There is an autothrottle available for the CRJ-100/200 as an aftermarket STC. From Safe Flight's website:
Safe Flight's Automatic Throttle System Receives FAA Certification for Bombardier CRJ100/200 Regional Business Jet
WHITE PLAINS, NY, July 30, 2003 - Safe Flight Instrument Corporation today announced receipt of an FAA Supplemental Type Certificate of the company's AutoPower® System, a full-authority automatic throttle system for the Bombardier CRJ100/200 Regional Jet.....
The system provides takeoff to touchdown dual-servo control of the thrust levers in harmony with Aircraft Flight Control System vertical modes and Vertical Navigation target speeds. It uses the Flight Management System Thrust Management table-based N1 limit and target calculations as displayed on the Engine Indication and Crew Alerting Sytem N1 Fan Speed displays. AutoPower features glareshield-mounted mode displays and an engage switch.
"Autothrottle systems are typically found in larger aircraft. The CRJ100/200 will be the first Regional Jet in its weight class to offer such a system," said Jacques Lacasse, Program Coordinator, Fleet Services, Bombardier Aerospace. "AutoPower can be used to fly at a crew-selected speed, in cruise, descent or approach. This system promises to make the aircraft an even greater pleasure to fly, for both crew and passengers."
AutoPower benefits include: improved climb performance and payload/range potential; precise speed control; reduced crew workload; and smoother speed transitions for increased passenger comfort. It also enhances safety by automatically compensating for altitude changes and fuel burn to prevent potentially damaging engine overspeed/overtemp operation.
Studies indicate that automatic throttles can result in fuel savings. As aircraft weight reduces due to fuel burn, AutoPower maintains the pilot-selected speed by automatically reducing thrust for greater fuel efficiency. Additionally, AutoPower has aligned the CRJ100/200 cockpit with technologies of bigger jets, allowing the pilots to consistently fly to the optimum of the engine's performance. The system allows operators to be ahead of the curve when future requirements for RTA (Required Time of Arrival) are implemented.
Mr. Lacasse further noted that "Bombardier selected the Safe Flight AutoPower System for the CRJ100/200 because of its proven design and track record. AutoPower systems and components from Safe Flight Instrument Corporation have demonstrated unprecedented reliability on more than 9,000 corporate, commercial and military aircraft including the Bombardier 604."
AutoPower is now available for in-service aircraft retrofit installation through Bombardier Fleet Services.
Safe Flight Instrument Corporation, a leader in aviation safety and flight performance systems, was founded in 1946. Headquartered in White Plains, New York, the company pioneered the development of Stall Warning, Automatic Throttles, Wind Shear Warning, and many other innovations in aircraft instrumentation and control systems for fixed- and rotary-winged aircraft. Safe Flight products are installed on over two-thirds of the world's aircraft - in general aviation, commercial, and military sectors.