Today's Date is
Feb 07, 2026
Efforts begin to reduce harmful emissions, 1960s
Automakers begin efforts to reduce harmful emissions, starting with the introduction of positive crankcase ventilation in 1963. PCV valves route gases back to the cylinders for further combustion. With the introduction of catalytic converters in the 1970s, hydrocarbon emissions are reduced 95 percent by the end of the century compared to emissions in 1967.
Automakers begin efforts to reduce harmful emissions, starting with the introduction of positive crankcase ventilation in 1963. PCV valves route gases back to the cylinders for further combustion. With the introduction of catalytic converters in the 1970s, hydrocarbon emissions are reduced 95 percent by the end of the century compared to emissions in 1967.
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Welcome to Hottle & Associates
Ken Haver,
President
President
Welcome to our website, and thank you for allowing us the opportunity to introduce you to our firm.
Hottle & Associates is a full-service, project-oriented engineering, design and drafting firm, located near Akron, Ohio. Our seasoned staff of mechanical engineers, designers and drafters specialize in specialty machine design, industrial design and the design of automated material handling systems. Since 1950, our worldwide project work covers a wide variety of industries, including the Tire & Rubber industry that is so prevalent within our region.
Hottle & Associates is a full-service, project-oriented engineering, design and drafting firm, located near Akron, Ohio. Our seasoned staff of mechanical engineers, designers and drafters specialize in specialty machine design, industrial design and the design of automated material handling systems. Since 1950, our worldwide project work covers a wide variety of industries, including the Tire & Rubber industry that is so prevalent within our region.
We invite you to review our site to learn a bit about us, and we also encourage you to contact us to discuss how we could be of service to you and your business, earn your trust, and become a long-term, valued resource for your engineering, design and drafting needs.