection not allowed
Cast bottom end

Technical specifications:
a) Power more than x (50%)
b) Cost lower than z (20%)
c) MTTF higher than y (20%)
d) Responsiveness more than q (10%)

Scenario description:

The year is 1995. The Mazda Mx-5 has reigned supreme for 6 years now. Land Rover has resurrected the British Leyland name and is trying to take back the pride of British roadsters from the Japanese. Their plan is to make a front engined rear-wheel drive car. It must be low weight, inexpensive and, unlike British roadsters of the past, reliable.


Technical limitations:

• 1800cc max. capacity
• Must be longitudinal
• Must be naturally aspirated
• Must rev to 6500+ rpms
• All other period appropriate technologies allowed.

Technical specifications:

• Weight lower than w (35%)
• Cost lower than x (25%)
• Power more than y (25%)
• MTTF higher than z (15%)
  

Scenario description:

The year is 1982. The CEO of Chrysler has learned that Renault has plans to revive an old project discarded by a Chrysler subsidiary that was later sold to Renault. They have dubbed it the "Espace". Not to be out done and humiliated, Chrysler is planning to create their own people carrier and plan to bring it to market before Renault. It is your job to make the engine. It must be affordable, reliable and economical.


Technical limitations:

• 3L max. capacity
• Must use RON 87 or lower
• Must be trans-axle
• All other period appropriate technologies allowed.

Technical specifications:

• Cost lower than x (40%)
• MTTF higher than y (35%)
• Economy greater than z (25%)
  

Scenario description:

The year is 1999. The local 1300cc racing competition have changed the rules on possible technology can be used in there engines.


Your company already produces a 1300cc engine for the competition. It produces X/KW and Y/NM and uses SOHC 8 valve, as that is all the old competition rules allowed. You used to produced the most popular engine in the competition but over the past few years you have slipped to second, your goal is to take back the top spot...

Technical limitations:

1.3L max. capacity
RON not really important but lower RON will win a few extra points
New rules allow DOHC 16 Valve
No turbo allowed
All other period appropriate technologies allowed.


Technical specifications:

Produce more than Y NM (30%)
Produce more than X HP (30%)
Last longer than 1 season between rebuilds (20%)
Cost initial and servicing <= W (15%)
Run on 95 RON or lower (5%)

(ok the idea behind this is that you are producing a racing engine but it is in a cheaper category or road racing and keeping cost down is also important. Longevity of the racing engine is also a consideration, not having to do a major rebuild on the engine after every season and a life of over 5 years is a must).

Scenario description:
Do you remember the scenario where you had to design the cheap engine right after the war? Now, forty years later, in 1986, Cossack Autos became one of the largest car manufacturers. They've been offering the Cossack Tuning Experts, or shortly, CTE models since 1975. Now, they are going to create the 2200 CTE, based on their compact car. And they have contacted you. Remember, it STILL has to be cheap.

Technical limitations:
2150-2250 cc engine capacity
Must run on regular unleaded fuel
no multipoint or direct fuel injection
Anything period appropiate is allowed, as long as you meet the cost restriction.

Technical specifications:
Total cost in 1985 "type region here" factory lower than x (40%) /though we don't have any 1985 factory, we have tested it with 1980 Germany Factory and set the limit there as 350$
Power higher than z (25%) /after some testing, I suggest 170 hp (126.76 kW). As you operate in kW, this limit may seem arbitrary, so, I suggest 125 kW (167.62 hp) alternatively
MTTF higher than y (15%) /3000 MRevs suggested
Responsiveness higher than p (15%) /35 suggested
Service costs lower than q (5%) /850$/year suggested - Kubby