2020 Toyota Highlander Hybrid Explained
64Toyota presented its new 2020 Highlander Hybrid at the motor show in New York. It features a number of new advanced safety systems. Bill Fay is the Senior Vice President of Auto Operations at Toyota North America. He told Auto Futures about the new safety tech and why hybrids and plug-ins remain central to Toyota’s plans.
Toyota made “hybrid” synonymous with high fuel efficiency more than 20 years ago. Later, Toyota introduced the first hybrid SUV in its class, the 2006 Highlander. Leave it to Toyota to again raise the bar for hybrid SUV functionality by making the 2020 model the most fuel-efficient Highlander Hybrid ever.
The new-generation Toyota Hybrid System in the 2020 Highlander Hybrid combines a high-efficiency 2.5-liter DOHC four-cylinder engine with two electric motors in a system that’s more compact, and more efficient than before. The gas engine employs Variable Valve Timing-intelligent system by Electric motor (VVT-iE) on the intake camshaft, and VVT-i on the exhaust camshaft. A variable cooling system (electric water pump, electric thermostat) and a fully variable oil pump further improve engine efficiency.
The bottom line is an eye opener for the efficiency-minded: 240 total system horsepower and an EPA-estimated 34 combined MPG. The latter is a 17-percent improvement over the previous-generation Highlander Hybrid’s 28 combined MPG. Yet, Highlander Hybrid still delivers the everyday acceleration, power and responsiveness that family buyers expect. In another Highlander first, the hybrid is now available in either 2WD or AWD, further expanding hybrid technology to a new group of buyers.
The transaxle mounts the electric motors (MG1 and MG2) coaxially rather than in-line, and the resulting smaller and lighter package reduces frictional losses. The gas engine and MG2 work in concert to deliver dynamic performance, while both MG1 and MG2 charge the hybrid battery.
To reduce the transaxle’s size and weight, the reduction gear is now a parallel shaft gear, rather than a planetary, and a new multi-function gear integrates the power-split planetary ring gear, parking gear, and counter-drive gear. New computer integration and a smaller, lighter power stack installed directly above the transaxle reduce energy transmission losses.
The battery pack is small enough to be installed under the rear seats, so it does not take up any cargo or passenger space.
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