Received March 1, 2010;
Revised version received March 19, 2010.

TRIZ Principles in Move - Improving Small Car Design

V.S.Sreebalaji1, Dr.R.Saravanan2

1 Professor & Head, Department of Mechanical Engineering,
Einstein College of Engineering,Tirunelveli-12,Tamilnadu, India,
Mobile: 91-9894674531, Email :

2 Professor, Department of Mechanical Engineering,
Bannari Institute of Technology, Satyamangalam, Tamilnadu, India,
Mobile:91-9443347210, Email :


Trying to understand how "TRIZ" (Russian acronym for the "Theory of Inventive Problem Solving"-TIPS) could be used in the past and the same can be used in future applications in an individual field can be difficult. Looking at clever designs, created by others within the domain, desired field and determining what principles embedded within, is a frequently used teaching and learning tool in TRIZ. In particular, the 40 inventive principles have broad use potential in various fields such as Architecture, Mechanical Engineering, Chemical Engineering, Marketing, Business Environment, Sales, Finance and Micro Electronics. Manufacturing of Small car is becoming a trend and passion all over the world automobile manufacturing scenario. In the same line, many Automobile industries, from Eastern to Western countries (since eastern countries are dense populated than western) have started innovation of introducing small car by keeping their country's growing population, better usage of four wheeler with respect to road space and the affordable price in their mind. This paper is a case study how TRIZ induces researchers who involved in product development.

Key words: TRIZ, TIPS, Inventive principles, Innovation, Small car.

Improved Small Car Design Using Single Engineering Parameter and Inventive Principles

The contradiction condition for "Small Car" design problem is "Small cars have convenient size but can't absorb the energy of impact". Albeit every designer hopes to design compact cars that are convenient for urban use (for example: Easy parking or taking up less road space), there is a fear that small cars will not be able to stand up to the impact by a traffic accident, particularly that the engine might injure the passengers. In this example, the designer wants to improve the cars usage of road space, especially engine and engine compartment size. That is to say, to improve the parameter "Area of moving object" (during a collision the engine and engine compartment are considered moving objects). The first two corresponding inventive principles for this parameter from Single Engineering Parameter and Inventive Principles [1] are Principle #15 "dynamicity" and Principle #17 "Shift to a New Dimension". These two principles match the best solution strategies on designing a small car.

Principle # 15 Dynamicity (recommends optimal operating condition, adjustable steering wheel, flexible seating arrangement etc.,)

Principle # 17 Shift to a new dimension (recommends to move into three dimensional space utilization etc.,).

Chin-Chen Liu et al [1] established the usefulness and convenience of Single Engineering Parameter and Inventive Principles and the best solution to design a small car using the same, but the collision problem was left out. This case study focused the left out collision problem, the team has done brainstorming and came up with the smart solution that small cars may have an engine at rear rather than in front, it may be better way to reduce the impact of collision, stand up during collision and major fatal may be averted. (Note: The inventors of the smart car which has engine at rear, to the authors' knowledge, did not make use of TRIZ during the conception of the product). The following illustrations explain various conditions of collision, when cars crashed at different conditions.

Condition1. More damage associated with Collision when front engine small cars crashed face to face.

Condition2. Less damage associated with Collision when rear engine small cars crashed one to other in the same lane.

Condition3. Much Lesser damage associated with Collision when rear engine small cars crashed one to other face to face.


A leading Eastern countries car manufacturing company recently unveiled its small car which has rear side engine. As per authors' knowledge domain, the designers might have used the novel tool TRIZ since the purpose of manufacturing the small car to comply the eastern countries highway vehicles population and optimize the area of the car design or otherwise in terms of TRIZ language to improve the area of moving object. At outset, this case study article emphasis and recommend the designers in various fields, not to go for trial and error approach at all time when a methodology like TRIZ is available to offer maximum results with minimal effort.


TRIZ is a vibrant tool in all means with its powerful search features and offers maximum results with minimal effort. In this case, it has been proven that TRIZ has already provided the best solution to the particular small car design problem. Apart from that it gives further scope to proceed to find the most optimal design solution with respect to safety design. The actions of various TRIZ principles are powerful tool in the conception of new design. Individuals should routinely look for opportunities in their domain for applying TRIZ from day today life findings to key innovations.


  1. Chin-Chen Liu PhD student, Professor Jahau Lewis Chen, Department of Mechanical Engineering. National Cheng Kung University, Taiwan. A TRIZ Inventive Design Method without Contradiction information, The Triz journal article archive-Sep-2001.