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

OHV: Benefits and Disadvantages

Most general purpose engines were in those days of the SV type. Accordingly, new OHV engines were expected to give the edge to Honda, since SV engines consumed more gasoline and oil, and were noisy and hot. In addition, they had shown themselves to be subject to problems in initial quality. The OHV configuration, on the other hand, was more powerful, economical, cleaner, quieter, and more durable. However, despite the OHV's obvious benefits, the SV configuration remained the mainstream in general purpose applications.

OHV: Benefits and Disadvantages

A local market-compatibility test for the ZE Series model CX140, held in Thailand (Photograph on those days courtesy of Yoshinobu Yamaguchi)

The reasons for that were as follows:

First, the OHV engine was larger because its valve had to be mounted above the cylinder. The OEM companies would not accept any engines exceeding their standard installation dimensions, which were for the most part based on SV engines. To find a market, a general purpose engine had to ensure "installation compatibility.

Second, the larger number of parts made the OHV heavier and more costly. Portability and economy are basic requirements in the world of general purpose engines. No matter how well one might perform, no engine would be accepted as a commercial product if the basic requirements - again, portability and economy - were not satisfied. For these reasons the OHV engine design had been studied by most manufacturers, but never seriously developed.

The ZE5 lawn mower engine would have a certain amount of latitude in dealing with these characteristics, because it was developed as part of a complete machine. However, the ZE01 general-purpose engine targeting OEM companies found itself up against a wall. The problems of size, weight, and cost necessitated engineering targets that had to be achieved in order to develop a successful product. Such problems also meant they would have to depart from common sense thinking with regard to general purpose engines.

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

Page Top

Honda Worldwide site

Home | Site Map | Site Index | About this Site

Copyright, Honda Motor Co., Ltd. and its subsidiaries and affiliates. All Rights Reserved.