Engineering Innovations on Acura NSX [1994]

This document provides an overview of the myriad of technical innovations found on the NSX. These are from the 1994 model year specification. They were supplied to me by Jeffrey Kuhn at Sunshine Acura. It is obviously still undergoing HTMLizing! :-)

Body

Aluminum Unit-Body Construction

World's first aluminum production car
Unit body weighs only 462 lbs -- 40% less than steel
Incorporates unique high-strength extruded-aluminum side sills
Unique heat treatment ensures surfaces hardness
Highly corrosion resistant
High torsional and bending rigidity

Cabin Forward/Long-Tail Design

Provides best visibility in class -- 312 degrees
Significantly improves aerodynamic balance
Provides optimum occupant and component layout

Powertrain

VTEC System

First application in U.S.
Unique Variable Valve Timing and Lift Electronic Control (VTEC) system
Uses two different cam profiles to improve low-end torque and high-end power
Boosts engine performance to 90 hp per liter

Variable Volume Induction Svstem

Improves power and torque by optimizing air induction at all rpm

Direct Ignition

Eliminates distributor
Each plug has own ignition coil similar to race engine
Delivers stable high voltage to spark plugs

Titanium Connecting Rods

World's first use in a production car
Stronger than steel and lightweight -- saves 190 grams
Reduces reciprocating mass for high rpm engine operation

Twin-Disc Clutch

Two smaller-diameter friction discs replace large, heavier single disc
Better design for high engine output

Transmission

Refined transmission gears for quieter operation

Torque Control Differential

Unique limited slip differential
Improves stability in crosswinds

Chassis

All-Aluminum Suspension

Aluminum 4-wheel double-wishbone design
Forged-aluminum suspension arms for strength and low unsprung
Front suspension utilizes unique compliance pivot for ideal suspension geometry and ride quality
44 lbs (20 kilograms) lighter than steel

Four-Channel Anti-Lock Braking System (ABS)

First use in U.S.
Provides more precise independent braking control over each wheel

Traction Control System (TCS)

Enhances performance over wide range of conditions rather than just low friction surfaces
System can be shut off manually by driver

Electric Power-Assisted Steering (AT models only)

First of its kind on American market
Electric variable power-assist uses electric motor rather than hydraulics to reduce steering effort
Reduces weight
Does not take power away from engine to operate hydraulic pump

Custom-Designed Tires and Wheels

New, larger wheels and tires. Front: 215/45ZR 16 tires on 16 x 7 JJ forged alloy wheels; Rear: 245/40ZR 17 tires on 17 x 8.5 JJ forged alloy wheels
Unidirectional tires specific to each corner of the car
Different compounds used front and rear
Light-weight, forged, aluminum-alloy wheels reduce unsprung weight by 19.8 lbs (9 kg) over cast wheels

Interior

Dual Air Bags plus Automatic Seat Belt Tensioners Provide Supplemental Restraint System (SRS)

Compact air bag design allows use in small steering wheel space
Electrical connectors are gold-plated to enhance conductivity and provide corrosion protection and reliability
Automatic seat belt tensioners help to hold occupants in place

Aluminum Seat Frame

First for a production car
Entire seat frame made of lightweight stamped aluminum
Has 1/3 fewer parts than steel seat
Seat rails made from aluminum extrusions

1994 Engineering Innovations / [[email protected]]