So, in the beginning of the title engines TOYOTA (before dash), the first number stands designed to identify the sequence number of the engine in series. Example: A series engines S, 3S-FE engines and 4S-FE structurally identical (do not take it literally), but differ in the working volume. Same thing at the 2JZ - 1JZ, 2C - 1C, 4A - 5A and .t.d. And, optionally, the smaller the number - the greater the volume of the engine and vice versa, rather smaller number indicates an earlier year of development.
After talking numbers letter (also goes to the dash), which represents a series of engines and in fact is the main title. All series engines are similar structurally and may vary the working volume, the method of filling the working mixture, a year of development. As a rule, the entire series has what - what general advantages and disadvantages. Example series designations you can see above. However, here you can find something - what information. All series engines developed in 1990 and after are two letters in the name. But we must not confuse the beginning of the year of issue-specific engine model and year of the beginning of a new series. Example: engines 4A-FSE, 5S-FE, 3C-T (and some others) have been developed since 1990, but since they belong to the old series A, S and C, we have one letter before the dash. But representatives of the series JZ, NZ, ZZ and the other with the letter Z in the title until 1990, no. Somewhat unusual name 3-liter diesel 1KZ-TE (1993 development), as his successor 1KD-FTV (also a 3-liter diesel engine, but the 1996 development) has the letter D in the title. Most likely, the company TOYOTA 1996 decided to apply for the names of diesels letter D, and for gasoline engines letter Z.
Letters going after the dash indicate the design features of the engine. The first letter after the dash indicates the design features of the head unit and the "degree of forcing" the engine. If this is the letter F - this is the standard horsepower motor series with 4 valves per cylinder, the so-called High Efficiency Twincam Engine. Such motors driven by a belt or timing chain has only one camshaft, the second camshaft is driven through the first gear (engines t.n.z. "narrow" the cylinder head). Examples: 5A-F, 1G-FE, 5E-FE, etc.
If after the first dash is the letter G, the engine is increased degree of forcing each of the camshaft which has its own drive from the belt (chain) Timing. TOYOTA calls these engines - High Performance Engine, and the camshafts are driven by their own gears (engines with "broad" cylinder head). All engines with the letter G - gasoline, electronic fuel injection, turbocharged often (supercharged). Examples: 4A-GE (max. Speed 8000 rev / min), 3S-GE (max. Speed 7000 rev / min), 1G-GTE (turbo).
If you notice, the motor with the letters F and G may belong to the same series (eg 4A-FE and 4A-GE), which means that they are developed on the basis of one (Bore, Stroke, and more - the same), but different design of the cylinder head and other elements of the engine.
Absence of letters F or G after the dash means that the engine has 2 valves per cylinder. Examples: 1G-EU, 2C, 3A-L, 2L-TE.
After the second dash (or first, if the engine with two valves per cylinder) goes letter carrying various supporting information:
T - is at all turbocharged engines. Examples: 1G-GTE, 2L-TE.
S - engine with direct fuel injection (basically it is the most modern engines, the development after 1996). Examples: 4A-FSE, 1JZ-FSE.
X - the engine is designed to run on a hybrid or fuel used in vehicles such as hybrid power plants ICE - motor. Examples: 1NZ-FXE, 1AZ-FXE.
P - engine, designed to run on LPG. Example: 3Y-PE.
H - special fuel injection system (company designation: EFI-D). Example: 5E-FHE.
Z - the engine is equipped with a Super Charger. Example: 4A-GZE.
Third after the dash (or the first - the second if the engine with two valves per cylinder, and (or) does not apply to categories of engines with a dash in the title after the letters T, S, X, P, H) goes letter carrier information about how to create a working mix:
E - engine with multipoint electronic fuel injection (EFI); for diesel engines which means that they are electronically - controlled high pressure fuel pump (high pressure pump). Examples: 5A-FE (petrol), 2JZ-FSE (petrol), 2L-TE (diesel).
i - the engine with one-point (central) electronic fuel injection (Ci - Central injector). TOYOTA produced only two such engines: 1S-Fi and its successor 4S-Fi.
V - is only at the above engine 1KD-FTV, which means yet unknown.
If, after the dash are missing letters E, i, V - this is a carbureted gasoline engine (ie no electronic injection) or diesel with a conventional (mechanical) fuel pump.
Examples: 4A-F (carburetor); 3C-T (diesel).
Old enough petrol engines TOYOTA (development until 1988) after the dash may have a U or L, what they mean is hard to say.
Examples: 1G-EU, 1S-U, 2E-L.
Examples of titles engines firm TOYOTA:
5A-FE - petrol engine with 4 valves per cylinder and "narrow" cylinder head, standard horsepower series, with multipoint electronic fuel injection.
2C-T - diesel with 2 valves per cylinder, turbocharged and conventional (mechanically operated) pump.
2JZ-GTE - petrol engine with 4 valves per cylinder, the "broad" cylinder head, turbo-charged and multi-point electronic fuel injection.