Electrical pedal

MICO Incorporated has invented a new electronic pedal control designed for off-highway and on-highway vehicles and equipment applications. The pedal control system is engineered for applications that require an electronic signal that is proportional to pedal travel. These can include throttle pedals for engine speed control and accelerator pedals to control the speed of machines with hydrostatic transmissions. Key to this design is the use of two Hall effect sensors instead of potentiometers. Each sensor has independent circuits required for failsafe systems. The electronic assembly is potted into the pedal base to minimise environmental effects, while making the unit tamperproof. It is designed for tough environments and the programmable aspect of the Hall effect device should allow customers the functionality they are looking for.

The pedal is ergonomically designed to increase operator comfort and productivity, and the large bearings are included to help provide extended service life.

•Control options for this electronic pedal control include PWM or analog outputs that meet SAE J1843 standards

• Dual return springs provide redundancy required in FMVSS 124

•Switches for idle validation signal and kick down signal are available

•The vehicle battery or a 5 V regulator can power the electronic pedal control

•A three-bolt, floor-mount configuration is designed to provide easy installation in any kind of equipment cab

•The control has an operating temperature range of -40 to 185° F

•The pedal mounting base is 5.49 in. long, while the pedal itself is 9.57 in. long

•The control assembly weighs approximately 2 lb

The MICO electronic pedal control will be initially targeted toward off-highway machinery.

Full-power hydraulic brake system with ABS

For more than 30 years OEMs of off-highway equipment have chosen MICO Full Power Brake Systems to reliably stop their vehicles. Now MICO brings the first full power hydraulic brake system with anti lock braking system (ABS). The hydraulic ABS (HABS) will provide shorter stopping distance with improved vehicle stability and control during aggressive braking situations. The system is designed to handle eight channels, or less, of HABS control. Starting with a full power system that employs brakes, a tandem modulating pedal valve, an accumulator charging system and dual accumulators. The Anti-lock Brake System uses:

•Speed sensors to monitor the speed of each wheel

•ABS electronic control unit to send current to the ABS valves when wheel slip occur

•Electro-hydraulic ABS valves to proportionally control the pressure at the brakes

•Pressure transducers and software algorithms for diagnostics

In addition to these basic components, additional inputs and outputs can be added to the system. For example, keyed power or ABS on/off switch signals are typical. Outputs to drive the stop lamps, low traction and brake warning indicator lights can be added. Other inputs and outputs can be custom designed as required — including CAN communications based on SAE J1939, ISO 11783 or other protocols used in your system. The ABS controller was developed specifically for applications in the harsh environment of mobile equipment. All inputs and outputs have been protected against shorts or over voltage and have built in diagnostics. The robust aluminium housing provides IP 65 protection and offers high immunity to electromagnetic disturbances.