Truck & Off-Highway Engineering - April 2022 - 22

HITTING THE GAS ON
HYDROGEN
TECH
Though PFI systems are simpler to implement than DFI,
they are much less thermally efficient.
truck platform around the technology. "
Toyota's FCEV prototypes spent significant time in
service in the port of Los Angeles and Long Beach,
California, in addition to being weather-tested at the
company's facility in Arizona, the upper peninsula of
Michigan, and Pikes Peak in Colorado. Toyota states that
there have been two generations of fuel cell stacks developed
and nearly 20 trucks produced to date.
There are four main components of Toyota's fuel cell
drive kit: the fuel cell stack, a high-voltage battery, the
hydrogen storage assembly and an eDrivetrain module.
The fuel cell stack assembly consists of two integrated
fuel cell modules providing a continuous net power output
of 160 kW. This integrated module packages within
a majority of heavy-duty OEM engine bays.
The high-voltage battery assembly is packaged below
the cab and provides supplementary power when
necessary and aid in regenerative braking. The hydrogen
storage assembly packages behind the truck cab
and contains hydrogen storage tanks, related components
and up to 60 kg (130 lbs) of fuel. The eDrivetrain
module contains two electric motors and transmission
and is located below the hydrogen storage assembly.
It can provide up to 450 kW of peak power and 2400
Nm (1770 lb-ft) of peak torque.
" This system can haul 82,000 lbs (37,000 kg) GVWR
load over 300 miles (482 km) at the same or better
performance as any similar diesel powertrain, " Rovik
said. " I don't want there to be any ambiguity about
the range. The 300-mile range is fully loaded at
82,000 lbs and on real roads. It is also important to
note that that is a minimum range. "
22 April 2022
In 2019, a ten-truck pilot program utilizing the Toyota FCEV kit was
launched in partnership with Kenworth Trucks. Kenworth assembled
the trucks at its plant using Toyota's kit, and they are now being operated
by actual fleet customers and drivers. To date, these pilot
trucks have logged over 50,000 miles (80,000 km). Toyota has stated
that these modules will enter series production at the company's
plant in Kentucky starting in 2023.
" Our primary intention is to get these trucks into market as quickly
as possible, " said Rovik. " Every [hydrogen] truck we sell displaces a
diesel truck and improves the environment. This kit is designed as a
drop-in replacement for diesel, allowing quick implementation for
potential truck OEM partners. "
Widespread development
Other OEMs also are expanding their portfolios of hydrogen technologies.
General Motors recently announced its intentions to further develop
hydrogen technology by expanding the functionality of its
Hydrotec hydrogen fuel cells with the integration of a DC rapid charger.
GM's Generation 2 Hydrotec power cubes have a power output
range of 60-600 kW. The units had been originally developed for applications
such as heavy-duty trucks, marine, aerospace and rail, but
GM has broadened their use to include stationary power generation.
" Our vision of an all-electric future is broader than just passenger
vehicles or even transportation, " said Charlie Freese, GM executive
director of the global Hydrotec business. " Our energy platform expertise
with Ultium vehicle architectures and propulsion components
and Hydrotec fuel cells can expand access to energy across many
different industries and users, while helping to reduce emissions often
associated with power generation. "
In January 2021, GM announced an agreement with Navistar to
supply the company's forthcoming hydrogen-powered RH truck with
TRUCK & OFF-HIGHWAY ENGINEERING
STANADYNE
Truck & Off-Highway Engineering - April 2022

Table of Contents for the Digital Edition of Truck & Off-Highway Engineering - April 2022
