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Contactless rotary position sensors brochure - .PDF file.

Briggs Automotive Company (BAC) is using customised position sensors from Curtiss-Wright in its central-seat Mono road car. The contactless rotary position sensor is a customised version of the standard Penny + Giles SRH280P model and features a special connector cable and configured output range to match the specific shaft position.

Operated via steering-wheel-mounted paddles, Mono uses an F3-specification, six-speed sequential Hewland gearbox with an electronic/pneumatic semi-automatic, closed-loop gear selection system that delivers paddle-shift changes in 35 milliseconds. This is coupled to a 2.3-litre, 285bhp four-cylinder Cosworth engine enabling the Mono to achieve a 0–60mph time of less than three seconds.

The closed-loop control system on Mono uses a gearbox control unit (GCU) with inputs from a Penny + Giles gear position sensor to alter its own operation in real time. During gear changes, the closed-loop system monitors the gear position sensor to determine the angular position of the gearbox selector barrel. Information from this is then relayed to the GCU to ensure use of the throttle blip, torque reduction or pneumatic actuator where necessary to effect consistently quick and reliable gearshifts.

Neill Briggs, BAC co-founder and technical director, said: ‘Used to relay gear position feedback to the GCU, sensors were vital during BAC’s development of Mono and are as vital under normal and track day driving conditions in informing the driver of the car’s current gear. We therefore needed a sensor that was dependable and reliable and met our exacting requirements for Mono, so we called Penny + Giles.’

Key features and benefits

  • Standard Penny + Giles SRH280P rotary position sensors use a factory-programmable, non-contact Hall-effect sensor system to provide reliable and accurate rotary position measurement in extreme motorsport and industrial environments where shock and vibration can occur.
  • Additional key features include single- or dual-output channels; total sensor measurement range from 0–20° to 0–360°; low-noise level (1mVrms) on output signal; crush-proof mounting flange with steel inserts; and rapid availability.
  • Using the 38mm flanged housing and with an environmental protection rating to IP68, the sensors operate from either 5VDC regulated or 9–30VDC unregulated power supplies and are available with analogue (0.5–4.5VDC and 0.1–4.9VDC) or digital (PWM) output signals.
  • The sensor is factory programmable — allowing OEMs to specify the output signal type, measurement range (0–20° to 0–360° in 1° increments) and output direction (clockwise or anticlockwise) — and it has a 12-bit resolution (0.025 per cent) over the selected measuring range. It operates from -40°C to +140°C when powered at 5VDC.

Curtiss-Wright Industrial Group

The Curtiss-Wright Industrial Group is formed from a number established specialist companies who are experts in the design, testing and manufacture of a range of components and systems for the safe and reliable operation and control of mobile and static machinery – especially off-highway vehicles, heavy trucks, buses, military vehicles and motorsport. Within the business are four market leading brands — Penny & Giles Controls, PG Drives Technology, William Controls, and Arens Controls.

The Curtiss-Wright Industrial Group is formed from a number established specialist companies who are experts in the design, testing and manufacture of a range of components and systems for the safe and reliable operation and control of mobile and static machinery – especially off-highway vehicles, heavy trucks, buses, military vehicles and motorsport. Within the business are four market leading brands — Penny & Giles Controls, PG Drives Technology, William Controls, and Arens Controls.

Penny & Giles Controls
Delivers rugged component level solutions using the latest non-contact sensing technologies, and specialises in rotary, linear and tilt position sensors; joysticks; solenoid actuators and associated electronic signal conditioning. The business was first established in 1956 and pioneered aerospace sensing and data recording technologies with a reputation for quality, performance and reliability. The aerospace business continues today within other Curtiss-Wright business units. The company joined Curtiss-Wright in 2002.

PG Drives Technology
Delivers rugged subsystem solutions including programmable controllers and drives used in a wide variety of advanced electric-powered vehicles such as forklifts, pallet loaders, mobility scooters and wheelchairs, serving the industrial and medical markets. These products deliver precise variable power from batteries to electric drive motors, and are fully programmable to suit various motor profiles, voltages and power levels. The business was first established in 1976 and was originally part of the Penny & Giles group of companies. The company joined Curtiss-Wright in 2012.

Williams Controls
Delivers rugged component level solutions and is a leading designer and manufacturer of highly-engineered electronic sensors and electronic throttle controls for off-road equipment, heavy trucks, and military vehicles. The business was first established in 1937 and pioneered the development of the first electronic throttle control for large diesel engines, quickly becoming the world leader in the design and manufacture of electronic throttle controls for trucks and buses. The company joined Curtiss-Wright in 2012.

Arens Controls
Delivers rugged component level and subsystem solutions and is a leading designer and manufacturer of highly engineered electronic shift controls for automatic transmissions used on heavy trucks and buses. The company also designs and manufactures power management and traction systems for the emerging Hybrid Electronic Vehicle (HEV) market. The business was first established in 1939 and pioneered the development of “by-wire” vehicle control technology, and more recently power electronic drivetrain components and systems for the HEV market. The company joined Curtiss-Wright in 2013.

Curtiss-Wright Industrial Group has manufacturing sites in the US, Europe, India and China. Total customer service and support is assured via a global sales network with CWIG offices in the US, UK, Germany, India, Taiwan and China, as well as a network of distributors and agents covering other regions.

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