The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983

The Concept: An OHV + Inclined Cylinder that Changed the World of General Purpose Engines

The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983

Initiating the ZE Project: From SV to OHV

Honda ordered the development of a consumer-oriented engine in October 1980 with the intention of having a successor to the popular ME model. When the decision was made, the ME's yearly sales volume was still under the 1 million mark, but it was only a matter of time before the figure would pass it. However, the ME engine had been developed for the industrial market, so in order to expand its overall market share for general purpose engines Honda had to gain a foothold in the consumer arena. To do this, the new engine's yearly sales target was to be three million units.

Initiating the ZE Project: From SV to OHV

The chassis-only tillers displayed at a retailer in Thailand. They are sold after being fitted with a separate, general purpose engine. Engines lacking installation compatibility are shut out of the retail sales channel.

To develop a new engine that was small, economical and maintenance-free, Honda's development staff analyzed vast collections of data gathered from the many ME engine units that had found their way into the world. And with that analysis a research project was started with two possible directions, the first being a side-valve (SV) engine with smaller displacement but higher performance, and the second being an overhead valve (OHV) engine.

The oil crises of the 1970s had made society more conscious of the need to conserve energy resources, and through its ME experience Honda knew it had to find a decisive feature unavailable with competing engines. Accordingly, the research effort began to focus on a fuel-efficient, high-output OHV engine. In 1981, Honda officially decided to adopt the OHV design as the mainstay of its next-generation engine line. Research was specifically directed to identify a structure and concept suitable for lawnmowers and general purpose applications.

Honda's interest in lawn mowers reflected a desire to reach out to customers for power products in the U.S. With regard to lawnmowers, Honda's engines were already respected among professionals for their superior performance, even prior to the ME's introduction. However, to meet current expectations and build sales, the OHV configuration was absolutely necessary. Therefore, the ZE project began with a two-prong approach, aiming to develop the ZE01 general-purpose engine and the ZE5 for lawnmowers.

The Challenging Spirit of Honda

1990 - 1999
  1. The Birth of Twin Ring Motegi / 1997The Birth of Twin Ring Motegi / 1997
  2. Entry to Champ Car Racing / 1994Entry to Champ Car Racing / 1994
  3. Odyssey / 1994Odyssey / 1994
  4. Establishment of Honda Taiyo, Kibo-no-Sato Honda and Honda R&D Taiyo / 1992Establishment of Honda Taiyo, Kibo-no-Sato Honda and Honda R&D Taiyo / 1992
  5. Hosting Hosting "Orei-no-kai" / 1991
  6. The NSX / 1990The NSX / 1990
1980 - 1989
  1. The VTEC Engine / 1989The VTEC Engine / 1989
  2. Honda EV Plus: The Dream of an Electric Vehicle / 1988Honda EV Plus: The Dream of an Electric Vehicle / 1988
  3. An Automated Line for Painting and Coating / 1988An Automated Line for Painting and Coating / 1988
  4. Four-Wheel Steering System (4WS) / 1987Four-Wheel Steering System (4WS) / 1987
  5. The Airbag System / 1987The Airbag System / 1987
  6. The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983The ZE Engine (GX110 / 140 / 240 / 270 / 340 Series) / 1983
  7. Formula One Entry / 1983Formula One Entry / 1983
  8. Development of Honda's Franz System Car / 1982Development of Honda's Franz System Car / 1982
  9. The World's Smallest Welding Line / 1982The World's Smallest Welding Line / 1982
  10. Transfer Lines for Modular Components / 1981Transfer Lines for Modular Components / 1981
  11. The Car Navigation System / 1981The Car Navigation System / 1981
  12. City / 1981City / 1981
  13. The F200 The F200 "Komame" Mini-Tiller / 1980
  14. Establishing Honda of America Manufacturing / 1980Establishing Honda of America Manufacturing / 1980
1970 - 1979
  1. The Oval Piston Engine / 1979The Oval Piston Engine / 1979
  2. Returning to the World Motorcycle Grand Prix / 1979Returning to the World Motorcycle Grand Prix / 1979
  3. The HR21 Lawn Mower / 1978The HR21 Lawn Mower / 1978
  4. Creating Hometown Forests / 1977Creating Hometown Forests / 1977
  5. The ME Engine (G100 / 150 / 200 / 300 / 400 Series) / 1977The ME Engine (G100 / 150 / 200 / 300 / 400 Series) / 1977
  6. Introducing the Accord / 1976Introducing the Accord / 1976
  7. CG125 / 1975CG125 / 1975
  8. Establishment of Honda Engineering / 1974Establishment of Honda Engineering / 1974
  9. Company Leaders Honda and Fujisawa Retire; Kawashima Assumes Presidency / 1973Company Leaders Honda and Fujisawa Retire; Kawashima Assumes Presidency / 1973
  10. Announcing the Civic / 1972Announcing the Civic / 1972
  11. Introducing the CVCC / 1972Introducing the CVCC / 1972
  12. Holding All Honda Idea Contests / 1970Holding All Honda Idea Contests / 1970
  13. Launching the Office of Safe Driving Promotional Operations / 1970Launching the Office of Safe Driving Promotional Operations / 1970
1960 - 1969
  1. The Dream CB750 FOUR / 1969The Dream CB750 FOUR / 1969
  2. Launching the Honda 1300 / 1968Launching the Honda 1300 / 1968
  3. The Hondamatic Transmission / 1968The Hondamatic Transmission / 1968
  4. Entering the Auto Market at Last / 1966Entering the Auto Market at Last / 1966
  5. The E300 Portable Generator / 1965The E300 Portable Generator / 1965
  6. Formula One Entry / 1964Formula One Entry / 1964
  7. Kyoto: Celebrating the Company's 15th Anniversary / 1963Kyoto: Celebrating the Company's 15th Anniversary / 1963
  8. Establishing Belgium Honda / 1963Establishing Belgium Honda / 1963
  9. Launching the S360 and T360 / 1962Launching the S360 and T360 / 1962
  10. Employing the Employing the "My Record" Project and Expert Certification / 1960
  11. The R&D Center Goes Independent / 1960The R&D Center Goes Independent / 1960
1950 - 1959
  1. Establishing American Honda Motor Co. / 1959Establishing American Honda Motor Co. / 1959

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